The Solar System
Space facts & science
Space Explorers & Objects
Space vocabulary
100
This is the name of the burning star at the very center of our Solar System.
The Sun
100
What colorful sky glow occurs when charged particles from the Sun interact with Earth’s magnetic field?
Aurora borealis
100
What NASA mission successfully carried the first humans to the surface of the Moon in 1969?
Apolo 11
100
Force that pulls objects toward each other and keeps planets circling the Sun.
Gravity
200
This is the name of the planet we live on.
Earth
200
It is the name given to any human-made object orbiting Earth that no longer serves a useful purpose.
Space junk
200
Who is this astronaut, and what major accomplishment is he known for?
He's Neil Armstrong. He was the first human to walk on the Moon.
200
A tall round vehicle that flies into space.
Rocket
300
This is the biggest planet in our Solar System.
Jupiter
300
What type of eclipse is shown in this image?
Total solar eclipse
300
What orbiting laboratory has been continuously inhabited since 2000 and serves as a joint project between multiple nations?
The International Space Station
300
A sphere of hot gas that shines under its own power.
Star
400
This freezing cold planet is the furthest one away from the Sun:
A. Pluto
B. Neptune
B. Neptune
400
These are made of ice and rock and wrap all the way around Saturn.
Rings
400
Moon exploration program led by the United States' NASA, aimed at returning humans to the Moon for the first time after more than 50 years and building a permanent lunar base.
400
The collapsed remnant of a star whose gravity is so great that nothing, not even light, can escape it.
Black hole
500
Which planet is the hottest one in the Solar System?
Venus
500
How many types of galaxies are there?
1. Elliptical Galaxies
2. Spiral Galaxies
3. Lenticular Galaxies
4. Irregular Galaxies
500
What does "NASA" mean?
National Aeronautics and Space Administration
500
Scientists use this unit to measure very long distances in space.
A light-year