However, once the fusion furnaces of the first stars and galaxies became widespread across the universe, enough high-energy ultraviolet radiation — photons — were emitted into interstellar space to strip neutral hydrogen atoms of their electrons. Now, rather than being absorbed by these electron-ca...
"And I guess my real thought is how much has come out of what can be seen in the cosmic background radiation," he added. "The real signature we saw was that it was absolutely constant, and now the tiny variations in it have turned out to hold a wealth of information." [Cosmic Infl...
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"A 'DNA library' could consist of actual DNA samples, which might last for many thousands of years if stored dry, in the cold, and protected from radiation," Robert Shapiro, the NYU chemist, told SPACE.com. These samples would be in the form of cells or tissues. "They contain the DNA...
The emission nebula glows from the high-energy radiation of bright, young stars deep within the core. The nebula has many names because it’s said to resemble a swan when inverted, a Greek omega letter and even a horseshoe. Editor's note: If you have an amazing night sky photo you'd ...