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Questions tagged [gravity]

Gravity is the force that attracts a body toward the center of the Earth, or toward any other physical body having mass.

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40 votes
3 answers
12k views

Interstellar: non-breaking waves on Miller

When watching the part where they go down to Miller, I was bothered by the fact that the waves didn't break despite the fact that the water level is ostensibly only knee-deep (roughly, a wave starts ...
Koldito's user avatar
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32 votes
3 answers
6k views

Why is the helicopter in Rama (Arthur C. Clarke) subject to gravity?

In "Rendez-vous with Rama" by Arthur C. Clarke, an artificial gravity force is maintained in the O'Neil cylinder (thanks to its spin). However, according to my understanding of the centrifugal force, ...
Evariste's user avatar
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21 votes
9 answers
5k views

In science fiction, which planet with lifeforms has the largest gravitational force?

I've just started reading Foundation and Gaal Dornick has landed on Trantor for the first time and notices that: The air seemed thicker here, the gravity a bit greater, than on his home planet of ...
camden_kid's user avatar
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21 votes
6 answers
18k views

How do all the planets in the Star Wars universe contain breathable atmosphere and Earth gravity?

All sorts of different species inhabit the Star Wars universe. How is it that their biological function is compatible with the same atmospheric gases, and that the gravity is the same on all the ...
Stacie Swaney's user avatar
20 votes
4 answers
4k views

What's the technical explanation for gravity to exist inside a spacecraft in science fiction? [closed]

Specifically, spacecraft that are not obviously using centrifugal force to simulate gravity the way that the space station from 2001 does.
enon's user avatar
  • 351
19 votes
1 answer
2k views

Short story- crashed pilot must run/jump around a small planet to catch the sun and charge her life supporting suit

I'm looking for a short sci-fi story of a pilot who crashed with her spaceship on a small, low gravitate planet or asteroid. In order to survive she must run/jump around it to catch the sun and power ...
Yonatan's user avatar
  • 193
19 votes
4 answers
2k views

Does the front door of the TARDIS always open up to the control room?

In all of the episodes of Doctor Who that I've seen the TARDIS' front door opens up to the control room. However, it would seem that given the TARDIS' capabilities it would be possible for the door to ...
gnovice's user avatar
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17 votes
2 answers
3k views

Is there any explanation as to why small scale vehicles—such as X-Wings and T.I.E. fighters—in “Star Wars” have gravity?

I realize there are questions focusing on how gravity works on the Death Star as well as moderate sized spacecraft like the Millennium Falcon—where you can stand up and walk around them—in the Star ...
Giacomo1968's user avatar
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15 votes
7 answers
51k views

Is the Melancholia "Dance of Death" possible? [closed]

In the movie Melancholia, one of the characters finds this diagram on the internet showing the planet approaching, passing, and then slingshotting around to hit earth. In the end, that seems to be ...
zipquincy's user avatar
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14 votes
5 answers
3k views

What was the first example of a heavy worlder having fast reaction times?

In Gordon R. Dickson's Hour of the Horde, an individual from a heavy world is presented as molded by its home to be faster due to the reaction time required from falling faster. While many science ...
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13 votes
6 answers
5k views

How does a Dyson Sphere's inhabitants deal without gravity? [closed]

It's well known that because the gravitational attaction at one point on the inside of a hollow shell is zero, because it is cancelled by the attraction from all the other points on the interior. ...
AncientSwordRage's user avatar
11 votes
1 answer
725 views

How did Captain Picard and Worf stay in their seats while upside down in Insurrection?

In Star Trek Insurrection we see Captain Picard and Worf spinning upside down repeatedly while flying in an atmosphere in a shuttle and trying to capture Data. After they even out, Worf gets up and ...
Kalamane's user avatar
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10 votes
2 answers
2k views

Changing gravity in Moon (2009 film) - simply a mistake or was there an explanation?

Last night I watched Moon and it struck me that the gravity seemed to change depending on Sam's location: On the Moon's surface, gravity seemed to be as expected, as evidenced by Sam's slow movement. ...
Reinstate Monica - Goodbye SE's user avatar
10 votes
1 answer
355 views

Soft as a rock bed on the moon, seeking source & quote

I recall reading a book maybe 20 years ago; two people on the moon went to a low budget overnight accommodation. The beds are stone shelves. One says to the other something like in the moons low ...
James Jenkins's user avatar
10 votes
1 answer
1k views

Autistic Child creates anti-gravity device

What is the name/author/publication of a science fiction, very short story, about an autistic child who is observed to create an anti-gravity machine from junk in his back yard, then dismantles it.
Bryan Barnes's user avatar
9 votes
10 answers
6k views

Why is gravity pulling the crew down they're in freefall?

In Into Darkness, there's a scene where the Enterprise enters the atmosphere of a planet, During their descent, the crew members fall in all different directions through the ship and it seems to ...
John's user avatar
  • 306
9 votes
1 answer
546 views

Boy born in space needing to somersault and spin to counteract earth's rotation

What is the title of the book I read in the 1960s or 1970s about a boy that somersaulted and spun throughout the day? As he grew it became worse. The boy claimed he had a need to do this to feel ...
allincomfre's user avatar
8 votes
2 answers
928 views

Niven's "Neutron Star:" plausibility of premise?

It's been a long time since I read the Larry Niven story "Neutron Star," so I'm relying mainly on the Wikipedia article (linked). The body of my question is hidden behind spoiler tags because there's ...
user avatar
8 votes
2 answers
5k views

In The Expanse, how does rotating Eros create gravity?

On various occasions in The Expanse TV series, it's mentioned that the asteroid Eros has artificial gravity. As explained in-universe, the gravity comes from rotation. This is especially mentioned on ...
hitchhiker's user avatar
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8 votes
1 answer
2k views

How fast did Babylon 5 spin or what was the highest gravity level on board?

Babylon 5 had a diameter of 840 meters. If the gravity was 1g, it would have to spin approximately 1.5 times per minute. How fast did it spin or what was the actual "gravity" on board? Are there any ...
MartinTeeVarga's user avatar
8 votes
1 answer
965 views

1980s/1990s SF novel about space marines from a heavy gravity planet?

I'm trying to remember the title of a hard SF novel I read in the early 1990s. The story featured space marines from a heavy gravity planet. Because of the environment they grew up and trained in, ...
Chris Peterson's user avatar
8 votes
1 answer
413 views

Identify a short story where two astronauts on an orbiting platform are having a dispute [duplicate]

I remember reading a short story in the 60/70's where there were two astronauts in spacesuits on an orbiting platform having some sort of dispute. One of them successfully threatens the other to by ...
Wayne's user avatar
  • 81
7 votes
2 answers
2k views

Would John Carter remain strong on a reduced gravity world?

Written by Edgar Rice Burroughs in 1912 and long before space flight, it was stated John Carter would be stronger on Mars than he was on Earth. If he stayed on Mars, would he remain strong, or would ...
Major Stackings's user avatar
7 votes
3 answers
3k views

Did The Expanse break its own rules?

The Expanse is well known for using hard science, and sticking closely to reality when it comes to things like gravity. But, in Season 2, Episode 6, Paradigm Shift: When they perform that action, ...
Tim's user avatar
  • 6,237
7 votes
3 answers
735 views

Independence Day - Why is there gravity in space?

In the 1996 Independence Day movie when we see Jeff Goldblum's and Will Smith's charcters flying into space in order to transmit a virus, there doesn't seem to be anything floating around as you would ...
user35594's user avatar
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6 votes
1 answer
834 views

2001: A Space Odyssey book physics

There's a passage in 2001 that struck me as wrong. They're describing the spinning of the carrousel in Discovery and there's the following quote. The problem of shaving was also solved; there would ...
Robin's user avatar
  • 69
6 votes
2 answers
3k views

How does gravity work on the Icarus?

Sunshine doesn't strike me as the most scientifically inaccurate film, and how it deals with gravity has caught my attention. The Icarus (I & II) seems to have long cylindrical compartments, with ...
Adam Jensen's user avatar
5 votes
1 answer
548 views

Old story about a man whose personal gravity is reversed by a lightning strike

I was refreshing my memory of The Footprints on the Ceiling by Clayton Rawson. First published in 1939. The second of a series of four mystery novels featuring The Great Merlini. (There is also a book ...
Lorendiac's user avatar
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5 votes
1 answer
293 views

What book - boy travels from home city and gets distended by gravity?

I read a very special book a few years back. We follow a boy who lives in a world where, if one moves far enough in a direction, that person gets distended and changed in size. The boy works on ...
VonSchnauzer's user avatar
5 votes
1 answer
727 views

What is the acceleration for different crews in the Expanse?

In the Expanse, gravity is created by accelerating / decelerating the ships. Humans from Earth are used to 1G, inhabitants of Mars about 0.4G and Belters even less. We've seen in S01E01 of the Expanse ...
Shade's user avatar
  • 16k
4 votes
1 answer
1k views

How is Qresh capable of supporting human life?

Season one of the series Killjoys takes place primarily in 'the quad' two known moons (Westerly and Leith) both of which have human populations and a third moon thought to be barren and lifeless (...
Nu'Daq's user avatar
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4 votes
2 answers
392 views

Are there planets with a greater gravitational pull in the Star Wars universe?

In all the movies, humans can walk normally on all planets and moons they visit, as if the gravity was similar everywhere. Is this really so? Are any planets with greater gravity represented? Which ...
greuze's user avatar
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4 votes
0 answers
113 views

Novel with a gravity gun which made the target collapse in on itself and disintegrate

Back in 2011-13, I read a short science fiction novel from the internet on aliens and our interaction with them. In that novel the main weapon of choice was a gravity gun which upon firing would cause ...
Sandeep Singh's user avatar
4 votes
0 answers
239 views

what book is similar to john carter, but hero possessed a green alien's body on low gravity planet

please help me find the name of this book. I read a book when I was young, the human hero's consciousness gets transported to the mind of an alien being on a distant low-G planet. The alien being is ...
rich's user avatar
  • 41
3 votes
3 answers
578 views

Was the idea of a tidal dislocation weapon ever suggested in SciFi? [closed]

In an intense and non uniform gravity field, the various parts of a moving body tend to follow different trajectories, and will unless the whole structure is tied strongly enough to prevent flying ...
babou's user avatar
  • 1,306
3 votes
1 answer
140 views

Story with extraterrestrials, dinosaurs and low gravity Earth

I am looking for a book title and author of a story set in the Jurassic or similar period, with dinosaurs, but also some kind of aliens that resemble ghost. In the story it seems that in the Earth in ...
David's user avatar
  • 143
2 votes
2 answers
500 views

In Dragon's Egg, the effect on time due to extremely high gravity is inconsistent

This has been messing with my head for a while. The Cheela in/on Dragon's Egg book/planet, had their time move much faster, compared to the humans out in the space. This was explained as due to the ...
sharat87's user avatar
  • 147
2 votes
0 answers
890 views

Why Don't People Float while on Starships In Star Wars? [duplicate]

In every scene from Star Wars, where people are in a space shuttle, flying through space, they appear to be under the force of gravity, as if they are on a planet like earth... If they were truly in ...
Jalapeno's user avatar
  • 121
1 vote
3 answers
386 views

Could the disappearance of Gallifrey cause a gravitational anomaly in Kasterborous?

In The Day of the Doctor Gallifrey was frozen in a single moment, practically disappearing from its place for the rest of time. Were the other planets in Kasterborous realigned / rearranged due to the ...
András Hummer's user avatar
1 vote
3 answers
434 views

Do any movies/shows attempt to portray non-Earth, but non-micro gravity?

We've all seen movies and TV shows that portray zero-gravity situations, floating on space stations, etc. And we've all seen movies and TV shows where alien planets are conveniently Earth-like, and ...
Nerrolken's user avatar
  • 38.6k