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Extraterrestrial Life --"Alternative Biochemistries" (Weekend Feature) In his famous lecture, "Life in the Universe," Stephen Hawking observed that what we normally think of as 'life' is based on chains of carbon atoms, with a few other atoms, such as nitrogen or phosphorous. We can imagine that one might have life with some other chemical basis, such as silicon, "but carbon seems the most favorable case, because it has the richest chemistry."

Current telescopes can only see galaxies about 700 million years old, and only when the galaxy is unusually large or as the result of a big event like a stellar explosion. An international team of scientists led by researchers at Tel Aviv University have developed a new method for detecting galaxies of stars that formed when the universe was in its infancy, during the first 180 million years of its existence. The method is able to observe stars that were previously believed too old to find.

The Rho Ophiuchi Nebula: A Clue to Origin of Earth's Key Molecules? Hydrogen peroxide (H2O2) a key molecule for both astronomers and chemists has been discovered close to the star Rho Ophiuchi, about 400 light-years away.

Monster Black Holes of the Early Universe --"Did They Form Inside Galaxies or Create Them?"

The large-scale structure of the Universe appears to be dominated by vast "hyperclusters" of galaxies, according to the Sloan Digital Sky Su...

Milky Way's Supermassive Black Hole a Million Times Brighter 300 Years Ago (Today's Most Popular)

Eyes and Nebulas

Eyes and Nebulas
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Community Post: The Universe In Us

Eyes and Nebulas

"Our Universe is Merely a Region of an Enormous Universe" --CalBerkeley Physicists (Today's Most Popular)

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35 Astounding And Uplifting Facts About The Universe

Love thinking this way! Brings out powerful thoughts one day I might be a scientist my interest level in this is too high for it's own good!

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A lesson in perspective…

To think we are alone in the universe is both egotistical, and ignorant.