S
The star around which the earth orbits.
Sun
A celestial body moving in an elliptical orbit around a star.
Planet
The branch of science that deals with celestial objects, space, and the physical universe as a whole.
Astronomy
An object consisting of ice and dust; may have a "tail" of gas and dust.
Comet
The planet we live on.
Earth
The sixth planet from the Sun.
Saturn
A dwarf planet in our solar system.
Pluto
A rock orbiting the Sun; may be found in a "belt".
Asteroid
A group of stars that form a pattern.
Constellation
A type of galaxy with a smooth, ellipsoidal shape that ranges from nearly circular to highly stretched out.
Elliptical
Objects that orbit a planet or other body in space, like the Moon orbiting Earth, or man-made objects.
Satellite
The North Star.
Polaris
A person who is trained to travel in a spacecraft.
Astronaut
Second-largest moon of Jupiter.
Callisto
A star in the Pleadies constellation; also a character from the comic book series, Dare Devil.
Electra
A galaxy with a rotating, flat disk with arms that curve out from a central bulge, much like a pinwheel.
Spiral galaxy
This rover studied the geology of Mars.
Perseverence
The NASA mission that first landed a man on the Moon.
Apollo
A constellation; in Greek it means, Greater Dog.
Canis Major
A large, S-type asteroid located in the inner asteroid belt.
Eros
This constellation sits near the center of the Milky Way.
Scorpius
A particle of light.
Photon
The first man to walk on the moon.
Armstrong
This astronomer is often called, the "Father of Modern Astronomy".
Copernicus
Smallest moon of Jupiter.
Europa