Components of the Universe

Front

What is a nebula?

Back

A nebula is a giant cloud of dust and gas in space, where star formation begins.

Front

What are white dwarfs?

Back

White dwarfs are small, dense stars that are the remnants of stars that have exhausted their nuclear fuel.

Front

What is the Hertzsprung-Russell diagram?

Back

The Hertzsprung-Russell diagram is a scatter plot of stars showing the relationship between their absolute magnitudes or luminosities versus their stellar classifications or effective temperatures.

Front

What type of star is our Sun?

Back

Our Sun is classified as a main-sequence star.

Front

What is a galaxy?

Back

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

Front

What is the nearest star to Earth?

Back

The nearest star to Earth is the Sun.

Front

What are supergiants?

Back

Supergiants are very large stars that are much more massive than the Sun and can undergo supernova explosions.

Front

What is a solar system?

Back

A solar system is a collection of celestial bodies, including a star and the objects that orbit it, such as planets, moons, asteroids, and comets.

Front

What is a protostar?

Back

A protostar is an early stage in the formation of a star, where a cloud of gas and dust begins to collapse under gravity.

Front

What is a main-sequence star?

Back

A main-sequence star is a star that is in the stable phase of its life cycle, fusing hydrogen into helium in its core.