1.
What device first proved that Earth rotates on its axis
2.
Which planet has a moon almost as big as the planet itself
3.
First american woman in space
4.
Made the historic walk on the moon in 1969
5.
Only one planet in the solar system has a day which lasts longer than its year
6.
the name of pluto's moon
7.
What division is found between two rings of saturn
8.
First black american astronaut in space
9.
Word meaning "around the sun"
10.
The liquid in the ocean of Triton
11.
the first man to classify stars according to their brightness
12.
the solstice on june 21
13.
What is the star nearest to the sun
14.
The greatest distance of a planet from the sun is called
15.
What is the name given to very bright meteors or bolides
16.
main gas in Mars' atmosphere
17.
the planet whose mass is greater than the combined mass of all the other planets
18.
a moon feature named Copernicus
20.
another moonless planet
21.
which season is Pegasus typically viewed in N america
22.
the constellation for the star Vega
23.
the brightest star in Taurus
