Our Solar System formed when a massive interstellar molecular cloud collapsed due to gravity. How many years ago did this happen?

Around 4.5 billion years ago, our solar system originated from a thick cloud of interstellar gas and dust. The cloud disintegrated as a result of the shockwave produced by a near supernova. When this dust collided, a solar nebula was formed. Finally, the substance exerted enough pressure on hydrogen atoms that they started to fuse into helium, releasing an enormous quantity of energy. That's how our Sun was born!

Asked by Vasilii Kulev · Last updated 4 years ago · 2.3K views · SOURCE