Universe & Solar System Models

Front

What is at the middle of a Heliocentric system?

Back

Sun

Front

What is the name of the model where the Earth is at the center?

Back

Geocentric Model

Front

What does the word 'Helio' mean?

Back

Sun

Front

What is a singularity?

Back

An infinitely small, hot area of infinite pressure and density.

Front

What does it mean that the universe is expanding?

Back

The amount of space between galaxies is increasing.

Front

What is the Heliocentric Model?

Back

A model of the solar system where the Sun is at the center and planets orbit around it.

Front

What is the Geocentric Model?

Back

A model of the solar system where the Earth is at the center and everything else orbits around it.

Front

What is a galaxy?

Back

A large system of stars, gas, and dust bound together by gravity.

Front

What is a planet?

Back

A celestial body that orbits a star and is large enough to be rounded by its own gravity.

Front

What is a star?

Back

A massive, luminous sphere of plasma held together by gravity, undergoing nuclear fusion.