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In the new Disney/Marvel canon, in which all new comics, books, and games are considered to have the same level of canon as the movies, Vader has his first direct confrontation with Luke between Episodes IV and V, but doesn't know who he is. This is shown in Marvel's monthly comic series Star Wars. In Issue #2, after taking Luke's lightsaber, Vader takes a closer look at it and realizes it used to be his own.

Marvel Star Wars (2015) #2Page from Marvel Star Wars (2015) #2: top panel frames Luke's head and shoulders. Luke, wearing a beige jacket, faces directly toward the reader, holding his lightsaber at shoulder height in front of him with the blade pointing upward to his left of his face.  The colour of his lightsaber is echoed in his eyes and reflects off the side of his face.  Off-screen Vader says "You hold that weapon like an untrained child.  You have no right to it.  You, boy, are no Jedi."  The second panel reverses view, looking at Vader over Luke's left shoulder.  Vader stands facing Luke with his lightsaber held low and to the side, pointing diagonally upward to his right. The lightsaber's red colour reflects from his wrist guard, his cape and the corner of his helmet.  Vader asks "Who are you?"  Luke replies "You killed my father."  Vader rejoins "I've killed very many fathers.  You'll have to be more specific."

enter image description hereSubsequent frame from same comic; low view of Vader's head and shoulders against the ceiling.  Vader is holding Luke's lightsaber in his left hand.  He says "Wait... this lightsaber...  I know this weapon.  This once belonged to--"

Vader is suspicious that Obi-Wan was hiding something, but he doesn't yet realize that Luke is his son (he doesn't learn his name in this scene). It doesn't rule out the possibility that Obi-Wan gave his old apprentice's lightsaber to some random guy he found and trained.

But in Issue 6, Boba Fett learns the name of the young wannabe-Jedi that blew up the Death Star. He relays this information to Vader.

enter image description hereFrame from Marvel Star Wars (2015) #6: headshot of Boba Fett facing the reader.
Vader (off-screen) says "Did you bring me anything of value, bounty hunter?"  Fett replies "Not much.  Just his name."

enter image description hereSubsequent frame:  Side view of Vader's head, looking to the right against a window.  Fett (off-screen) says "Skywalker."

Suffice to say, he's not pleased.

enter image description hereFollowing page:  first panel, inset, shows a close-up of Vader's helmet framing just his eyes and his cheeks.  A crack runs across the panel in front of him.  Vader repeats "Skywalker."  The second panel, over the rest of the page, shows Vader, full length, standing in front of a triangular window with his fists clenched at his waist.  The window is crazed with cracks running all over it.

Later, in Issue 6 of Marvel's Darth Vader comic series, this scene is shown again and expanded upon. Vader makes the immediate connection to Padme and having been lied to by the Emperor about the exact circumstances of her death. He makes a hologram call to the Emperor similar to the one in TESB:

The Emperor: Yes, Vader? Ah... I sense your anger. Great anger. Have you something to say? Some proud, defiant words? Or are you wise enough to know your place?

(beat)

Darth Vader: I am angry. You would not have me otherwise. My anger brought me to you. I want you to know--I will not fail. And I understand us precisely.

It's worth noting that in the 2004 DVD and 2011 Blu-ray edits, considered to be the current state of canon, the conversation with the Emperor mentioned in the original question is altered:

The Emperor: We have a new enemy. The young rebel who destroyed the Death Star. I have no doubt this boy is the offspring of Anakin Skywalker.
Darth

Darth Vader: How is that possible?
The

The Emperor: Search your feelings, Lord Vader. You will know it to be true. He could destroy us.
Darth

Darth Vader: He's just a boy. Obi-Wan can no longer help him.
The

The Emperor: The Force is strong with him. The son of Skywalker must not become a Jedi.

It's strongly implied here that Vader and the Emperor had never discussed Luke up until this point. Vader's line "How is that possible?" could originally have meant anything from that he didn't know previously, to that he had guessed but didn't understand the particulars given that he'd thought he'd killed Padmé on the landing platform, to that he wanted to pretend that he hadn't known and was "playing along" the same way that the Emperor was referring to Anakin Skywalker as a third party, to that he knew the Emperor hadn't known and wanted to hide the fact that he, Vader, had known. This new information eliminates the first interpretation, but the exact meaning of Vader's "how is that possible" is still up to speculation as of issue 6 of the comic series.

In the new Disney/Marvel canon, in which all new comics, books, and games are considered to have the same level of canon as the movies, Vader has his first direct confrontation with Luke between Episodes IV and V, but doesn't know who he is. This is shown in Marvel's monthly comic series Star Wars. In Issue #2, after taking Luke's lightsaber, Vader takes a closer look at it and realizes it used to be his own.

Marvel Star Wars (2015) #2

enter image description here

Vader is suspicious that Obi-Wan was hiding something, but he doesn't yet realize that Luke is his son (he doesn't learn his name in this scene). It doesn't rule out the possibility that Obi-Wan gave his old apprentice's lightsaber to some random guy he found and trained.

But in Issue 6, Boba Fett learns the name of the young wannabe-Jedi that blew up the Death Star. He relays this information to Vader.

enter image description here

enter image description here

Suffice to say, he's not pleased.

enter image description here

Later, in Issue 6 of Marvel's Darth Vader comic series, this scene is shown again and expanded upon. Vader makes the immediate connection to Padme and having been lied to by the Emperor about the exact circumstances of her death. He makes a hologram call to the Emperor similar to the one in TESB:

The Emperor: Yes, Vader? Ah... I sense your anger. Great anger. Have you something to say? Some proud, defiant words? Or are you wise enough to know your place?

(beat)

Darth Vader: I am angry. You would not have me otherwise. My anger brought me to you. I want you to know--I will not fail. And I understand us precisely.

It's worth noting that in the 2004 DVD and 2011 Blu-ray edits, considered to be the current state of canon, the conversation with the Emperor mentioned in the original question is altered:

The Emperor: We have a new enemy. The young rebel who destroyed the Death Star. I have no doubt this boy is the offspring of Anakin Skywalker.
Darth Vader: How is that possible?
The Emperor: Search your feelings, Lord Vader. You will know it to be true. He could destroy us.
Darth Vader: He's just a boy. Obi-Wan can no longer help him.
The Emperor: The Force is strong with him. The son of Skywalker must not become a Jedi.

It's strongly implied here that Vader and the Emperor had never discussed Luke up until this point. Vader's line "How is that possible?" could originally have meant anything from that he didn't know previously, to that he had guessed but didn't understand the particulars given that he'd thought he'd killed Padmé on the landing platform, to that he wanted to pretend that he hadn't known and was "playing along" the same way that the Emperor was referring to Anakin Skywalker as a third party, to that he knew the Emperor hadn't known and wanted to hide the fact that he, Vader, had known. This new information eliminates the first interpretation, but the exact meaning of Vader's "how is that possible" is still up to speculation as of issue 6 of the comic series.

In the new Disney/Marvel canon, in which all new comics, books, and games are considered to have the same level of canon as the movies, Vader has his first direct confrontation with Luke between Episodes IV and V, but doesn't know who he is. This is shown in Marvel's monthly comic series Star Wars. In Issue #2, after taking Luke's lightsaber, Vader takes a closer look at it and realizes it used to be his own.

Page from Marvel Star Wars (2015) #2: top panel frames Luke's head and shoulders. Luke, wearing a beige jacket, faces directly toward the reader, holding his lightsaber at shoulder height in front of him with the blade pointing upward to his left of his face.  The colour of his lightsaber is echoed in his eyes and reflects off the side of his face.  Off-screen Vader says "You hold that weapon like an untrained child.  You have no right to it.  You, boy, are no Jedi."  The second panel reverses view, looking at Vader over Luke's left shoulder.  Vader stands facing Luke with his lightsaber held low and to the side, pointing diagonally upward to his right. The lightsaber's red colour reflects from his wrist guard, his cape and the corner of his helmet.  Vader asks "Who are you?"  Luke replies "You killed my father."  Vader rejoins "I've killed very many fathers.  You'll have to be more specific."

Subsequent frame from same comic; low view of Vader's head and shoulders against the ceiling.  Vader is holding Luke's lightsaber in his left hand.  He says "Wait... this lightsaber...  I know this weapon.  This once belonged to--"

Vader is suspicious that Obi-Wan was hiding something, but he doesn't yet realize that Luke is his son (he doesn't learn his name in this scene). It doesn't rule out the possibility that Obi-Wan gave his old apprentice's lightsaber to some random guy he found and trained.

But in Issue 6, Boba Fett learns the name of the young wannabe-Jedi that blew up the Death Star. He relays this information to Vader.

Frame from Marvel Star Wars (2015) #6: headshot of Boba Fett facing the reader.
Vader (off-screen) says "Did you bring me anything of value, bounty hunter?"  Fett replies "Not much.  Just his name."

Subsequent frame:  Side view of Vader's head, looking to the right against a window.  Fett (off-screen) says "Skywalker."

Suffice to say, he's not pleased.

Following page:  first panel, inset, shows a close-up of Vader's helmet framing just his eyes and his cheeks.  A crack runs across the panel in front of him.  Vader repeats "Skywalker."  The second panel, over the rest of the page, shows Vader, full length, standing in front of a triangular window with his fists clenched at his waist.  The window is crazed with cracks running all over it.

Later, in Issue 6 of Marvel's Darth Vader comic series, this scene is shown again and expanded upon. Vader makes the immediate connection to Padme and having been lied to by the Emperor about the exact circumstances of her death. He makes a hologram call to the Emperor similar to the one in TESB:

The Emperor: Yes, Vader? Ah... I sense your anger. Great anger. Have you something to say? Some proud, defiant words? Or are you wise enough to know your place?

(beat)

Darth Vader: I am angry. You would not have me otherwise. My anger brought me to you. I want you to know--I will not fail. And I understand us precisely.

It's worth noting that in the 2004 DVD and 2011 Blu-ray edits, considered to be the current state of canon, the conversation with the Emperor mentioned in the original question is altered:

The Emperor: We have a new enemy. The young rebel who destroyed the Death Star. I have no doubt this boy is the offspring of Anakin Skywalker.

Darth Vader: How is that possible?

The Emperor: Search your feelings, Lord Vader. You will know it to be true. He could destroy us.

Darth Vader: He's just a boy. Obi-Wan can no longer help him.

The Emperor: The Force is strong with him. The son of Skywalker must not become a Jedi.

It's strongly implied here that Vader and the Emperor had never discussed Luke up until this point. Vader's line "How is that possible?" could originally have meant anything from that he didn't know previously, to that he had guessed but didn't understand the particulars given that he'd thought he'd killed Padmé on the landing platform, to that he wanted to pretend that he hadn't known and was "playing along" the same way that the Emperor was referring to Anakin Skywalker as a third party, to that he knew the Emperor hadn't known and wanted to hide the fact that he, Vader, had known. This new information eliminates the first interpretation, but the exact meaning of Vader's "how is that possible" is still up to speculation as of issue 6 of the comic series.

Commonmark migration
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In the new Disney/Marvel canon, in which all new comics, books, and games are considered to have the same level of canon as the movies, Vader has his first direct confrontation with Luke between Episodes IV and V, but doesn't know who he is. This is shown in Marvel's monthly comic series Star Wars. In Issue #2, after taking Luke's lightsaber, Vader takes a closer look at it and realizes it used to be his own.

Marvel Star Wars (2015) #2

enter image description here

Vader is suspicious that Obi-Wan was hiding something, but he doesn't yet realize that Luke is his son (he doesn't learn his name in this scene). It doesn't rule out the possibility that Obi-Wan gave his old apprentice's lightsaber to some random guy he found and trained.

But in Issue 6, Boba Fett learns the name of the young wannabe-Jedi that blew up the Death Star. He relays this information to Vader.

enter image description here

enter image description here

Suffice to say, he's not pleased.

enter image description here

Later, in Issue 6 of Marvel's Darth Vader comic series, this scene is shown again and expanded upon. Vader makes the immediate connection to Padme and having been lied to by the Emperor about the exact circumstances of her death. He makes a hologram call to the Emperor similar to the one in TESB:

The Emperor: Yes, Vader? Ah... I sense your anger. Great anger. Have you something to say? Some proud, defiant words? Or are you wise enough to know your place?

 

(beat)

 

Darth Vader: I am angry. You would not have me otherwise. My anger brought me to you. I want you to know--I will not fail. And I understand us precisely.

It's worth noting that in the 2004 DVD and 2011 Blu-ray edits, considered to be the current state of canon, the conversation with the Emperor mentioned in the original question is altered:

The Emperor: We have a new enemy. The young rebel who destroyed the Death Star. I have no doubt this boy is the offspring of Anakin Skywalker.
Darth Vader: How is that possible?
The Emperor: Search your feelings, Lord Vader. You will know it to be true. He could destroy us.
Darth Vader: He's just a boy. Obi-Wan can no longer help him.
The Emperor: The Force is strong with him. The son of Skywalker must not become a Jedi.

It's strongly implied here that Vader and the Emperor had never discussed Luke up until this point. Vader's line "How is that possible?" could originally have meant anything from that he didn't know previously, to that he had guessed but didn't understand the particulars given that he'd thought he'd killed Padmé on the landing platform, to that he wanted to pretend that he hadn't known and was "playing along" the same way that the Emperor was referring to Anakin Skywalker as a third party, to that he knew the Emperor hadn't known and wanted to hide the fact that he, Vader, had known. This new information eliminates the first interpretation, but the exact meaning of Vader's "how is that possible" is still up to speculation as of issue 6 of the comic series.

In the new Disney/Marvel canon, in which all new comics, books, and games are considered to have the same level of canon as the movies, Vader has his first direct confrontation with Luke between Episodes IV and V, but doesn't know who he is. This is shown in Marvel's monthly comic series Star Wars. In Issue #2, after taking Luke's lightsaber, Vader takes a closer look at it and realizes it used to be his own.

Marvel Star Wars (2015) #2

enter image description here

Vader is suspicious that Obi-Wan was hiding something, but he doesn't yet realize that Luke is his son (he doesn't learn his name in this scene). It doesn't rule out the possibility that Obi-Wan gave his old apprentice's lightsaber to some random guy he found and trained.

But in Issue 6, Boba Fett learns the name of the young wannabe-Jedi that blew up the Death Star. He relays this information to Vader.

enter image description here

enter image description here

Suffice to say, he's not pleased.

enter image description here

Later, in Issue 6 of Marvel's Darth Vader comic series, this scene is shown again and expanded upon. Vader makes the immediate connection to Padme and having been lied to by the Emperor about the exact circumstances of her death. He makes a hologram call to the Emperor similar to the one in TESB:

The Emperor: Yes, Vader? Ah... I sense your anger. Great anger. Have you something to say? Some proud, defiant words? Or are you wise enough to know your place?

 

(beat)

 

Darth Vader: I am angry. You would not have me otherwise. My anger brought me to you. I want you to know--I will not fail. And I understand us precisely.

It's worth noting that in the 2004 DVD and 2011 Blu-ray edits, considered to be the current state of canon, the conversation with the Emperor mentioned in the original question is altered:

The Emperor: We have a new enemy. The young rebel who destroyed the Death Star. I have no doubt this boy is the offspring of Anakin Skywalker.
Darth Vader: How is that possible?
The Emperor: Search your feelings, Lord Vader. You will know it to be true. He could destroy us.
Darth Vader: He's just a boy. Obi-Wan can no longer help him.
The Emperor: The Force is strong with him. The son of Skywalker must not become a Jedi.

It's strongly implied here that Vader and the Emperor had never discussed Luke up until this point. Vader's line "How is that possible?" could originally have meant anything from that he didn't know previously, to that he had guessed but didn't understand the particulars given that he'd thought he'd killed Padmé on the landing platform, to that he wanted to pretend that he hadn't known and was "playing along" the same way that the Emperor was referring to Anakin Skywalker as a third party, to that he knew the Emperor hadn't known and wanted to hide the fact that he, Vader, had known. This new information eliminates the first interpretation, but the exact meaning of Vader's "how is that possible" is still up to speculation as of issue 6 of the comic series.

In the new Disney/Marvel canon, in which all new comics, books, and games are considered to have the same level of canon as the movies, Vader has his first direct confrontation with Luke between Episodes IV and V, but doesn't know who he is. This is shown in Marvel's monthly comic series Star Wars. In Issue #2, after taking Luke's lightsaber, Vader takes a closer look at it and realizes it used to be his own.

Marvel Star Wars (2015) #2

enter image description here

Vader is suspicious that Obi-Wan was hiding something, but he doesn't yet realize that Luke is his son (he doesn't learn his name in this scene). It doesn't rule out the possibility that Obi-Wan gave his old apprentice's lightsaber to some random guy he found and trained.

But in Issue 6, Boba Fett learns the name of the young wannabe-Jedi that blew up the Death Star. He relays this information to Vader.

enter image description here

enter image description here

Suffice to say, he's not pleased.

enter image description here

Later, in Issue 6 of Marvel's Darth Vader comic series, this scene is shown again and expanded upon. Vader makes the immediate connection to Padme and having been lied to by the Emperor about the exact circumstances of her death. He makes a hologram call to the Emperor similar to the one in TESB:

The Emperor: Yes, Vader? Ah... I sense your anger. Great anger. Have you something to say? Some proud, defiant words? Or are you wise enough to know your place?

(beat)

Darth Vader: I am angry. You would not have me otherwise. My anger brought me to you. I want you to know--I will not fail. And I understand us precisely.

It's worth noting that in the 2004 DVD and 2011 Blu-ray edits, considered to be the current state of canon, the conversation with the Emperor mentioned in the original question is altered:

The Emperor: We have a new enemy. The young rebel who destroyed the Death Star. I have no doubt this boy is the offspring of Anakin Skywalker.
Darth Vader: How is that possible?
The Emperor: Search your feelings, Lord Vader. You will know it to be true. He could destroy us.
Darth Vader: He's just a boy. Obi-Wan can no longer help him.
The Emperor: The Force is strong with him. The son of Skywalker must not become a Jedi.

It's strongly implied here that Vader and the Emperor had never discussed Luke up until this point. Vader's line "How is that possible?" could originally have meant anything from that he didn't know previously, to that he had guessed but didn't understand the particulars given that he'd thought he'd killed Padmé on the landing platform, to that he wanted to pretend that he hadn't known and was "playing along" the same way that the Emperor was referring to Anakin Skywalker as a third party, to that he knew the Emperor hadn't known and wanted to hide the fact that he, Vader, had known. This new information eliminates the first interpretation, but the exact meaning of Vader's "how is that possible" is still up to speculation as of issue 6 of the comic series.

replaced http://scifi.stackexchange.com/ with https://scifi.stackexchange.com/
Source Link

In the new Disney/Marvel canon, in which all new comics, books, and games are considered to have the same level of canon as the movies, Vader has his first direct confrontation with Luke between Episodes IV and V, but doesn't know who he is. This is shown in Marvel's monthly comic series Star Wars. In Issue #2, after taking Luke's lightsaber, Vader takes a closer look at it and realizes it used to be his own.

Marvel Star Wars (2015) #2

enter image description here

Vader is suspicious that Obi-Wan was hiding something, but he doesn't yet realize that Luke is his son (he doesn't learn his name in this scene). It doesn't rule out the possibility that Obi-Wan gave his old apprentice's lightsaber to some random guy he found and trained.

But in Issue 6, Boba Fett learns the name of the young wannabe-Jedi that blew up the Death Star. He relays this information to Vader.

enter image description here

enter image description here

Suffice to say, he's not pleased.

enter image description here

Later, in Issue 6 of Marvel's Darth Vader comic series, this scene is shown again and expanded upon. Vader makes the immediate connection to Padme and having been lied to by the Emperor about the exact circumstances of her death. He makes a hologram call to the Emperor similar to the one in TESB:

The Emperor: Yes, Vader? Ah... I sense your anger. Great anger. Have you something to say? Some proud, defiant words? Or are you wise enough to know your place?

(beat)

Darth Vader: I am angry. You would not have me otherwise. My anger brought me to you. I want you to know--I will not fail. And I understand us precisely.

It's worth noting that in the 2004 DVD and 2011 Blu-ray edits, considered to be the current state of canon, the conversation with the Emperor mentioned in the original question is alteredaltered:

The Emperor: We have a new enemy. The young rebel who destroyed the Death Star. I have no doubt this boy is the offspring of Anakin Skywalker.
Darth Vader: How is that possible?
The Emperor: Search your feelings, Lord Vader. You will know it to be true. He could destroy us.
Darth Vader: He's just a boy. Obi-Wan can no longer help him.
The Emperor: The Force is strong with him. The son of Skywalker must not become a Jedi.

It's strongly implied here that Vader and the Emperor had never discussed Luke up until this point. Vader's line "How is that possible?" could originally have meant anything from that he didn't know previously, to that he had guessed but didn't understand the particulars given that he'd thought he'd killed Padmé on the landing platform, to that he wanted to pretend that he hadn't known and was "playing along" the same way that the Emperor was referring to Anakin Skywalker as a third party, to that he knew the Emperor hadn't known and wanted to hide the fact that he, Vader, had known. This new information eliminates the first interpretation, but the exact meaning of Vader's "how is that possible" is still up to speculation as of issue 6 of the comic series.

In the new Disney/Marvel canon, in which all new comics, books, and games are considered to have the same level of canon as the movies, Vader has his first direct confrontation with Luke between Episodes IV and V, but doesn't know who he is. This is shown in Marvel's monthly comic series Star Wars. In Issue #2, after taking Luke's lightsaber, Vader takes a closer look at it and realizes it used to be his own.

Marvel Star Wars (2015) #2

enter image description here

Vader is suspicious that Obi-Wan was hiding something, but he doesn't yet realize that Luke is his son (he doesn't learn his name in this scene). It doesn't rule out the possibility that Obi-Wan gave his old apprentice's lightsaber to some random guy he found and trained.

But in Issue 6, Boba Fett learns the name of the young wannabe-Jedi that blew up the Death Star. He relays this information to Vader.

enter image description here

enter image description here

Suffice to say, he's not pleased.

enter image description here

Later, in Issue 6 of Marvel's Darth Vader comic series, this scene is shown again and expanded upon. Vader makes the immediate connection to Padme and having been lied to by the Emperor about the exact circumstances of her death. He makes a hologram call to the Emperor similar to the one in TESB:

The Emperor: Yes, Vader? Ah... I sense your anger. Great anger. Have you something to say? Some proud, defiant words? Or are you wise enough to know your place?

(beat)

Darth Vader: I am angry. You would not have me otherwise. My anger brought me to you. I want you to know--I will not fail. And I understand us precisely.

It's worth noting that in the 2004 DVD and 2011 Blu-ray edits, considered to be the current state of canon, the conversation with the Emperor mentioned in the original question is altered:

The Emperor: We have a new enemy. The young rebel who destroyed the Death Star. I have no doubt this boy is the offspring of Anakin Skywalker.
Darth Vader: How is that possible?
The Emperor: Search your feelings, Lord Vader. You will know it to be true. He could destroy us.
Darth Vader: He's just a boy. Obi-Wan can no longer help him.
The Emperor: The Force is strong with him. The son of Skywalker must not become a Jedi.

It's strongly implied here that Vader and the Emperor had never discussed Luke up until this point. Vader's line "How is that possible?" could originally have meant anything from that he didn't know previously, to that he had guessed but didn't understand the particulars given that he'd thought he'd killed Padmé on the landing platform, to that he wanted to pretend that he hadn't known and was "playing along" the same way that the Emperor was referring to Anakin Skywalker as a third party, to that he knew the Emperor hadn't known and wanted to hide the fact that he, Vader, had known. This new information eliminates the first interpretation, but the exact meaning of Vader's "how is that possible" is still up to speculation as of issue 6 of the comic series.

In the new Disney/Marvel canon, in which all new comics, books, and games are considered to have the same level of canon as the movies, Vader has his first direct confrontation with Luke between Episodes IV and V, but doesn't know who he is. This is shown in Marvel's monthly comic series Star Wars. In Issue #2, after taking Luke's lightsaber, Vader takes a closer look at it and realizes it used to be his own.

Marvel Star Wars (2015) #2

enter image description here

Vader is suspicious that Obi-Wan was hiding something, but he doesn't yet realize that Luke is his son (he doesn't learn his name in this scene). It doesn't rule out the possibility that Obi-Wan gave his old apprentice's lightsaber to some random guy he found and trained.

But in Issue 6, Boba Fett learns the name of the young wannabe-Jedi that blew up the Death Star. He relays this information to Vader.

enter image description here

enter image description here

Suffice to say, he's not pleased.

enter image description here

Later, in Issue 6 of Marvel's Darth Vader comic series, this scene is shown again and expanded upon. Vader makes the immediate connection to Padme and having been lied to by the Emperor about the exact circumstances of her death. He makes a hologram call to the Emperor similar to the one in TESB:

The Emperor: Yes, Vader? Ah... I sense your anger. Great anger. Have you something to say? Some proud, defiant words? Or are you wise enough to know your place?

(beat)

Darth Vader: I am angry. You would not have me otherwise. My anger brought me to you. I want you to know--I will not fail. And I understand us precisely.

It's worth noting that in the 2004 DVD and 2011 Blu-ray edits, considered to be the current state of canon, the conversation with the Emperor mentioned in the original question is altered:

The Emperor: We have a new enemy. The young rebel who destroyed the Death Star. I have no doubt this boy is the offspring of Anakin Skywalker.
Darth Vader: How is that possible?
The Emperor: Search your feelings, Lord Vader. You will know it to be true. He could destroy us.
Darth Vader: He's just a boy. Obi-Wan can no longer help him.
The Emperor: The Force is strong with him. The son of Skywalker must not become a Jedi.

It's strongly implied here that Vader and the Emperor had never discussed Luke up until this point. Vader's line "How is that possible?" could originally have meant anything from that he didn't know previously, to that he had guessed but didn't understand the particulars given that he'd thought he'd killed Padmé on the landing platform, to that he wanted to pretend that he hadn't known and was "playing along" the same way that the Emperor was referring to Anakin Skywalker as a third party, to that he knew the Emperor hadn't known and wanted to hide the fact that he, Vader, had known. This new information eliminates the first interpretation, but the exact meaning of Vader's "how is that possible" is still up to speculation as of issue 6 of the comic series.

minor rewording
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Milo P
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Clarifying, based on the comments, that Vader didn't realize that Luke was his son during their first appearance
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Thunderforge
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added 96 characters in body
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Milo P
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Rewrite after having read DV #6
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Milo P
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added 499 characters in body
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Valorum
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added 51 characters in body
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Milo P
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Edit for summary (thanks, phantom42!)
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Milo P
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clarification and additional detail from TESB
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Milo P
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added 36 characters in body
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Milo P
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deleted 71 characters in body
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Valorum
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Milo P
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