您现在的位置是:百科 >>正文
【】
百科4人已围观
简介Radio telescopes have revolutionized the cosmos.Radio wave signals from outer space — first de ...
Radio telescopes have revolutionized the cosmos.
Radio wave signals from outer space — first detected in 1932 by engineer Karl Jansky — show that the tranquil night sky is not tranquil at all. "The sky looks serene and calm, but if you look in the radio bands, extremely energetic phenomena are taking place in the universe," Poonam Chandra, an astronomer at the National Radio Astronomy Observatory in Charlottesville, Virginia, previously told Mashable.
Black holes, exploding stars, forming stars, and beyond, shoot out energy in the form of radio waves into the universe.
Yet one type of radio wave detection remains mysterious, though astronomers have leading theories. These signals are called "fast radio bursts," or FRBs, which are curious pulses of radio waves that last milliseconds, and then vanish. Researchers have now determined the source of the most distant fast radio burst ever detected. It took a whopping 8 billion years to reach Earth.
"In new research published in Science, we have found the most distant fast radio burst ever detected: an 8-billion-year-old pulse that has been travelling for more than half the lifetime of the universe," Ryan Shannon, an astronomer at Swinburne University of Technology in Australia and an author of the research, wrote online.
SEE ALSO:The plan to build a telescope the size of Washington, D.C., on the moonThe researchers found this fast radio burst, dubbed "FRB 20220610A," using the sprawling Australian SKA Pathfinder (ASKAP) radio telescope. Astronomers don't listento radio waves, but use large satellite dishes, or arrays of many satellite dishes, to collect these signals, often coming from far-off galaxies.
This recent quick burst seemed to come from a great distance away, but to confirm, the team followed up on the location of the FBR with the Very Large Telescope, located in the high Chilean mountains. This observatory contains optical telescopes that see visible light, and astronomers indeed located "faint smudges of light" — evidence of an extremely distant galaxy. This light wave had stretched over time as the universe expanded, and that amount of stretching showed it was a whopping 8 billion years old.
"This confirmed that FRB 20220610A had broken the record for the most distant fast radio burst," Shannon said.
![A conception of a fast radio burst traveling from distant galaxies to our Milky Way galaxy.](https://helios-i.mashable.com/imagery/articles/06lEncBwne8kKvjW22g1NLS/images-1.fill.size_2000x985.v1697822481.jpg)
Revealing the mystery of fast radio bursts
Astronomers will continue to sleuth out and investigate fast radio bursts.
Related Stories
- Distant NASA spacecraft captures breathtaking views of volcano world
- The most fascinating star in our sky inches closer to exploding
- The best telescopes for gazing at stars and solar eclipses in 2024
- If a scary asteroid will actually strike Earth, here's how you'll know
- NASA found a surprise when opening its asteroid canister
For one, they want to know where these signals, triggered by powerful or explosive activity, originate. There are two leading possibilities, but many more ideas:
The signals may come from powerful "magnetars," which are a type of neutron star (the collapsed core of a star). Magnetars are profoundly dense, spin, and have the strongest-known magnetic fields.
The merging of massive objects in space, like collapsed stars or black holes, might trigger these radio bursts.
(As always, it should be noted that there's no evidence these fleeting signals come from aliens. After all, it's never aliens.)
![The Very Large Telescope's view of the distant galaxy that emitted FRB 20220610A. The black circle shows the location of the fast radio burst.](https://helios-i.mashable.com/imagery/articles/06lEncBwne8kKvjW22g1NLS/images-2.fill.size_2000x1899.v1697822709.png)
Want more scienceand tech news delivered straight to your inbox? Sign up for Mashable's Light Speed newslettertoday.
The astronomer Shannon also notes that detecting fast radio bursts can reveal insights about our expansive universe, such as its structure. Great clouds of hot gases float between galaxies, but these fast radio bursts slow when passing through these gases, helping reveal what's out therein the great cosmos.
Tags:
转载:欢迎各位朋友分享到网络,但转载请说明文章出处“夫榮妻貴網”。http://new.maomao321.com/news/15a599637.html
相关文章
Cypress Hill and the London Symphony Orchestra seem to be collaborating IRL
百科Thanks to the internet, the wildest dreams of The Simpsonsfans may come true.It seems the London Sym ...
【百科】
阅读更多CNN anchor needs a quick drink to get through Trump's last four weeks
百科Fair warning: If you find yourself suddenly dizzy or if you need to take a quick break by the end of ...
【百科】
阅读更多How closely did you watch this week's 'Game of Thrones'? Take our quiz
百科A lot happened on Sunday's Game of Thronesas characters traversed Westeros, returned, reunited, and ...
【百科】
阅读更多
热门文章
- Rejoice! Oculus Rift owners can now experience the awesomeness of Google Earth VR
- Lisa Frank and Reebok have just created the the '90s sneaker of your dreams
- The most burning 'Game of Thrones' question: Where the eff is Gendry?
- The future of Snapchat is in the dancing hot dog's hands
- Tom Hanks bought reporters an espresso machine because 'those poor bastards need coffee'
- This is the one monument Donald Trump won't defend
最新文章
Look how much smaller Trump's visit from the New England Patriots was than Obama's
Congrats are in order: Malala was just accepted into Oxford
'Game of Thrones' review roundup for 'Eastwatch'
Mercury is in retrograde and Drake is wearing socks with Rihanna on them
Barbershop Books is using barbershops to inspire young black boys to read
Fox News stopped broadcasting in the UK and frankly nobody will miss it anyway