A gaseous body much bigger than anything else in our solar system

Round, orbits the sun, and has cleared out the region of the solar system along its orbit

A natural satellite or celestial body in orbit

The average distance measured from the center of the sun to the center of the Earth, which is about 150,000,000 kilometers

small, mostly rocky bodies, many of which are found in an area between the orbits of Mars and Jupiter

Chunks of rock or dust smaller than asteroids. When entering Earth's atmosphere, their friction with the air creates heat that produces a streak of light

Loose balls of ice and rock that usually have very long, narrow orbits.

The energy transferred through space by electromagnetic waves

The range of wavelengths of electromagnetic waves

The distance between two corresponding parts of a wave, such as the distance between two crests

Electromagnetic radiation that can be seen with the unaided eye

A large cloud of gas and dust in space

A contracting cloud of gas and dust with enough mass to form a star

The brilliant explosion of a dying supergiant star

The blue-white hot core of a star is left behind after its outer layers have expanded and drifted out into space

An optical instrument that forms enlarged images of distant objects

The brightness a star would have if it were at a standard distance from Earth

The brightness of a star as seen from Earth

The initial explosion that resulted in the formation and expansion of the universe

A huge group of single stars, star systems, star clusters, dust and gas bound together by gravity

All of space and everything in it