Life Cycle, HR review

Front

What phase of its life cycle is our Sun currently in?

Back

Main sequence

Front

What are galaxies composed of?

Back

Stars, dust, and gas held together by gravity

Front

How old is our Sun in billion years?

Back

4.6 billion years old

Front

What is a White Dwarf?

Back

A small, very dense star that is typically the size of a planet, formed when a low-mass star exhausts its nuclear fuel and loses its outer layers.

Front

Why do scientists use the electromagnetic spectrum to study stars?

Back

Because the full EM spectrum provides much more information than just visible light from a telescope.

Front

What is a Nebula?

Back

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

Front

What is the life cycle of a star?

Back

The stages a star goes through from formation to death, including nebula, main sequence, red giant, and white dwarf.

Front

What is a Red Giant?

Back

A late phase in a star's life cycle when it expands and cools after exhausting its hydrogen fuel.

Front

What is the electromagnetic spectrum?

Back

The range of all types of electromagnetic radiation, including visible light, radio waves, and X-rays.

Front

What happens to a star after it becomes a White Dwarf?

Back

It gradually cools and fades over billions of years.