Components of the Universe

Front

What is the Milky Way galaxy?

Back

The Milky Way galaxy is a spiral galaxy that contains our solar system.

Front

What are the characteristics used to classify stars?

Back

Stars are classified based on size, brightness, and temperature.

Front

What does an H-R diagram show?

Back

An H-R diagram shows the relationship between a star's surface temperature and absolute brightness.

Front

What is Newton's 1st Law of Motion?

Back

Newton's 1st Law states that an object at rest stays at rest, and an object in motion stays in motion unless acted upon by a net external force.

Front

What is a spiral galaxy?

Back

A spiral galaxy is a type of galaxy characterized by its spiral arms that wind outward from the center.

Front

What is absolute brightness?

Back

Absolute brightness is the measure of how bright a star would appear if it were placed at a standard distance of 10 parsecs from Earth.

Front

What is apparent brightness?

Back

Apparent brightness is how bright a star appears from Earth, which can be affected by distance and interstellar material.

Front

What is a globular cluster?

Back

A globular cluster is a spherical collection of stars that orbits a galaxy's core.

Front

What is an elliptical galaxy?

Back

An elliptical galaxy is a type of galaxy that has an ellipsoidal shape and lacks the distinct arms of spiral galaxies.

Front

What is a nebula?

Back

A nebula is a giant cloud of dust and gas in space, often the birthplace of stars.