SIZE: 5 Earths
ORBITAL PERIOD: 13 days
DISTANCE: 20.5 light-years

And you thought all you had to worry about was Earth, Pluto, Mars, Venus, and the others. An Exoplanet, also known as an extrasolar planet, is a planet that is beyond the Solar System. As of January 2008, 270 Exoplanets have been detected.
 
Many stars, such as our Sun, have planets, but they are very difficult to discover. So therefore an Exoplanet is a planet that is outside of the solar system and not orbiting our star, the Sun.
Check back frequently for images of various exoplanets that have been found.

Just like people, Stars are born, they grow up, they live and then they eventually die. Stars are born in nebulae. Huge clouds of gas and dust collapse under gravitational forces and then form protostars. These young stars undergo further collapse, forming a main sequence of stars…sounds eerily familiar like a tale of Hollywood starlet.
Stars expand as they grow old. As the core runs out of hydrogen and helium, the core contracts and the outer layer expands, cools, and becomes less bright. This is what Astronomers call a red giant or a red super giant (depending on the initial …read more