8.9 AB HR & Galaxy

Front

What is a nebula?

Back

A collection of dust and gas where stars can form or become when they die.

Front

Which star would you presume has the greatest mass based on apparent brightness?

Back

The star with the largest apparent brightness, which is Star Z.

Front

What type of galaxy is characterized by an elliptical shape?

Back

Elliptical galaxy.

Front

In an HR Diagram, which group of stars has higher than average luminosity and lower than average temperature?

Back

Supergiants.

Front

How does Betelgeuse compare to the Sun in terms of temperature and brightness?

Back

Betelgeuse is cooler and brighter than the Sun.

Front

What is the main characteristic of a supergiant star?

Back

Supergiant stars are very luminous and have a large radius.

Front

What is the significance of the HR Diagram in astronomy?

Back

The HR Diagram plots stars based on their luminosity and temperature, helping to classify them.

Front

What are the main components of a nebula?

Back

Dust and gas.

Front

What does apparent brightness indicate about a star?

Back

It suggests the star's distance and intrinsic luminosity.

Front

What is the difference between a spiral galaxy and an elliptical galaxy?

Back

Spiral galaxies have a flat, rotating disk with arms, while elliptical galaxies are more rounded and lack distinct features.