Posts Tagged ‘big bang’
[NEWS] Five Universe Today (@universetoday) links: colours, panspermia, Venus, superhabitable worlds
- Brian Koberlein at Universe Today considers the question of what was the first colour in the universe. (Is it orange?)
- Matt Williams at Universe Today considers how comets and other bodies could be exporting life from Earth to the wider galaxy.
- Matt Williams at Universe Today explores one study suggesting Venus could have remained broadly Earth-like for billions of years.
- Matt Williams at Universe Today also notes another story suggesting, based on the nature of the lava of the volcanic highlands of Venus, that world was never warm and wet.
- Fraser Cain at Universe Today took a look at the idea of superhabitable worlds, of worlds better suited to supporting life than Earth.
[LINK] On cosmic inflation, the Big Bang, and Andrei Linde
The new results were announced by a collaboration that includes researchers from the Harvard-Smithsonian Center for Astrophysics, the University of Minnesota, Stanford University, the California Institute of Technology and NASA’s Jet Propulsion Laboratory. The team plans to submit its results to a scientific journal this week, said its leader, John Kovac of Harvard.
For their research, astronomers scanned about 2 percent of the sky for three years with a telescope at the South Pole, chosen for its very dry air to aid in the observations.
They were looking for a specific pattern in light waves within the faint microwave glow left over from the Big Bang. The pattern has long been considered evidence of the rapid growth spurt, known as inflation. Kovac called it “the smoking gun signature of inflation.”
The scientists say the light-wave pattern was caused by gravitational waves, which are ripples in the interweaving of space and time that sprawls through the universe. If confirmed, the new work would be the first detection of such waves from the birth of the universe, which have been called the first tremors of the Big Bang.
Arizona State’s Krauss cautioned that it’s possible that the light-wave pattern is not a sign of inflation, although he stressed that it’s “extremely likely” that it is. It’s “our best hope” for a direct test of whether the rapid growth spurt happened, he said.
The New Yorkergoes into more detail, here too.
What went viral about all this is the video of physicist Andrei Linde, the man who suggested the theory of cosmic inflation in the first place, being informed at his door of the news of his theory’s confirmation.
This joyous video has just under 1.6 million views as of this posting.