Stars begin their lives in massive clouds of dust and gas known as nebulas. Gravity pulls this material together until it becomes hot and dense enough for nuclear fusion to occur.
: These are regions of space where gravity is so strong that not even light can escape. stars.7z
: Stars have guided human navigation for millennia and continue to be a primary focus of astrophysical research at institutions like the Harvard & Smithsonian Center for Astrophysics . ZArchiver - Apps on Google Play Stars begin their lives in massive clouds of
: Some neutron stars spin rapidly and emit beams of light that look like regular flashes from Earth. stars.7z