The Solar System
The largest planet in our solar system.
Jupiter
The name of the galaxy we live in.
Milky Way
This U.S. agency was founded in 1958 to oversee space exploration.
NASA
The pull that keeps planets in orbit around the Sun.
Gravity
A constellation is a group of these that form a picture or pattern in the sky.
Stars
This dwarf planet was reclassified in 2006.
Pluto
A group of billions of stars, gas, and dust held together by gravity is called this.
Galaxy
In 1969, this was the first person to walk on the moon.
Neil Armstrong
When the Moon blocks the Sun’s light, it’s called this kind of eclipse.
Solar eclipse
This constellation’s three bright stars form a famous “belt.”
Orion
This red planet has a giant volcano, Olympus Mons.
Mars
To describe a star's temperature, red stars are coolest while this color of stars are hottest.
Blue
This space telescope, launched in 1990, revolutionized our view of deep space.
Hubble Space Telescope
These colorful lights near the North Pole are caused by particles from the Sun interacting with the Earth's magnetic field.
Aurora Borealis (Northern Lights)
The Big Dipper is found within this constellation, also known as the Great Bear.
Ursa Major
This planet has the shortest orbit around the Sun, completing a “year” in 88 Earth days.
Mercury
Stars are mostly made of these two elements: hydrogen and this.
Helium
The first satellite launched into space by the Soviet Union in 1957 was called this.
Sputnik 1
A “shooting star” is one of these burning up in Earth’s atmosphere.
Meteor
This constellation, named after a queen in Greek mythology, forms a “W” shape in the northern sky.
Cassiopeia
The region beyond Neptune that contains many icy bodies, including Pluto, is called this.
Kuiper Belt
When a star reaches the end of its life and explodes, the explosion is called this.
Supernova
This was the first manned mission to orbit the Moon in 1968.
Apollo 8
A region in space where gravity is so strong that not even light can escape.
Black hole
The zodiac constellations lie along this imaginary line the Sun appears to travel through during the year.
The ecliptic