Components of the universe

Front

What is the Hertzsprung-Russell diagram?

Back

A graphical tool used to classify stars based on their brightness, temperature, and color.

Front

What do all stars start as?

Back

Gas and dust in a nebula.

Front

What is a galaxy?

Back

A system of stars, gas, dust, and dark matter bound together by gravity.

Front

What is a star?

Back

A sphere of matter made of gas, held together by gravity, with a temperature great enough to generate light through nuclear reactions.

Front

What is a nebula?

Back

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

Front

What is the main component of a galaxy?

Back

Stars, gas, dust, and dark matter.

Front

What is the relationship between a star's brightness and its temperature?

Back

Generally, hotter stars are brighter than cooler stars.

Front

What is the significance of the color of a star?

Back

The color indicates the star's temperature; blue stars are hotter, while red stars are cooler.

Front

What is a black hole?

Back

A region in space where the gravitational pull is so strong that nothing, not even light, can escape from it.

Front

What is dark matter?

Back

A form of matter that does not emit light or energy, making it invisible, but it exerts gravitational effects on visible matter.