Tech & Science : What’s Better Than One Mysterious Cosmic Signal? - PressFrom - Australia
  •   
  •   

Tech & Science What’s Better Than One Mysterious Cosmic Signal?

04:45  12 january  2019
04:45  12 january  2019 Source:   theatlantic.com

There's a hidden message in the new 'Stranger Things 3' teaser — here's what it could mean

There's a hidden message in the new 'Stranger Things 3' teaser — here's what it could mean "Stranger Things 3" arrives on Netflix this coming July 4. In a new teaser video, the message "when blue and yellow meet in the west" was on a computer screen. This same phrase was found in Morse code inside the "Official Behind-The-Scenes Companion" book released last fall. The phrase could refer to the blue and yellow hands of the clock in Starcourt Mall, a new location in the coming season seen in another teaser video. The final episode of "Stranger Things 3" is called "The Battle of Starcourt," which makes some fans believe the hidden morse code clues are related to a big showdown in the season finale.

The mysterious signals come from all directions in the sky. No one knows exactly what they are, or what causes them, but astronomers have The intergalactic medium is orders of magnitude emptier than the best vacuums in our terrestrial laboratories, but it still has some wisps of cosmic matter.

What ’ s Better Than One Mysterious Cosmic Signal ? The author is best known for arguing that emotional connection could help heal America’s racial divides. But his 1974 novel "If Beale Street Could Talk" focused instead on the bonds that held black people together.

What’s Better Than One Mysterious Cosmic Signal? © NASA / ESA / STScI A gleaming nebula of stars

The mysterious signals come from all directions in the sky.

Astronomers don’t know exactly what they are, or what causes them, but they have detected dozens over the past decade. The signals, known as fast radio bursts, originate from deep within the cosmos, well beyond the Milky Way galaxy. The radio waves travel across space for billions of years, moving at the speed of light. When they reach Earth’s telescopes, they make a brief and powerful appearance. For a few milliseconds, the bursts shine with the intensity of an entire galaxy. And then they’re gone.

Of the more than 50 recorded fast radio bursts, or FRBs, astronomers have a favorite: FRB 121102, named for the date of its discovery six years ago. Unlike other fast radio bursts, this one repeats. Telescopes have observed blindingly bright flashes coming from the same point in the sky over and over, sometimes several times in less than a minute. The signal’s quirky nature has allowed astronomers to study it in more detail, to mine each flash for different kinds of information and even pinpoint its location in a small galaxy about 3 billion light-years from Earth.

Earth Just Made Its Closest Approach to the Sun

Earth Just Made Its Closest Approach to the Sun Earth reached perihelion at 2:19 am EDT Thursday, January 3.

What ’ s Better Than One Mysterious Cosmic Signal ? Marina Koren. What ’ s Better Than One Mysterious Cosmic Signal ? Technology. Teens Are Spamming Instagram to Fight an Apparent Network of Child Porn.

What ’ s Better Than One Mysterious Cosmic Signal ? No one knows exactly what they are, or what causes them, but astronomers have detected dozens over the past decade. The signals , known as fast radio bursts, originate from deep within the cosmos , well beyond the Milky Way galaxy.

Despite the nondescript name, FRB 121102 was one of a kind. Which raised a discouraging possibility: Could it be the only one of its kind? Each new pulse produced tantalizing data. But to really make sense of it, astronomers needed to find another—if any existed.

They began to search the sky, with focused attention and more powerful tools. And, to their relief, astronomers have now found that, no, FRB 121102 is not the lone example of this intriguing phenomenon.

A Canadian-led team announced Wednesday the discovery of a second repeating FRB. A newly built radio telescope in British Columbia detected six flashes from the same spot in the sky last summer. This FRB, named 180814, appears to originate about 1.5 billion light-years away from Earth, half the distance of the other repeating burst.

Cosmic collision billions of years off could fling Earth out of Milky Way

Cosmic collision billions of years off could fling Earth out of Milky Way Day to day here on Earth, our biggest threat from space is probably some undetected asteroid smashing into us.

What ’ s Better Than One Mysterious Cosmic Signal ? No one knows exactly what they are, or what causes them, but astronomers have detected dozens over the past decade. The signals , known as fast radio bursts, originate from deep within the cosmos , well beyond the Milky Way galaxy.

The Meroë pyramids, smaller than their Egyptian cousins, are considered Nubian pyramids, with narrow bases and steep angles on the sides, built between 2,700 and 2,300 years ago, with decorative elements from the cultures of Pharaonic What ’ s Better Than One Mysterious Cosmic Signal ?

The same team has also detected 12 more one-off FRBs, which brings the total number of known flashes to 65. The research, described in a pair of papers in Nature, will provide more clues to one of astronomy’s greatest mysteries.

The two repeating signals have more in common than just their flashy nature. When FRBs arrive at Earth, many appear smeared across a range of frequencies, a sign of their long and bumpy journeys through cosmic material across the universe. This includes FRBs 121102 and 180814. But even though the bursts came from two very different locations, and carved out two very different paths to Earth, their radio waves showed similar distortion patterns.

What’s Better Than One Mysterious Cosmic Signal? © Getty A general view of one of a 64-dish radio telescope system is seen during an official unveiling ceremony on July 13, 2018 in Carnarvon. - South Africa on July 13 unveiled the planet's super radio telescope which will be at least 50 times more powerful than any telescope on earth. Deputy President on July 13, formally unveiled the 64-dish radio telescope array in the remote and arid Karoo region of South Africa that offers prime conditions for astronomers. Named the MeerKAT, the 64 receptors are set to be integrated into a multi-nation Square Kilometre Array (SKA). (Photo by MUJAHID SAFODIEN / AFP) (Photo credit should read MUJAHID SAFODIEN/AFP/Getty Images)

This particular finding stunned astronomers at a recent conference, where the researchers teased their discovery with a little trick. “They put up images of these bursts, and everyone was like, ‘Okay, that looks familiar,’ and then the person showing it said, ‘Actually, you’ve never seen this before, because they’re from a new repeating FRB,’” said Shami Chatterjee, an astrophysicist at Cornell who studies FRBs and was not involved in the new research. “It looks shockingly similar.”

Charming, Newly Discovered Treefrog Has A Mysterious Claw

Charming, Newly Discovered Treefrog Has A Mysterious Claw Introducing Hyloscirtus hillisi, a species of treefrog recently discovered in the eastern Andes of Ecuador. Among its many distinguishing features is an enlarged claw, the purpose of which isn’t immediately clear. H. hillisi is the latest member of the Hyloscirtus genus of frogs, of which 37 species were previously known. These frogs like to live and reproduce around streams, and can be found from Costa Rica to the Andes of Bolivia, Colombia, Ecuador, Peru, and Venezuela. They’re also known for their elaborate camouflage and the flanging tips on their fingers and toes. © Image: Darwin Núñez, BIOWEB Ecuador.

There's often a mismatch between how you perceive your own vulnerabilities and what other people think of them. This particular finding stunned astronomers at a recent conference, and more discoveries are likely on their way. What ’ s Better Than One Mysterious Cosmic Signal ?

what they are, what they mean, or where in the Universe they come from - fast radio bursts, those brilliant bursts of energy that last mere milliseconds, but are a We're still trying to figure out where this one came from." FRBs are some of the most mysterious and explosive signals in the Universe, and

The similarities suggest the two repeaters may have originated in the same kind of environment. It’s possible that repeating bursts are just one of many classes of FRBs, some yet to be discovered. But with so little information, researchers are far from any definitive conclusions.

“We don’t know what it means yet,” said Ingrid Stairs, an astrophysicist at the University of British Columbia and a member of the research team. “This is our second repeater. I think we need to have a much better sample.”

When the first FRB was discovered in 2007, some astronomers thought the flashes could be errant noise from telescope instruments. The bursts just didn’t seem real. “These things are billions of light-years away,” said Jason Hessels, an astronomer at the University of Amsterdam and ASTRON, the Netherlands Institute for Radio Astronomy, who studies FRBs. “It’s absolutely remarkable that they can still be bright enough to detect on Earth.”

In pictures: Fascinating asteroids

The complicated twisting observed in FRBs suggests they come from extreme environments with strong magnetic fields and high temperatures. Astronomers know of several astrophysical objects that could provide these radio-wave-bending conditions: Supermassive black holes, which can belch streams of radiation in space when they eat matter. Neutron stars, the fast-spinning cores of stars, leftover from spectacular explosions. Magnetars, a certain kind of neutron star, which spin even faster.

Before the detection of 121102, FRBs were thought to be one-time events, the products of cosmic collisions or explosions that, given the power of the flashes, no astrophysical object could surely survive. The repeating nature of 121102 showed that the universe, always ready to surprise, is capable of producing objects that can erupt over and over without fizzling out.

The scattered waves of FRBs can be used to answer other intriguing but basic questions about the universe, including what it’s actually made of. “If you try to add up all the material in galaxies and stars and planets and rocks, it doesn’t come up to the right number at all. We’re short by a lot,” Chatterjee said. “So where is all this missing matter?”

What’s Better Than One Mysterious Cosmic Signal? © Reuters A Hubble Space Telescope image shows bright blue gas threading through the galaxy IC 4870 that shines because it emits radio wave and gamma-ray radiation, in this image obtained September 26, 2018. NASA/ESA/Hubble Space Telescope/Handout via REUTERS THIS IMAGE HAS BEEN SUPPLIED BY A THIRD PARTY. IT IS DISTRIBUTED, EXACTLY AS RECEIVED BY REUTERS, AS A SERVICE TO CLIENTS

Astronomers suspect that it may reside in the space between galaxies. The intergalactic medium is orders of magnitude emptier than the best vacuums in our terrestrial laboratories, but it still has some wisps of cosmic matter. The universe is so big, though, that these tiny traces could make up a substantial amount of space stuff. FRBs pass through this matter as they travel through space, and their interactions become encoded in the radio waves.

Investigation into mysterious slaying

Investigation into mysterious slaying Homicide detectives today combed Hunter Street in Brisbane's Kelvin Grove after Robert Frescon, 33, was found with a stab wound to the neck in his own home.

The most mysterious explosive signals in the Universe, they’ve been linked to a slew of things, including alien spaceships and microwaves, but remain It’ s easy to assume scientists are more than just perplexed, but downright frustrated. However, this isn’t merely a high school math problem, and

“When [the FRB] arrives at Earth, we can basically read that information off of the radio burst itself,” said Sarah Burke-Spolaor, an astronomer at West Virginia University who studies FRBs. The cosmic flashes can help illuminate the complicated composition of the universe, and the more FRBs astronomers detect, the more ground—er, space—they can cover.

More discoveries are likely on their way. The telescope responsible for these findings, the Canadian Hydrogen Intensity Mapping Experiment, or CHIME, promises to be the most effective FRB hunter in operation. CHIME scans the entire northern hemisphere every day, hopping from one spot to the next every 15 minutes. The observatory can examine 500 times more sky than the next FRB superstar, the Parkes radio telescope in Australia, which revealed the first FRB in 2007 and has found the majority of known bursts.

What’s Better Than One Mysterious Cosmic Signal? © Wikipedia

You could say CHIME wasn’t even trying when it found a new batch of FRBs last summer. The data was collected before the telescope’s “first light” in September, which marked the beginning of formal operations. Over the summer, astronomers were still tinkering with the instruments. “We were calibrating it and improving it day by day,” said Cherry Ng, an astronomer at the University of Toronto and a member of the research team. “Sometimes we had to turn off the instrument just to make changes.”

Scientists estimate FRBs occur about 10,000 times a day across the entire sky, and CHIME, at peak capacity, is poised to detect dozens every month.

As with most cosmic mysteries, the specter of an extraterrestrial explanation looms large. Some, including astrophysicists at Harvard, have suggested FRBs are beacons from an advanced alien civilization. Hello out there! they shout, searching the vastness of space for neighbors. FRB researchers say they can’t rule out an extraterrestrial origin for the cosmic flashes. It’s one possibility of many. But it’s the least likely, they say.

“[FRBs] come from all over the sky, and from many different distances, always from different galaxies—the chances of aliens living in different parts of the universe getting together to organize, to produce these signals in this kind of way, is infinitesimally small,” Stairs said. “There’s just too many of them out there.”

On top of that, the home environments of FRBs aren’t exactly conducive to life, intelligent or not. The emissions likely torch their surroundings as they erupt into space. “If we had one go off near Earth, we might not be around anymore,” Burke-Spolaor said.

Investigation into mysterious slaying.
Homicide detectives today combed Hunter Street in Brisbane's Kelvin Grove after Robert Frescon, 33, was found with a stab wound to the neck in his own home.

—   Share news in the SOC. Networks

Topical videos:

usr: 0
This is interesting!