Write An Essay On Mercury's Surface

Of all terrestrial planets we know of, Mercury's geology is the most unknown. This is because of its closeness to the sun, making human observation via spacecraft and from Earth very difficult. There are many craters on Mercury that are made from a particular impact. There is also balsatic rock and plains which are made in the event of a massive volcanic eruption. There are also vents, made when a magma chamber collapses. Mercury's density has produced a solid iron core that accounts for 60% of its volume. As of 2011, 99% of Mercury's surface has been mapped by NASA. Overall, Mercury's surface has many similarities to the Moon's surface with many plains and craters. The largest crater on Mercury is the Caloris Basin with a diameter of 1550km.

Venus, the second planet from the Sun, is a solid and rocky terrestrial planet. Named by the Romans, it is the third brightest thing in the night sky after the Sun and the Moon and is often called the Morning or Evening Star because these are the times it shines the brightest. The atmosphere of Venus is mostly made of CO2 and sulphuric acid. The surface can be very hard to see because of the thick atmosphere; the pressure on Venus is 92 times stronger than the pressure on Earth. The climate is very unpleasant -
These two moons are heavily cratered and misshapen. Phobos and Deimos are known in Greek mythology as the offspring of Ares and Aphrodite. They were discovered in 1877 by American Asaph Hall. Phobos is larger, 28km long and 20km wide. It has a 10km crater called Stickney. This was Hall's wife's last name - his wife encouraged Asaph to continue with his studies, leading to this particular discovery. Deimos is 16km long and 10km wide. Its largest crater is 2.6km in diameter. Their density is 2000kg per square meter. Phobos is predicted to hit the surface of Mars in a few million