National Aeronautics and Space Administrion

Since its inception in 1958, NASA has accomplished many great scientific and technological feats in air and space. NASA technology also has been adapted for many nonaerospace uses by the private sector. NASA remains a leading force in scientific research and in stimulating public interest in aerospace exploration, as well as science and technology in general. Perhaps more importantly, our exploration of space has taught us to view Earth, ourselves, and the universe in a new way. While the tremendous technical and scientific accomplishments of NASA demonstrate vividly that humans can achieve previously inconceivable feats, we also are humbled by the realization that Earth is just a tiny "blue marble" in the cosmos. Check out our "Thinking About NASA History" folder online as an introduction to how history can help you.

Saturday, October 14, 2023

Primordial Cloud

"If a primordial cloud lies close to a much larger protogalaxy that is rapidily forming stars, those stars relentlessly zap the cloud with ultraviolet radiation. This massive input of energy breaks the chemical bonds that bind moleculer hydrogen together, converting the cloud into one of the almost pure atomic hydrogen (H), which is less efficient at radiating away energy. This gas remains hot, meaning it can't fragment to clumps that cool and condense to form stars."

Astronomy Magazine March 2021 "How to Grow a Giant Black Hole" pp. 16-23
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