Components of the Universe Review

Front

What characteristics are used to classify stars?

Back

Temperature/color and brightness.

Front

Betelgeuse is classified as a ____________ star.

Back

Supergiant.

Front

What happens to stars as we move from left to right on the Hertzsprung-Russell diagram?

Back

Stars get hotter.

Front

What is Proxima Centauri's Star's brightness compared to the sun?

Back

Proxima Centauri's Star is less bright than the sun and has a surface temperature below 3,400 K.

Front

Select the picture that represents a spiral galaxy.

Back

D.

Front

What is a galaxy?

Back

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

Front

What are the three main types of galaxies?

Back

Spiral, elliptical, and irregular.

Front

What is the main sequence in the context of stars?

Back

The main sequence is a continuous and distinctive band of stars that appears on plots of stellar color versus brightness.

Front

What is a white dwarf?

Back

A white dwarf is a small, dense star that is the remnant of a low or medium mass star after it has exhausted its nuclear fuel.

Front

What is a supernova?

Back

A supernova is a powerful and luminous explosion that occurs at the end of a star's life cycle.