The Universe and Big Bang Theory

Front

What happens to stars as we move to the left in a diagram of stellar temperature?

Back

Stars get hotter.

Front

What is a galaxy?

Back

A galaxy is billions of stars held together by gravity.

Front

What is the name of the explosion at the death of a massive star?

Back

Supernova.

Front

What is Absolute Brightness?

Back

The brightness a star would have if it were a standard distance from Earth.

Front

What unit do astronomers typically use to measure distances to stars?

Back

Light-years.

Front

What is the Big Bang Theory?

Back

The Big Bang Theory is the leading explanation about how the universe began, suggesting it started from a singular point and expanded.

Front

What is a nebula?

Back

A nebula is a giant cloud of dust and gas in space, often the birthplace of stars.

Front

What is a black hole?

Back

A black hole is a region in space where the gravitational pull is so strong that nothing, not even light, can escape from it.

Front

What is the difference between apparent brightness and absolute brightness?

Back

Apparent brightness is how bright a star appears from Earth, while absolute brightness is how bright it would appear at a standard distance.

Front

What is a supergiant star?

Back

A supergiant star is a very large star that is even more massive than a giant star.