NASA Universe X

universe  In the first moments after the Big Bang, the universe was extremely hot and dense As the universe cooled, conditions became just right to give rise to the More Stories From the Universe A barred spiral galaxy seen face-on Its many arms and distinct, glowing

Welcome to NASA's Universe of Learning The NASA's Universe of Learning team connects the public to the data, discoveries, and experts that span NASA's Scientific evidence tells us the Universe started with the Big Bang This took place around 14,000 million years ago Over time, the Universe has expanded,

The universe is the sum total of everything that exists–the aggregate of existing matter, radiation, time and space The most easily observable element is In their model, the universe contained Earth at the center, the Sun, the Moon, five planets, and a sphere to which all the stars were attached This idea held