Glow On

Front

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

Back

nuclear fusion

Front

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

Back

hydrogen and helium

Front

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

Back

luminosity

Front

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

Back

true brightness

Front

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

Back

apparent brightness

Front

How many Earths could fit inside the Sun?

Back

more than a million

Front

Which star is about 400 times bigger than the Sun, and 100,000 times more luminous? Options: Polaris, Vega, Betelgeuse, Sirius

Back

Betelgeuse

Front

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

Back

it's so close to us

Front

Which two factors influence a star's apparent brightness? Options: luminosity and its distance from us, size and luminosity, mass and its distance from us, its mass and size

Back

luminosity and its distance from us

Front

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

Back

heat and light