Galactic Astronomy – Planets in the Solar System

Milky-WayThis is the study of only the contents in our Milky Way galaxy. This includes the planets, the stars and the sun.   Galactic astronomy also helps us to understand the processes of evolution of galaxies and provide excellent testing sites. Studying the Milky Way allows us to see how stars are formed, the process of stellar evolution and chemical evolution, which are the starting points for planetary systems and aren’t possible to study in other galaxies. Our solar system also consists of 146 moons, comets, asteroids and several dwarf planets such as Pluto, which was denounced as a planet in 2006.
Mercury is the smallest of our planets and also closest to the sun. It is rocky planet and has no moons.
Venus is hot and full of volcanic activity; it is only slightly smaller than earth and also has no moons.
Earth
, our beautiful blue planet, is the only planet in our galaxy to sustain life. It is known as a terrestrial planet and we have only one moon.
Mars has a cold, desert climate and is smaller than earth. It is rocky planet with canyons, volcanoes and polar ice caps and has two moons.
Jupiter is the biggest planet in our solar system and has massive storms with create a swirly cloud-like appearance. Jupiter has dozens of moons. Saturn is the 2nd biggest planet and has rings made of chunks of ice and rocks. It doesn’t have a solid surface, but is made up of hydrogen and helium; it also has 53 moons.
Uranus is the 3rd biggest planet and is made of mostly methane, hydrogen and helium, and has 27 moons.
Neptune is similar in size to Uranus and also made of hydrogen and helium. It is dark and cold, has six rings and 13 moons.