ES 30.3/30.4 Review Stars

Front

What is the local group of galaxies that the Milky Way is part of?

Back

The local group contains approximately 30 galaxies.

Front

Which galaxy is Earth located in?

Back

Earth is located in the Milky Way galaxy.

Front

What is the study of the origin, structure, and future of the Universe called?

Back

This study is known as cosmology.

Front

What is the radius of the local group of galaxies that includes the Milky Way?

Back

The radius is approximately 5 million light years.

Front

What event describes the beginning of the Universe where all matter and energy was compressed and then expanded?

Back

This event is known as the Big Bang.

Front

What is the term for the force that is causing the acceleration of the Universe's expansion?

Back

This force is called dark energy.

Front

What is dark matter?

Back

Dark matter is a form of matter that does not emit light or energy, making it invisible and detectable only through its gravitational effects.

Front

What is the observable universe?

Back

The observable universe is the part of the universe that we can see and measure, limited by the speed of light.

Front

What is a galaxy?

Back

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

Front

What is the Milky Way?

Back

The Milky Way is the galaxy that contains our Solar System and is a barred spiral galaxy.