MySci Unit 23: Stars and Constellations

Front

What happens to the luminosity of a star as its size increases?

Back

As the size of a star increases, its luminosity also increases.

Front

What is luminosity?

Back

Luminosity is the measure of how much energy or light a star shines from its surface.

Front

What is an axis?

Back

An axis is an imaginary line that an object turns or spins on.

Front

What is a constellation?

Back

A constellation is a cluster of stars in the sky that have been grouped together in a pattern.

Front

If it is winter in the Northern Hemisphere, what season is it in Australia?

Back

It is summer in Australia.

Front

What is the main factor that affects a star's luminosity?

Back

The main factor that affects a star's luminosity is its size.

Front

How do we define a star?

Back

A star is a massive, luminous sphere of plasma held together by gravity.

Front

What is the difference between a star and a planet?

Back

A star generates its own light and heat through nuclear fusion, while a planet does not and reflects light from a star.

Front

What is the Milky Way?

Back

The Milky Way is the galaxy that contains our solar system and billions of other stars.

Front

What is the significance of the North Star?

Back

The North Star, or Polaris, is significant because it is located nearly directly above the North Pole and is used for navigation.