Impact by asteroids.
Because you study earth and science and astronomy is study of stars and planets. So I think astronomers are a scientist of earth dont you!:)
Hundreds of extra-Solar planets have been detected already.
Sea of Tranquility ("Mare Tranquilitatis", in latin). It's not a real sea, it's only a basalt basin with a lot of craters that the ancient astronomers think it was a sea or an ocean.
I think it was Galileo. Not too sure if he new he was looking at craters though.
Mercury, Venus, Earth, and Mars all have impact craters. Earth's craters are subject to weathering, subduction and orogeny, erasing them from the surface after a time. Mercury is an airless world, geologically inactive, so it has preserved its craters from the beginning of the solar system. Mercury's appearance is most like that of our moon.
Because you study earth and science and astronomy is study of stars and planets. So I think astronomers are a scientist of earth dont you!:)
Because they study many planets and their geography and atmosphere, in Earth Science you study the geology of Earth just like Astronomers study geology of other planets.
early astronomers thought that Mercury was a seprate planet to another because it was so small
Hundreds of extra-Solar planets have been detected already.
No, one cannot be sure.
I think its because they reflect light from the sun at night ( part of earth is Covered by the Moon but is still reflected by the sun's rays.)
Planetesimal formation.
Sea of Tranquility ("Mare Tranquilitatis", in latin). It's not a real sea, it's only a basalt basin with a lot of craters that the ancient astronomers think it was a sea or an ocean.
Because of its minute size and shape, it is wayyyy smaller than the surrounding planets, and also its distance, it was far!
Astronomers think Pluto is a dwarf planet. And they're right.
yes, in 2015 scientists think new planets will be created
well i think the reason why people might like astronomers its because they would like to travel in the planets and learn somethings