characteristics of the universe

Front

What is the main component of the universe that we can see?

Back

Stars.

Front

What are the two main groupings of stars in the universe?

Back

Stars are grouped in galaxies.

Front

Which color of stars is considered the coolest?

Back

Red stars are the coolest.

Front

Where are the dim and cool stars located on the HR diagram?

Back

Bottom right.

Front

List the colors of stars from coolest to hottest.

Back

Red, Yellow, White, Blue.

Front

What is the HR diagram used for?

Back

It is used to classify stars based on their temperature and brightness.

Front

What is a galaxy?

Back

A galaxy is a massive system that contains stars, stellar remnants, interstellar gas, dust, and dark matter.

Front

What is the difference between a star and a planet?

Back

A star generates its own light through nuclear fusion, while a planet does not and reflects light from a star.

Front

What is the temperature range of blue stars?

Back

Blue stars are the hottest, with temperatures exceeding 30,000 degrees Celsius.

Front

What is the life cycle of a star?

Back

A star goes through stages: nebula, main sequence, red giant, and then either a supernova or a white dwarf.