Galaxies and the Universe Review

Front

What type of galaxy is the Milky Way?

Back

Barred Spiral

Front

What is the Cosmic Microwave Background Radiation?

Back

Leftover heat from the expansion of the universe found everywhere in space.

Front

What does the Milky Way look like in the night sky?

Back

A band of stars and dust across the sky.

Front

How do stars in a galaxy appear to move?

Back

In an orbit around the center of the galaxy.

Front

What is a galaxy?

Back

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

Front

What are the main types of galaxies?

Back

Spiral, Elliptical, and Irregular.

Front

What is the difference between a spiral galaxy and a barred spiral galaxy?

Back

A barred spiral galaxy has a central bar-shaped structure made of stars, while a spiral galaxy does not.

Front

What is dark matter?

Back

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 Cosmic Microwave Background Radiation?

Back

It provides evidence for the Big Bang theory and shows the uniformity of the universe's early state.

Front

What is the role of gravity in galaxies?

Back

Gravity holds galaxies together and governs the motion of stars and other celestial bodies within them.