HR Diagram/ Components of The Universe 8.9A

Front

What is a galaxy?

Back

A giant structure that contains dust, gases, and hundreds of billions of stars.

Front

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

Back

Stars get hotter.

Front

What does the Hertzsprung-Russell diagram graph?

Back

Stars' luminosity and temperature.

Front

What determines a star's color?

Back

A star's temperature.

Front

What type of galaxy is characterized by a smooth, featureless shape?

Back

Elliptical galaxy.

Front

What is a nebula?

Back

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

Front

What is the main difference between spiral and elliptical galaxies?

Back

Spiral galaxies have arms that spiral outward, while elliptical galaxies are more rounded and lack distinct features.

Front

What is luminosity in the context of stars?

Back

The total amount of energy emitted by a star per second.

Front

What is the significance of a star's temperature?

Back

It determines the star's color and stage in its life cycle.

Front

What are the three main types of galaxies?

Back

Spiral, elliptical, and irregular.