Mercury		the star around which the earth orbits
Venus		a person who is trained to travel in a spacecraft
Earth		the galaxy that contains our Solar System
Mars		an optical instrument designed to make distant objects appear nearer
Jupiter		a dwarf planet in the Kuiper belt
Saturn		the fourth planet from the Sun and the second smallest planet in the Solar System
Uranus		a foreigner, especially one who is not a naturalized citizen of the country where they are living
Neptune		he second planet from the Sun and is the second brightest object in the night sky after the Moon
Sun		3rd planet away from the sun and the planet on which we live
Moon		a small body of matter from outer space that enters the earth's atmosphere, becoming incandescent as a result of friction and appearing as a streak of light
Spaceship		the natural satellite of the earth, (visible mostly at night) by reflected light from the sun
Lightyear		a region of space having a gravitational field so intense that no matter or radiation can escape
Comet		used to travel in space
Pluto		the fifth planet out from the Sun, and two and a half times more massive than all the other planets in the Solar System combined
Meteor		a unit of astronomical distance equivalent to the distance that light travels in one year
Black Hole		the smallest planet in the Solar System and the one closest to the Sun
NASA		7th planet away from the sun
Milky Way		the eighth planet from the Sun and the fourth largest
Asteroid		a fixed luminous point in the night sky that is a large, remote incandescent body like the sun
Alien		a small rocky body orbiting the sun
Star		the sixth planet from the Sun and the second-largest in the Solar System
Telescope		National Aeronautics and Space Administration
Spacesuit		a celestial object consisting of a nucleus of ice and dust and, when near the sun, a “tail” of gas and dust particles pointing away from the sun
Astronaut		a garment designed to allow an astronaut to survive in space