Lesson 1: The Structure of the Universe Review

Front

What type of galaxy is the Milky Way?

Back

The Milky Way is a spiral galaxy.

Front

What is a collection of large and small bodies that orbits the sun?

Back

A collection of large and small bodies that orbits the sun is called the Solar System.

Front

What is not a type of galaxy?

Back

Optical Galaxy is not a type of galaxy.

Front

What is a medium-sized star that is made up of gases?

Back

The Sun is a medium-sized star made up of gases.

Front

How is the Milky Way galaxy described?

Back

The Milky Way is a spiral galaxy shaped like a pinwheel, with a central bulge and spiral arms.

Front

What is a galaxy?

Back

A galaxy is a massive system of stars, stellar remnants, interstellar gas, dust, and dark matter, bound together by gravity.

Front

What are the main types of galaxies?

Back

The main types of galaxies are spiral, elliptical, and irregular.

Front

What is the difference between a star and a planet?

Back

A star emits light and heat through nuclear fusion, while a planet orbits a star and does not emit light.

Front

What is the universe?

Back

The universe is the vast expanse that contains all of space, time, matter, and energy.

Front

What is the role of gravity in galaxies?

Back

Gravity binds stars, gas, and dust together in a galaxy.