Venus is a _____ that revolves around the sun.

An ______ is an imaginary line around which a planet rotates or spins.

An object orbiting another object is a _____.

The 4 planets nearest the sun are called the _______.

A _______ is a rocky object that orbits the sun in a path between Mars and Jupiter.

A _____ _____ is a vehicle sent into space in order to explore places too dangerous or too far away for people to visit.

The path a planet takes around the sun is its _____.

A ____ is a burning ball of gases.

Neptune is one of the four ___ ______.

A _________ is an instrument used to observe different objects.

A _____ is a space object made of ice, dust, and gases.

The five planets on the outer side of the asteroid belt are called the _____ _______.

The moon seems to have different ______ or shapes, during a cycle of 28 days.

A year is the time it takes Earth to make one __________.

A day is the time it takes the earth to make one ________.

The sun provides ____ of the energy to the solar system.

An imaginary line runs through both poles of the planet is its ____.

This type of telescope never has problems seeing through Earth's atmosphere. It uses lenses to enlarge an object.

Trips that people take into space are callled______.