Understanding the Universe Test Review

A spherical object that orbits the Sun and is not a moon of another planet.

• Planet
• Dwarf Planet
• Comet
• Asteroid

The distance that light can travel in one year

• Lightyear
• Astronomical Unit
• Spectroscope
• Telescope

Made of gas, dust, and ice and moves around the Sun in an oval-shaped orbit.

• Planet
• Dwarf Planet
• Comet
• Asteroid

The sun and the group of objects that move around it

• Inner Planets
• Constellations
• Solar System
• Outer Planets

An instrument that collects electromagnetic radiation from the sky and concentrates it for better observation

• Lightyear
• Astronomical Unit
• Spectroscope
• Telescope

Patterns of stars in the night sky.

• Inner Planets
• Constellations
• Solar System
• Outer Planets

Millions of small, rocky objects that orbit the Sun

• Planet
• Dwarf Planet
• Comet
• Asteroid

An instrument that separates light into a spectrum

• Lightyear
• Astronomical Unit
• Spectroscope
• Telescope

An object that orbits the Sun and has a nearly spherical shape.

• Planet
• Dwarf Planet
• Comet
• Asteroid

represents the mean distance between the Earth and our sun.

• Lightyear
• Astronomical Unit
• Spectroscope
• Telescope