In Middle Earth, the sun and the moon have designated maiar that move them across the sky. The morning star is a Silmaril flown around by Eärendil.

But I cannot recall any mention of how the stars would move. Do the fixed stars move across the sky in some fashion, or do they remain in the same position relative to the ground?

A fixed firmament seems to contradict Middle Earth being an alternate history of our earth. I think it would also greatly simplify celestial navigation. But on the other hand I cannot think of a way the stars could move without the same special considerations as the sun and the moon.

So when Durin stooped and looked in Mirrormere, And saw a crown of stars appear, was that a fortituous once in a century constellation he witnessed, or would anyone of dwarven height standing in the same spot always see the same stars as gems upon a silver thread, Above the shadows of his head?

Did Tolkien ever explicitly reference a fixed or a mobile firmament?

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    The sun is a star. The sun moves. Ergo: stars move. Dec 14, 2016 at 22:15
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    @GhotiandChips No, the sun is the last fruit of Laurelin, contained in a vessel made by Aule, carried through the sky by the Maia Arien. If a question is about a fictional setting, answering it from an external perspective is not helpful. Oh, and the evening star isn't a star, it's a planet. Oh, and from the perspective of the earth, the sun doesn't move.
    – Werrf
    Dec 14, 2016 at 22:20
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    I took that fact that Venus was given a explicitly different origin from the other "stars" as an indication that it did not move like the regular stars on the firmament--exactly as is observed in the real world.
    – Buzz
    Dec 15, 2016 at 0:07
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    Comments are not for extended discussion; this conversation has been moved to chat.
    – Null
    Dec 15, 2016 at 14:41
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    The answer may differ before and after the fall of Numenor and the reshaping of the world. Arda in the First Age was flat, and the the Sun and Moon were said to pass over and underneath it. Afterwards it was made round, and presumably began to spin. Dec 15, 2016 at 15:23

1 Answer 1


Yes, it appears that the stars moved

In the sense that they changed position in the sky during the course of a night and of a year. It's unclear whether, over longer timescales, the constellations would change and drift, as happens in the real world.

From Fellowship of the Ring, Chapter 3:

Away high in the East swung Remmirath, the Netted Stars, and slowly above the mists red Borgil rose, glowing like a jewel of fire. Then by some shift of airs all the mist was drawn away like a veil, and there leaned up, as he climbed over the rim of the world, the Swordsman of the Sky, Menelvagor with his shining belt.

Emphasis mine; Remmirath is probably the Pleiades, Borgil is likely Betelgeuse or Aldebaran, and Menelvagor is almost certainly Orion. Later...

From Lord of the Rings, Chapter 10:

Peering out, Frodo saw that the night was still clear. The Sickle was swinging bright above the shoulders of Bree-hill.

Notice that all of these descriptions evoke movement - swinging and climbing, just as the stars appear to spin in the sky during a night. Only one star is explicitly stated to be rising, but the similar language in the descriptions of the others suggests they were also climbing.

Durin's Crown

The significance of the crown of stars in Mirrormere was not that Durin looked in and saw a fluke alignment of stars that happened to look like a crown; it was that he looked during the day and saw the crown of stars. Moreover, everyone who looked thereafter saw the same sight - the crown of stars. From Lord of the Rings, Chapter 6:

They stooped over the dark water. At first they could see nothing. Then slowly they saw the forms of the encircling mountains mirrored in a profound blue, and the peaks were like plumes of white flame above them; beyond there was a space of sky. There like jewels sunk in the deep shone glinting stars, though sunlight was in the sky above. Of their own stooping forms no shadow could be seen.

There is an ancient belief that if one stands at the bottom of a deep well/hole/canyon/what have you, the stars are visible even during the day. Very likely this is what Tolkien was referring to with Mirrormere.

The importance of the site, then, was not that Durin looked and saw the stars, it was that the stars remained there. The dwarves, especially those of Durin's line, saw this as a promise that their kingship would endure.

  • Good analysis. I had always assumed that "red" Borgil was Mars (it would not be the only planet to be identified as a star), but it seems I was wrong. Kristine Larsen (a Professor of Physics and Astronomy) has written a paper identifying Borgil as Aldebaran.
    – Blackwood
    Dec 15, 2016 at 1:25
  • I have wondered what the other planets (besides Venus) were in Tolkien's sky.
    – Buzz
    Dec 15, 2016 at 2:55

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