Sun
- Located at the center of the Solar System.
- It is a main sequence star.
- It was created from a cloud of interstellar dust and gas called a nebula. The nebula underwent gravitational collpase meaning a trigger like a supernova caused it to become concentrated in the center forming a proto-core. This proto-core has enough mass to attract other materials and increase in size. When it gets bigger and hotter enough to be in equilibrium (the outer pressure balance with inner pressure), then a stable star is born. Planets are byproducts of star formation. They formed in the exterior part of the nebula that didn't become part of the star.
- The sun is hot and electrically charged environment. It consists of multiple magnetic fields that violently interact causing events like solar flares and coronal mass ejections. Since activity from the sun can affect Earth, there is a subject called space weather that studies this. The sun is mostly made of hydrogen and helium. It gets its energy from using hydrogen to create helium. When hydrogen as fuel gets depleted, the sun will change. It will increase in size to become a red giant where it will use helium to make other heavier elements. When fusing elements is no longer possible, the sun will "die" to become a white dwarf.