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Transcript
The Sun The center of our solar system Facts about the Sun • 93 million miles away from earth • 7.25 degree tilt • 4.6 Billion years old • It takes 25 days to rotate around its axis (1 day on Sun=25 earth days) • http://m.youtube.com/watch?v=D2PtPoloR1g The Sun • The Sun is the ONLY star in the solar system and is the center of our universe • A star is very big and produces its own heat and light while a planet shines from reflected light • The Sun is the solar system and it accounts for 99.8% of its mass • One million earths would fit inside it What is it made of? • Like all stars, the Sun is a giant ball of gas • It is held together and squeezed by its own gravity • 98% of the Sun is made of hydrogen and helium What makes it so hot? • The Sun is over 15 million degrees Celsius at the core at 6,000 degrees at surface • It is hot because of it contains a lot of mass • So much matter is pushing to the center of the Sun and this is what causes so much heat • It is a billion billion billion toms of mostly hydrogen gas. If you had that much weight in bananas the same amount of heat would occur Why doesn't the Sun cool off? • The Sun is continually losing heat into space but it does not cool down like a fire • The Sun gets it heat (energy) by a process called nuclear energy • It takes more than 30,000 years for this energy to go from center of the sun to its surface and only 8 minutes until it reaches earth • Early predictions said that the Sun has 5,000 years left until it burns out but it really has 5 billion Solar Wind • Solar wind is a million-mile-an-hour hurricane that blows from the Sun and past its planets • Happens when there is an explosion on the Sun • It takes about 4 days to cross space and reach us • We see small effects of solar winds because our earth has a strong magnetic field that protects us Super hot gases stream away from the Sun The Sun in Religions