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The answer would be quite detailed, but put simply, by studying the rocks and formations in them we can tell the age of different parts, and seismic events that may have happened there, much the same way as geologists do on Earth.

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16y ago

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How many full moons are in 100 years?

1243 at the moment. The moon is moving away from the earth but as of right now there will be exactly 2486 full moons between 1900-2100. There are 2400 months in those 200 years but 2486 full moons. This means 2486/2400 = 1.03583333 full moons per month or 12.43 full moons per year. Multiply by 1000 = 1243 full moons in a 100 year period. Most sources say there is a full moon every 29.5 days but this is slightly off. At a rate of 29.5 days for each full moon there will be 1238 full moons in 100 years. Perhaps it is the color blue, which causes blindness. After 38 blue moons the person can't see the remaining 5 blue moons in the 100 year period. Whereas scientists tell us the universe only exists because we looked at it, the remaining 5 moons really don't exist if we are blind. So the right answer in this case is 1238 full moons or less, depending when your eyesight goes.


Is the moon similar to other moons in the universe?

Our moon, Luna, is indeed similar to many other moons even in our own solar system, much less the universe as a whole (which has not really be examined in sufficient detail to enable us to catalog moons in other stellar systems).


What can the Doppler effect tell us about in astronomy?

It can tell us whether a star, or a galaxy, is moving towards us or away from us.


What is the role of astronauts in the international space station?

To let us know about what is in space eg: planets moons etc:they also give us power for our lives and homes.


Which planets don't have moons orbiting them?

The planets that have no moons are only Venus and Mercury. Most scientists believe how to get a moon is to break a part off another planet. Earth gots it moon by a large commet hitting it and then it orbits us. The hottest planet in the Solar System is Venus hich doesn't have moon.