Semester Review: Astronomy

Front

What is the solar system?

Back

The solar system is a collection of celestial bodies, including the Sun, planets, moons, asteroids, and comets, that are bound by gravity.

Front

How many planets are in our solar system?

Back

There are 8 recognized planets in our solar system: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune.

Front

What is the Heliocentric Theory?

Back

The Heliocentric Theory is the astronomical model that places the Sun at the center of the solar system, with planets, including Earth, orbiting around it.

Front

What is gravity?

Back

Gravity is a force that attracts two bodies towards each other, depending on their masses and the distance between them.

Front

What is the largest planet in our solar system?

Back

Jupiter is the largest planet in our solar system.

Front

What is a galaxy?

Back

A galaxy is a massive system that consists of stars, star clusters, dust, gas, and dark matter, bound together by gravity.

Front

What is the Milky Way?

Back

The Milky Way is the galaxy that contains our solar system, and it is a barred spiral galaxy.

Front

What is the difference between a planet and a star?

Back

A planet is a celestial body that orbits a star and does not produce its own light, while a star is a massive celestial body that generates light and heat through nuclear fusion.

Front

What is the distance from the Earth to the Sun called?

Back

The distance from the Earth to the Sun is called an Astronomical Unit (AU), which is approximately 93 million miles.

Front

What is the order of celestial bodies from smallest to largest?

Back

The order from smallest to largest is: planet, solar system, galaxy, universe.