What would life be like without the Sun? Could the Earth survive without the heat and light it provides?
Most of us have trouble imagining life without that big, blazing ball of energy. It is the centerpiece of our solar system and a vital factor in the Earth's evolution. Grab your sunscreen and take a look at these sites devoted to this 4.6 billion-year-old star:
Trip Through the Sun
Take a multimedia tour of our nearest star. This site includes images and animations of solar flares, sun spots and solar eclipses. It also explains the sun's influence on the solar system.