The Universe

Front

What is the primary method used to measure the surface temperatures of stars?

Back

Color is used to measure the surface temperatures of stars.

Front

Are White Dwarfs considered hot or cold stars?

Back

White Dwarfs are considered hotter stars.

Front

What are the three main pieces of evidence supporting the Big Bang Theory?

Back

Light Element Abundance, Red Shift of Galaxies, and Cosmic Microwave Background.

Front

What does the term 'Big Bang' refer to in cosmology?

Back

The Big Bang refers to the expansion of the universe from a hot, dense state.

Front

On the HR Diagram, what does it indicate if a star is located closer to the origin on the x-axis?

Back

The star is hotter.

Front

What is the Cosmic Microwave Background?

Back

The Cosmic Microwave Background is the afterglow radiation from the Big Bang, filling the universe.

Front

What is redshift and what does it indicate about galaxies?

Back

Redshift is the phenomenon where light from distant galaxies shifts to longer wavelengths, indicating that the galaxies are moving away from us.

Front

What is the significance of light element abundance in supporting the Big Bang Theory?

Back

The abundance of light elements like hydrogen and helium in the universe supports the predictions made by the Big Bang Theory.

Front

What is the Hertzsprung-Russell (HR) Diagram used for?

Back

The HR Diagram is used to classify stars based on their luminosity and temperature.

Front

What is a White Dwarf?

Back

A White Dwarf is a small, dense star that is the remnant of a star that has exhausted its nuclear fuel.