1.5billion years old
Historically, the names of the nine planets in our solar system were Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, and Pluto. However, Pluto is no longer considered a planet, so there are now only eight planets in the solar system.
Like Earth, Venus has volcanic mountains and other features that are probably made of thin, runny lava, on Venus the volcanos sometimes spew out sulfur into the atmosphere, although there is no proof Venus is volcanically active, scientists believe it most likely is. On Mars there are large shields of volcanoes similar to those on Venus and Earth,as well as cone-shaped volcanoes and lava flows, some of these volcaoes are significantly bigger than Earth's volcanoes, such as Olympus Mons, which is 3 times the size of Mount Everest, but none of these are volcanically active.
In the original suite by Holst, there are seven movements: Mars, the Bringer of War; Venus, the Bringer of Peace; Mercury, the Winged Messenger; Jupiter, the Bringer of Jollity; Saturn, the Bringer of Old Age; Uranus, the Magician; and Neptune, the Mystic. The movements are ordered in the planets' increasing distances from Earth. When Pluto was discovered in 1930, Holst did not write a movement for it. However, in 2000, Collin Matthews was hired to write a movement for Pluto. He named it "Pluto, the Renewer". Now that Pluto is no longer a planet, the suite is once again complete.
One that we know of; our own. We had hoped to find some traces of life on Mars, but if there ever was any, it probably all died a billion years ago when Mars lost its supposed atmosphere. (These are guesses, of course.) It's unlikely that there is any life on any of the other planets in our solar system. Moons, you say? It's remotely possible that some kind of life may exist in the oceans that we suspect may exist beneath the icy frozen surface of Jupiter's moon Europa, or even more remotely, on Saturn's moon Titan. (Did you hear all those "weasel words" like "might", "perhaps", and "may"? All guesswork at this point.) Given that we've discovered a difficult-to-believe number of planets orbiting other stars, and that there are probably a TRILLION stars in our solar system, there may be anywhere from a billion to several trillion planets in the Milky Way. It would be tough to believe that NONE of them host any kind of life.
A galaxy. Our Milky Way galaxy is home to billions of stars, our sun being one of them. To make you feel even smaller, there are billions of galaxies of all shapes and sizes. It is said that a galaxy more than likely has to be shaped a certain way in order to sustain life. This could be a requirement due to the gravitational center all galaxies have called a Black Hole. Yes- even at the center of the Milky Way lies a hungry Black Hole. The forces of all the stars and planents and other bodies counter the effects of the Black Hole keeping us in our perfect spot near the edge. But NOT TOO close to the edge to be subject to stellar masses that could smash us apart. -- Yea this Earth is pretty special, and quite lucky!
Mars.
The one with no moon
Gravity
there are 3 active volcanoes
yes aliens :)
Because they "wander" through the sky....
rocks, the other planents
the gas giants and the outer planents
600 volcanoes are active today!!! that's not dat much!
they are made by rocks and gas pressure and gas
Pluto, Ceres, Eris, Makemake. New ones are being added all the time.
orbits around planents or burn up as it gets close to the sun.