# Is there a way to reproduce Earth-like gravity on a spacecraft close to a more massive body such as the sun?

My gut impression is that an orbit would negate the feeling of gravity, and that if gravity were to be felt, it would indicate the orbit is decaying; an orbit, in effect, is the speed (or is it velocity?) at which the pull of gravity is effectively 0. So a passive orbit would be out.

I would imagine that for a person within a spacecraft that's in a decaying orbit to feel ~1g, the spacecraft would need to be actively exerting force away from the gravitational pull to maintain that 1g.

Examples would be:

1. Spacecraft hovering above Earth's surface (not orbiting), with the hovering actively maintained, results in 1g being felt by the passenger.
2. Spacecraft "hovering" at a certain point away from the sun, probably with some kind of decaying(?) orbit actively maintained.

In my mind, the 1st example makes sense.

Something like the 2nd example is what I'm wondering is possible or not.

For answers: I'm mostly looking for a yes/no + expansion|correction.

Bonus points:

• A) I'm assuming the force required to actively maintain such a "hover" with 1g force would be, basically, 1g? (~9.8 m/s?) (and where would mass enter the equation, I wonder..?)
• B) Is there existing verbiage for "an actively maintained decaying orbit"?
• @NathanTuggy is it really artificial gravity, though? :P – wTyeRogers Apr 7 '18 at 15:36
• If you're using thrust continuously to create acceleration that simulates gravity? Yes. (The tag is used for linear and rotational gravity simulators like centrifuges, mostly the latter; it doesn't rely on hypothetical graviton generators or anything like that.) – Nathan Tuggy Apr 7 '18 at 16:05
• However, the continuous thrust wouldn't be to create acceleration, but to negate unwanted acceleration from (natural) gravity. This is in order to not slip further into a gravity well, but to maintain a position in the well where 1g would be felt by the passenger. #artificial-ground? :3 – wTyeRogers Apr 7 '18 at 16:11
• I'm having trouble figuring out what you are asking in your part 2. "Hovering" in a "decaying orbit"? Can you clarify / think through what you are actually wanting an answer to? – Organic Marble Apr 7 '18 at 17:06
• When you sit in a chair at home, the chair produces a 1g force, creating an acceleration which balances the Earth's pull. If it did not (and neither did the floor, ground, etc.), you would be in free-fall toward the Earth's center. Ok, semantically this is still wrong; technically the Earth does not "pull". – bitchaser Apr 8 '18 at 19:51