1
Which planet spins "on its side," with its axis almost horizontal?
2
About how long does sunlight take to reach Earth?
3
What is the most distant human-made object from Earth?
4
On Venus, one day (a single rotation) lasts longer than its own year. True or false?
5
Which planet is so low in density that it would float in water?
6
Which is the hottest planet in the solar system?
7
What is the name of our galaxy?
8
What is the space telescope launched in 2021, successor to Hubble, called?
9
How many planets are there in the solar system?
10
Which is the largest planet in the solar system?
11
What is the closest star to Earth?
12
What is Earth's natural satellite?
13
What force keeps the planets orbiting the Sun?
14
What is the space object from which not even light can escape called?
15
What is the space station orbiting Earth called?
16
What is the point in a planet's orbit where it is closest to the Sun called?
17
Which moon in the solar system is the only one with a dense atmosphere?
18
Which telescope instrument splits light to study the composition of stars?
19
Which NASA mission first carried humans to orbit the Moon in 1968?
20