5A: Astronomy Fall Final (2024)

Front

What is a black hole?

Back

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

Front

How do we observe black holes?

Back

We see the light of the stars at its event horizon, which reflects off of objects around the accretion disk.

Front

What type of galaxy is the most abundant in the universe?

Back

Elliptical Galaxy.

Front

Which star has the lowest temperature?

Back

Star C.

Front

What is the zenith?

Back

The point directly above you as you look up from Earth into the sky.

Front

What is a quantitative observation?

Back

An observation that involves a measurable quantity, such as 'The Earth completes one rotation in 24 hours.'

Front

What is the difference between a spiral galaxy and an elliptical galaxy?

Back

Spiral galaxies have a flat, rotating disk with stars, gas, and dust, while elliptical galaxies are more 3D and have a smooth, featureless light profile.

Front

What is the event horizon of a black hole?

Back

The boundary surrounding a black hole beyond which no light or other radiation can escape.

Front

What is the significance of the accretion disk?

Back

The accretion disk is a structure formed by diffused material in orbital motion around a central body, often seen around black holes.

Front

What is a light year?

Back

A unit of distance that represents how far light travels in one year, approximately 5.88 trillion miles.