Galaxies and Our Place in the Universe

Front

What is a galaxy?

Back

A galaxy is a vast collection of stars, gas, dust, and dark matter bound together by gravity.

Front

What are the main types of galaxies?

Back

The main types of galaxies are spiral, elliptical, and irregular.

Front

What is a spiral galaxy?

Back

A spiral galaxy is a type of galaxy characterized by its spiral arms that wind outward from the center.

Front

What is the Milky Way?

Back

The Milky Way is the galaxy that contains our solar system, characterized as a barred spiral galaxy.

Front

What is the closest galaxy to the Milky Way?

Back

The closest galaxy to the Milky Way is the Andromeda Galaxy.

Front

What is a void in the context of galaxies?

Back

A void is a large, empty space in the universe where very few galaxies exist.

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 Hubble Space Telescope?

Back

The Hubble Space Telescope has provided deep space images that have greatly expanded our understanding of galaxies and the universe.

Front

What is the role of gravity in galaxies?

Back

Gravity is the force that holds galaxies together, keeping stars and other matter in orbit around the galaxy's center.

Front

What is the difference between a star and a galaxy?

Back

A star is a massive, luminous sphere of plasma, while a galaxy is a collection of billions of stars, along with gas and dust.