Looking throughout our universe, we see many fascinating objects and diverse phenomena. Observing over a range of wavelengths and distances, astronomers around the world have detected various planets, some possibly supporting life, as well as twinkling stars, evolving nebulae and clouds of gas and dust, exploding novae, spiraling and rotating galaxies, some colliding with each other, in addition to quasars, blazars, pulsars, comets, and other exotic things. 1,141 more words
Tags » Cosmic Microwave Background Radiation
Discovered in 1965, the cosmic microwave background (CMB) is the most ancient light record in the history of the Universe. Despite being detected as a “noise” across the sky, it did not take long for scientists to realise that this radiation is an incredibly rich source of information about the history of the cosmos, setting them on a search for more and more details in this early cosmic signal. 1,668 more words
The Universe has not always been the sparkling mix of stars and galaxies we live in and observe today. In fact, in its first few minutes, it was an extremely hot and dense jumble of light and particles that has been expanding and cooling down ever since. 1,340 more words
I tweeted this yesterday, but it deserves a blog entry: Gravitational waves discovery now officially dead : Nature News & Comment.
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A team of astronomers that last year reported evidence for gravitational waves from the early Universe has now withdrawn the claim.