Questions tagged [moons]

Questions about celestial bodies that orbit another celestial body.

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1answer
1k views

Are there any natural circular orbits?

I just saw How does orbital eccentricity affect positions of Lagrange points $L_4$ and $L_5$? and it questions the difference between circular and elliptical orbits. We know the Moon does not have a ...
5
votes
1answer
189 views

Will JUNO do any science of Jupiter's Moons?

It seems like the primary focus of JUNO is to get a better idea of how Jupiter works. The Science Objectives listed on Wikipedia don't seem to include anything about Jupiter's moons, other than a ...
10
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1answer
333 views

How seriously did astronomers take the idea of a hollow Phobos?

Phobos, the larger moon of Mars, was once theorized to be hollow by Iosif Shklovsky. Plenty of publications reference the idea (such as this snippet from Popular Science), but did anyone take it ...
6
votes
1answer
480 views

What is responsible for the different colors of Iapetus?

Iapetus, one of the moons of Saturn, is known for having two distinct color regions, one bright and the other dark. This was noted as early as the 17th century. This region can be seen below, and even ...
6
votes
3answers
412 views

Does NASA plan to land on Europa?

I recently studied that life may exist on Europa, an icy moon of Jupiter. Does NASA plan to land a spacecraft on Europa to study its environment in the near future?

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