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17 votes
4 answers
4k views

What is the shape of orbit assuming gravity does not depend on distance?

We know that the orbit of the earth is elliptical considering the force of gravity is inversely proportional to the square of the distance. But assume that, gravity does not depend on distance. ...
Arafat's user avatar
  • 171
-1 votes
1 answer
98 views

If 16 million kilometers were added to Earth's semi-major axis, what measurable effect would there be on Mars' orbit?

I have some education in astronomy, but nothing extensive in astrophysics. I can follow mathematical procedure with assistance. Procedural responses are most welcome!
JM Yaden's user avatar
  • 171
1 vote
0 answers
31 views

Virgin Galactic's and Blue Origin's Space Flights - are these just Extended Skydiving in an Enclosure? [closed]

Sorry for three questions in the three paragraphs below, but they all are around the same curiosity that I have. In both of Virgin Galactic and Blue Origin's space flights happening in July 2021, it ...
manisar's user avatar
  • 11
0 votes
1 answer
101 views

Non-keplerian orbit features of orbits in uniform mass distribution

For the first Kepler's law the orbit of a planet is an ellipse, with the Sun in one of the foci, but I've read that in the case of an homogeneous sphere distribution, orbits can be elliptic, but the ...
Martrin's user avatar
  • 21
1 vote
1 answer
129 views

Could a gas giant orbit a star with a 30 year period at a distance of just 1 AU?

Assuming a star with similar properties to our sun, could a gas giant orbit it with an orbital period similar to that of Saturn, but, at a much closer orbital distance, more similar to 1 AU?
orbus's user avatar
  • 19
4 votes
1 answer
664 views

Orbits using Newtons laws

I am making a small orbit simulator. I figured out Kepler's laws and know how to work with them to "update" an orbit based on time. So now I want to know how I can describe orbits with newton laws. ...
GR00G0's user avatar
  • 43