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Astronomy Questions

Astronomy is the science that studies the stars, planets, and other bodies of the heavens. This section is intended to address subjects ranging from the structure of various celestial bodies to the methods scientists use while observing the universe.

What are some good sources for astronomy pictures?

Do the planets and moons in our solar system tend to orbit and rotate in the same plane? If so, what would be the cause of such uniformity? Why do all the planets orbit the Sun in the same direction?

What are the colors of the planets?

Could you please tell me if and when the Moon will drift out of the Earth's gravitational pull, since the Moon is known to be moving away from the Earth at approximately 4 cm a year?

I heard that the days of the week have a connection to astronomy, something about the number of days and their names are connected to the planets. How come there are only seven days though? Shouldn't there be nine since there are nine planets?

What were the ancient Greek names for the original nine planets?

Your site spells the Roman name Jupiter as Iuppiter, but I've seen it spelled as Iu-Pater where Pater means "Father" as in "Paternal." Is Iu-Pater also a name for the planet Jupiter?

NASA keeps saying that Mars had lots of water. What happened to it?

Did people ever live on other planets like Mars?

I heard that some people think Pluto shouldn't be called a planet. Someone also found a new object even bigger than Pluto that may or may not be a planet. It's all so confusing! Can you please explain?

Will the world be hit by an asteroid causing us all to die? I've read about the big rock that will collide with Earth by 2018. How true is that? What will be the consequences of the phenomenon? Please explain as this involves the future of life.

What is the relationship between the universal gravitational constant (G) and the acceleration due to gravity (g)?

How could we hear the astronauts who landed on the Moon in real time? Isn't there a time lapse in the radio waves sent between the Moon and Earth?

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