what is the composition of the sun?
(mostly hydrogen and helium)
how many planets are in our solar system?
(the answer is 8 not 9)
Why is Pluto no longer a planet?
(it is part of an asteroid belt and larger objects were found in its same orbit)
Is there gravity in outer space, or on the moon?
(yes, gravity exist everywhere)
Why doesn't the moon just fall like everything else?
(inertia)
What is retrograde?
(when the earth's orbit overcomes another planet's so it appears to move backward)
What is a Black Hole?
(a super dense dead star that has such a high gravity that not even light can escape)
a Neutron star?
(a very dense, but not as dense as the black hole, dead star)
a pulsar?
(a radioactive dead star that rotates very rapidly)
why does the moon have phases?
(it orbits the earth)
What causes an eclipse?
(the moon's shadow passing over and blocking the sun, or the earth's shadow covering the moon)
What is the closest galaxy to our own?
(Andromeda)
What is the closest star?
(sun)
What is the closest star other than the sun?
(Alpha Centauri)
What is the largest star?
(VY Canis Majoris)
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I hope most of these don't overlap with what you've already got.
