characteristics of the universe

Front

What is a nebula?

Back

A nebula is a large cloud of gas and dust in space, where stars are formed.

Front

Which galaxy is Earth and its solar system a part of?

Back

Earth and its solar system are part of the Milky Way galaxy.

Front

What are stars mainly composed of?

Back

Stars are mainly composed of hot gas, primarily hydrogen and helium.

Front

What happens to stars as we move to the left on the Hertzsprung-Russell diagram?

Back

As we move to the left, stars get hotter.

Front

What is the shape of the Milky Way galaxy?

Back

The Milky Way galaxy has a spiral shape.

Front

What is the Local Group?

Back

The Local Group is a collection of galaxies that includes the Milky Way and its neighboring galaxies.

Front

What is a black hole?

Back

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

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.

Front

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

Back

A spiral galaxy has a flat, rotating disk with arms, while an elliptical galaxy has a more rounded, elongated shape without distinct arms.

Front

What is the significance of the Big Bang theory?

Back

The Big Bang theory explains the origin of the universe, suggesting it began as a singularity and has been expanding ever since.