The study of Geology is the study of the Earth. The Earth is the fourth planet away from the Sun .
You may want to read our free ebook The Solar System for a brief introduction to this topic.
The Solar System is the sun and everything that orbits or moves around it due to its gravity. It includes:
The sun itself. It is a star made mainly out of hydrogen and helium. It is, by far, the biggest and heaviest celestial body in the Solar System. It contains more than 99.8% of the total mass of the Solar System. It is not passive, it has flares and coronal mass ejections which are powerful eruptions of plasma on the Sun’s surface. These eruptions can have widespread impacts on Earth.
The planet Earth, the Moon , other planets (Mercury, Venus, Mars, Jupiter, Saturn, Uranus, Neptune, and Pluto) and their satellites.
Celestia is a real-time space simulation that lets you explore our universe in three dimensions. It is free, open source and multiplatform.
Cometsare small and icy celestial bodies that orbit around the sun. They are cosmic snowballs of frozen gases, rock, and dust. When they approach the sun, some of their water vapour and dust begin streaming off forming their long tails.
Do you like astronomy? Read our article Astronomy Free Software that compiles a list of free apps that help you to learn about the Solar System, the Milky Way, and the Universe.