Study of the space beyond Earth and of its contents.
Height in space of an object relative to sea level or ground level.
Layer of gases surrounding a star or a planet
Also known as "minor planets"
The opposite to ordinary matter
Chemical element with the symbol Ar
The most distant point from Earth on a satellite's orbit
The point on a planet's elliptical orbit at which it is farthest from the sun
Au is the symbol for gold, but for what is AU an abbreviation
ANSWERS
Astronomy
Altitude
Atmosphere
Asteroids
Antimatter
Argon
Apogee
Aphelion
Astronomical unit (mean distance from the Earth to the Sun; about 93 million miles)
Food on 10/05/2016