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A small rocky body orbiting the sun.
Asteroid
A person who is trained to travel in spacecraft
Astronaut
An expert in astronomy/ a person who studies astronomy
Astronomer
The branch of science that deals with celestial objects, space, and the physical universe as a whole
Astronomy
The envelope of gases that surround a planet
Atmosphere
A celestial object consisting of a nucleus of ice and dust and, when near the sun, ana “tail” of gas and dust particles pointing away from the sun
Comet
The Russian term for “astronaut”
Cosmonaut
A hole in the ground caused by an object from space
Crater
A celestial body resembling a small planet but lacking certain technical criteria that are required for it to be classed as such
Dwarf Planet
The third planet of the Solar System
Earth
A system of billions of stars, together with gas and dust, held together by gravitational attraction
Galaxy
The force that attracts a body toward the center of the Earth, or toward any other physical body having mass
Gravity
The fifth and largest planet in the Solar System
Jupiter
The fourth planet of the Solar System
Mars
The planet that is closest to the Sun
Mercury
A natural satellite of any planet
Moon
