The Sun

Front

What percentage of the Solar System does the Sun occupy?

Back

The Sun takes up 99.8% of the Solar System.

Front

What type of galaxy has a bulging center and one or more arms?

Back

Spiral galaxy.

Front

Are galaxies spread evenly throughout space?

Back

No, galaxies are not spread evenly throughout space.

Front

What are large loops on the surface of the sun that release a large amount of energy called?

Back

Prominences.

Front

What type of galaxy has no definite shape?

Back

Irregular galaxy.

Front

What is the outermost layer of the Sun's atmosphere called?

Back

Corona.

Front

What is the layer of the Sun that we see and is responsible for its brightness?

Back

Photosphere.

Front

What are sunspots?

Back

Dark spots on the Sun's surface caused by magnetic activity.

Front

What is the process called that powers the Sun?

Back

Nuclear fusion.

Front

What is the temperature at the core of the Sun?

Back

Approximately 15 million degrees Celsius.