Teacher problems

[TheGoldenGriffin]

Its accelerating because of dark energy and its even less understood. When scientist first dicovered that the expansion of the universe was actually accelerating, they couldn't explain it. They used Einstein's old rejected idea to explain it. It was called the cosmological constant. Einstein thought that the universe was static meaning that it stayed the same. When he was working on his theory of general reletivity, he realized that the gravity in space would pull space together and to keep the universe static, there had to be a force that pushes the universe apart and against gravity. The balance of pull and push would keep the universe static. But then Edwin Hubble noticed that the universe was expanding because the galaxies are moving away from us. So Einstein rejected his idea. Now that we learned that the universe is expanding faster, we needed to explain it. To do that, we needed the cosmological constant or dark energy. Dark energy is also dark because we don't know much about it except that is makes up about 70% of space. Dark energy is a property of space and that means even empty space has energy. Space also has the unique property if being able to make more of itself and as a result, more dark force is made. Scientist don't why there is so much dark energy in the first place. But if there were more, the universe would expand so fast, stars and galaxies wouldn't have time to form and there there were less, gravity would cause space to collapse into itself.