The Life of a Star

http://en.wikipedia.org/wiki/File:The_life_of_Sun-like_stars.jpg

A star is a huge sphere of very hot glowing gas.

The most famous star?

http://en.wikipedia.org/wiki/File:Big_dipper_from_the_kalalau_lookout_at_the_kokee_state_park_in_hawaii.jpg

The Sun is the only star in our solar system A yellow, medium sized star.

Why do you think the sun is so bright and hot on earth compared to the

other stars at night?

http://en.wikipedia.org/wiki/File:Yohkohimage.gif

The other stars are REALLY far away!

Stars are classified according to their temperature and brightness.

Hotter Stars are Blue or White

Cooler Stars are Red or Orange

A young star is called a dwarf star▪ Our Sun is a dwarf star

Older Stars are called Supergiants

Our Sun is an average star. The chart below shows the lifecycle of our sun over billions of years.

http://en.wikipedia.org/wiki/File:Solar_Life_Cycle.svg

Star are formed from giant clouds of dust and gas when a chemical reaction happens.

A Star dies when it expands into a red, super giant and finally runs out of gases to burn.

Billions of

years!

When stars are grouped together we call them constellations.

The big dipper is constellation that we often see. What do you think it looks like?

The Big Dipper forms part of the Great Bear star constellation:

Why do you think they call it this?

The Pole Star.Why?

Orion looks like its legendary namesake: a mighty hunter with a shield, a raised arm, and a sword hanging from his star-jewelled belt.

Orion

Design and name your own constellation!