All stars create energy in their core through a process called _____

• nuclear fission
• nuclear fusion
• thermal decomposition
• chemical combustion

Most stars are made up of mostly two kinds of gases - _____

• hydrogen and helium
• hydrogen and neon
• oxygen and helium
• oxygen and carbon dioxide

Astronomers sometimes refer to a star's true brightness as its _____

• brilliance
• luminosity
• shine factor
• glossiness

This term means "how bright the star is, as if you were hovering right in front of it"

• true brightness
• apparent brightness
• accurate brightness
• direct brightness

Which term refers to how bright a star appears to us, when observed from Earth?

• true brightness
• apparent brightness
• supposed brightness
• likely brightness

How many Earths could fit inside the Sun?

• 200
• 400
• 400 thousand
• more than a million

Which star is about 400 times bigger than the Sun, and 100,000 times more luminous?

• Polaris
• Vega
• Betelgeuse
• Sirius

The Sun appears so big and bright to us on Earth because ______

• it's the biggest star
• it's the hottest star
• it's so close to us
• it's the most luminous star

Which two factors influence a stars apparent brightness?

• luminosity and its distance from us
• size and luminosity
• mass and its distance from us
• its mass and size

A star is a huge ball of hot gas that makes _____

• sound and light
• heat and sound
• heat and light
• heat and colour