Structure of the Solar System

The time it takes an object to complete 1 rotation

An unscrewed spacecraft sent from Earth to explore objects in space

Rocky objects that orbit the sun in the ______belt. They are found between Mars and Jupiter

Any small object that orbits a larger object

The four largest moons of Jupiter are called_____   _______

The distance form the Earth to the Sun.

Planets closest to the Sun, are made of spheres of rock, and have solid outer layers

A series of space missions designed to send people to the moon

Refers to anything related to the moom

Made of gas, dust, ice and moves around the sun in an oval orbit

A meteoroid that strikes a planet or moon

A vehicle designed to propel itself by  ejecting exhaust gas from one end

What does NASA stand for?

The study of life in the universe

Life that originates outside the Earth

Reusable spacecraft that transport people and materials to and from space

The time it takes an object to travel around the sun once.

A streak of light in Earth's atmosphere made by a glowing meteroid

A small rocky particle that moves through space