How does the sun burn if there is no oxygen in outer space?

Unlike fire on Earth, the sun
 
<p> Unlike fire on Earth, the sun’s heat is not produced by the oxygen-fed combustion of inflammables. Its fierce, hot energy is actually the by-product of nuclear fusion at the core of the star. The sun is about 70 per cent hydrogen in weight. The enormous gravitational force at its core creates a high temperature and a high density that cause hydrogen atoms to fuse together to become helium. Helium is lighter than the four hydrogen atoms required to make it, and the weight difference is released as energy. That energy takes the form of light, comprised mostly of invisible X-rays and gamma rays. The rays bounce about at random for thousands of years, fighting their way through the sun’s dense, 700,000-km radius. Once at the surface, the now-visible spectrum light zips to Earth in eight minutes, making you squint. </p>
Vote it up
11
Like this Article?Vote it up

Advertisement

 
Advertisement

Free E-Book Samplers

Ultimate Book of Knowledge
new
Ultimate Book of Knowledge
The one-stop treasure trove of fascinating facts. How does a touchscreen work? Why does the sky change colour?
Download
Ultimate Book of Vegetables
Foods That Harm Foods That Heal Cookbook
Fix It Yourself
 

 

 
Advertisement

Featured Games

Famous Faces Puzzle Game
Can you match the famous faces? Cannot play the game on iPad/iPhone? Click here for the iPad/iPhone friendly version. Please note, this version
Using business skills and the help of your neighbors, family and friends you can turn the overgrown barnyard into a beautiful and prosperous farm agai
Fight side by side with elves and dwarves against orcs and the forces of evil! Defend your city and become the most powerful lord of all!
Important Information
Customer Care

Shop at our store!

• Books
• DVDs
• Music
• Gifts

Shop Singapore 
Shop Malaysia

 

WIN! WIN!

Your chance to win cash & prizes!
Enter now

Are you a winner?
Click here