Stars and Galaxies

Front

What is the theory that states the universe began with a huge explosion?

Back

Big Bang Theory

Front

What shape is an elliptical galaxy?

Back

A galaxy with a football shape.

Front

A star moving away from the earth has ___________ shift.

Back

Red shift.

Front

What do we call a large, bright star whose hot core has used most of its hydrogen?

Back

Giant star.

Front

What does Hubble's discovery of red shift with galaxies prove?

Back

The universe is expanding.

Front

What is a light year?

Back

The distance that light travels in one year.

Front

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

Back

Spiral galaxies have arms that spiral outward, while elliptical galaxies are more rounded and lack distinct arms.

Front

What is a supernova?

Back

A powerful and luminous explosion of a star at the end of its life cycle.

Front

What is a pulsar?

Back

A highly magnetized rotating neutron star that emits beams of electromagnetic radiation.

Front

What is the main component of stars?

Back

Hydrogen, which undergoes nuclear fusion to form helium.