Galaxy Formation

Front

What is a galaxy?

Back

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

Front

What are the main components of the Milky Way galaxy?

Back

The Milky Way galaxy contains hundreds of billions of stars, along with planets, nebulae, and black holes.

Front

What is Hubble's Law?

Back

Hubble's Law states that galaxies that are further from Earth are generally moving faster away from Earth than those that are closer.

Front

What type of galaxy is the Milky Way?

Back

The Milky Way is classified as a spiral galaxy.

Front

What is the order of celestial bodies from smallest to largest?

Back

Earth’s moon, Jupiter, sun, red giant star, Milky Way, universe.

Front

What is a spiral galaxy?

Back

A spiral galaxy is a type of galaxy characterized by a flat, rotating disk containing stars, gas, and dust, and often a central concentration of stars known as a bulge.

Front

What is the difference between a nebula and a galaxy?

Back

A nebula is a giant cloud of dust and gas in space, while a galaxy is a large system of stars, gas, dust, and dark matter.

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 significance of the central bulge in a spiral galaxy?

Back

The central bulge is a dense region of stars at the center of a spiral galaxy, often containing older stars and possibly a supermassive black hole.

Front

What are the arms of a spiral galaxy?

Back

The arms of a spiral galaxy are regions of higher density where stars, gas, and dust are concentrated, often appearing as bright, curved structures.