Aug 25, 2015
Sci-Tech Universe: Black Holes are Escapable, Hawking Says
Posted by Shailesh Prasad in category: cosmology
Matter that drops into a black hole is gone forever, right? Not so, declares Stephen Hawking.
Archive for the ‘cosmology’ category: Page 417
Aug 25, 2015
Stephen Hawking believes he knows how information escapes black holes
Posted by Sean Brazell in category: cosmology
Brace yourselves: winter is coming. And by winter I mean the slow heat-death of the Universe, and by brace yourselves I mean don’t get terribly concerned because the process will take a very, very, very long time. (But still, it’s coming.)
Based on findings from the Galaxy and Mass Assembly (GAMA) project, which used seven of the world’s most powerful telescopes to observe the sky in a wide array of electromagnetic wavelengths, the energy output of the nearby Universe (currently estimated to be ~13.82 billion years old) is currently half of what it was “only” 2 billion years ago — and it’s still decreasing.
“The Universe has basically plonked itself down on the sofa, pulled up a blanket and is about to nod off for an eternal doze,” said Professor Simon Driver from the International Centre for Radio Astronomy Research (ICRAR) in Western Australia, head of the nearly 100-member international research team.
Aug 11, 2015
Slow death of Universe confirmed with precision
Posted by Philip Raymond in categories: astronomy, cosmology, gravity, physics, space
- The universe radiates only half as much energy as 2 billion years ago
- New findings establish cosmos’ decline with unprecedented precision
From CNN—The universe came in with the biggest bang ever. But now, with a drooping fizzle, it is in its swan song. The conclusion of a new astronomical study pulls no punches on this: “The Universe is slowly dying,” it reads.
Astronomers have believed as much for years, but the new findings establish the cosmos’ decline with unprecedented precision. An international team of 100 scientists used data from the world’s most powerful telescopes — based on land and in space — to study energy coming from more than 200,000 galaxies in a large sliver of the observable universe. [Full story below or at CNN.com]…
Based on those observations, they have confirmed the cosmos is radiating only half as much energy as it was 2 billion years ago. The astronomers published their study on Monday on the website of the European Southern Observatory.
The team checked the energy across a broad spectrum of lightwaves and other electromagnetic radiation and says it is fading through all wavelengths, from ultraviolet to far infrared.
Continue reading “Slow death of Universe confirmed with precision” »
Jul 28, 2015
How to Use a Black Hole’s Spin to Harvest Energy
Posted by Sean Brazell in categories: cosmology, energy
A black hole isn’t the energy sink you might think it is. By hurling matter towards a black hole, it might be possible to get energy out of it. Learn how a spinning black hole could be an energy turbine for an entire civilization.
Jul 28, 2015
Astronomers Discover a New Class of Freakishly Dense, Compact Galaxies
Posted by Sean Brazell in category: cosmology
Imagine what our night sky would look like if its stellar density was a million times greater than it is now. Remarkably, such places actually exist: They’re called “Ultracompact Dwarfs,” and astronomers are calling them an entirely new kind of galaxy.
Jul 27, 2015
Here’s the only way to destroy a black hole
Posted by Sean Brazell in category: cosmology
Jul 24, 2015
China is Building an Absolutely Massive Radio Telescope
Posted by Sean Brazell in categories: alien life, cosmology
Construction is well underway on what will become the world’s largest radio telescope. Once complete, the half-kilometer-wide dish will explore the origins of the Universe and scour the skies for signs of extraterrestrial intelligence.
Jul 8, 2015
Using the gravity of the universe to peer into a black hole
Posted by Sean Brazell in categories: cosmology, space
Researchers at the European Space Agency harness the natural lensing properties of cosmic gravity to get a closer look at a black hole.
Jul 7, 2015
Hidden supermassive black holes revealed
Posted by Sean Brazell in categories: cosmology, futurism, space
An artist’s illustration of a signs of a supermassive black hole actively feasting on its surroundings. The central black hole is hidden from direct view by a thick layer of encircling gas and dust. (credit: NASA/ESA)
