Life Cycle of Stars Crossword

The brightness of a star's light is called
The stars heats up and hydrogen is converted to helium
Huge cold clouds of gas and dust
The earliest stage of a star's life in which the contracting cloud heats up and becomes a
Stars spend most of their lives here as long as hydrogen fuses into helium
Once medium-sized stars run out of nuclear fuel, the star becomes a
Have no fuel, but glow from leftover energy
When a massive star runs out of hydrogen, it becomes a
The explosion of a large star that causes heavier elements to form
These stars form from small supergiants
A place in space where gravity is so great that light can't escape
The most massive stars form ____
A white dwarf that has cooled
Forms from the outer layers of hydrogen and helium that are cast off when a red giant becomes a white dwarf
How long a star lives depends on its
_____________ are rich in hydrogen
_________ use up their fuel more quickly
Stars that have less mass then the sun can live up to ____ billion years
A medium-mass star will live for about ___ billion years
A star that is more massive than the sun may live only about ten _____ years