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Universe's Dark Ages May Not Be Invisible After All
StartsWithABang writes: The Universe had two periods where light was abundant, separated by the cosmic dark ages. The first came at the moment of the hot Big Bang, as the Universe was flooded with (among the matter, antimatter and everything else imaginable) a sea of high-energy photons, including a large amount of visible light. As the Universe expanded and cooled, eventually the cosmic microwave background was emitted, leaving behind the barely visible, cooling photons. It took between 50 and 100 million years for the first stars to turn on, so in between these two epochs of the Universe being flooded with light, we had the dark ages. Yet the dark ages may not be totally invisible, as the forbidden spin-flip-transition of hydrogen may illuminate this time period after all.
There are so many of these crappy articles every day that I've just started ignoring anything that "starts with a bang".
It's such a shame what has become of slashdot lately.
We speculated the Sun contains helium, we tested that in the 19th century. Why can't we use the same methods for other stars, and by extension, everything?
We tested that? Did someone go to the Sun, breathe some solar matter in, and talk in a squeaky voice? I think you mean we tested a test of a test of a test that seems to point toward the likelihood of the Sun containing helium, and that's the best guess we have.