Earth is our home planet, and it's the only place in the universe where we know for certain that life exists. Earth formed over 4.5 billion years ago from a swirling cloud of gas and dust squished ...

Read more: The Characteristics Of The Eight Planets The amount of time ... Along with being the outermost planet, the facts about Neptune include that its day is around 57,600 seconds, 1.5 times ...

This extraordinary celestial event will see the sky scattered with seven visible planets in what is known as a great planetary alignment. The eight planets in our solar system orbit the sun in ...

Narrator: As the solar system grew, four rocky planets: Mercury, Venus, Earth and Mars, were created closest to the Sun. Made of rocks and metals, they have solid surfaces and a central core of ...

This latest planetary alignment or "planet parade" - set to take place on the evening of Feb. 28, just after dusk, according to SkyatNightMagazine. Once they are all in place, seven of the eight ...