Dark Matter Goes Missing in Oddball Galaxy

The galaxy NGC 1052-DF2 as seen by the Hubble Space Telescope

For comparison, astronomers have found that the Milky Way Galaxy has an amount of dark matter that's 30 times greater than all the matter we can see with our array of different telescopes.

"For decades, we thought that galaxies start their lives as blobs of dark matter", said astronomer Pieter van Dokkum of Yale University in a press release issued by W.M. Keck Observatory. Stars in galaxies containing dark matter move at least three times faster. "It's so rare, particularly these days after so many years of Hubble, that you get an image of something and say, 'I've never seen that before'. It is literally a see-through galaxy", he added. Even the globular clusters are oddballs: they are twice as large as typical stellar groupings seen in other galaxies. But physicists contacted by Live Science to discuss this paper mostly said the finding made dark matter (already the dominant explanation for the universe's weirdness) look a lot more likely. In other words, dark matter doesn't seem to be exerting its gravity on normal matter in that galaxy.

How can a galaxy be there without dark matter? However you wouldn't expect that galaxy to be as big as this object (it's nearly the size of the Milky Way), and you'd also expect to see some other remnants around from the merger event. Dark issue appears to be should attract adequate product to create the galaxy and also its celebrities, and also halos of dark issue maintain galaxies from rotating apart as they revolve.

There have been several ideas that have floated around regarding the true nature of dark matter, and discoveries like this will only push astronomers to unlocking its secrets. NGC 1052-DF2 is considered to be some 10 billion years old.

Six year old free trade agreement overhauled by United States and South Korea
Under the deal, South Korea agreed to limit its steel exports to the United States and made concessions on auto imports. The US this month commenced levying the steel tariffs vociferating that US imports endangered USA national security.

Parsing what that means isn't easy, but it does lead to one clear, if counterintuitive, conclusion, the team argues: "Alternatives to dark matter have trouble with this object", van Dokkum said. In one, a sudden explosion of massive star-birth inside the galaxy could have cleared out all of its gas and dark matter. Astronomers know it's there because of its gravitational influence, but they can't detect it any other way. They then calculated the mass of the galaxy.

The galaxy is about 65 million light-years away in the constellation of Cetus and is about the same size as the Milky Way. But how it formed is a complete mystery.

These ideas, however, still do not explain how this galaxy formed. They discovered this by watching smaller collections of stars, known as globular clusters, orbit the galaxy. It turns out that a galaxy without dark matter is incompatible with models that replace it using modified gravity. They can't agree on what it's made of, how much a single particle weighs, or the best way to construct a Play-Doh diorama of it. We only believe dark matter exists because we can see how it affects "regular", or baryonic, matter. Imaging them enabled the research study group to establish their activities orbiting the galaxy, which could, consequently, give an action of the quantity of mass that is associated with maintaining the things in position. NGC1052-DF2 disproves that theory, providing further evidence to the actual existence of dark matter.

Dark matter does not emit electromagnetic radiation, and remains immune to direct observation. Future observatories under construction, such as the European Extremely Large Telescope in Chile's Atacama Desert, or NASA's James Webb Space Telescope, should be able to take such measurements.

Related news:

Hot News

isis-killer-beheading-video-story-top Govt plans to sell 76% stake in Air India, cede management control
Mar 30, 2018 - 00:38
According to the PIM, Air India has 16,834 employees as on December 1, 2017 of which 11,214 are permanent employees. Perhaps the easiest to handle in terms of staffing related issues would be Air India SATS Airport Services Ltd.

isis-killer-beheading-video-story-top Corey Feldman Claims He Was Stabbed
Mar 29, 2018 - 02:31
Despite LAPD seemingly finding no evidence of "lacerations", they are investigating the incident as assault with a deadly weapon. Oz Show a year ago , Feldman told the host that he was sexually abused when he was a child.

isis-killer-beheading-video-story-top 'Roseanne' Reboot Rocks with 18 Million Viewers
Mar 29, 2018 - 02:28
The politically charged reboot of " Roseanne " reportedly soared to a ratings win with its Tuesday premiere. Roseanne's daughter Darlene ( Sara Gilbert ) also moves in with her on the premiere after losing her job.

isis-killer-beheading-video-story-top Uber Is Selling Southeast Asian Operations to Ride-Hailing Rival Grab
Mar 29, 2018 - 02:23
And at the same time, Uber is also taking the heat in the form of high marketing expenses, required to keep up with Grab . Is Uber withdrawing from Southeast Asia? $7) for UberX and in Manila ( Philippines ) its start at 189 pesos (approx.

isis-killer-beheading-video-story-top Jaguar sets pace with self-driving auto
Mar 29, 2018 - 02:22
Waymo plans to launch the world's first self-driving vehicle service that users can hail with an app. The company has not specified where it will be heading after Phoenix.

isis-killer-beheading-video-story-top For The 4th Time Ever, Mega Millions Jackpot Passes $500M
Mar 29, 2018 - 02:15
The next drawing will be Friday night, with an estimated jackpot topping the half-billion dollar mark, at $502-million. No one won the jackpot in Tuesday's Mega Millions drawing, but three tickets sold in Virginia are worth $10,000.

isis-killer-beheading-video-story-top Mitch McConnell Announces Bill to Legalize Hemp
Mar 28, 2018 - 01:50
Kentucky's Industrial Hemp Research Pilot Program grew out of the 2014 Farm Bill, thanks in part to McConnell's input. Much of the agriculture industry has already been lobbying to declassify hemp as a Schedule I controlled substance.

isis-killer-beheading-video-story-top South Korea Agrees to Further Open Auto Market to US
Mar 28, 2018 - 01:49
It also agreed to double to 50,000 the number of U.S. cars that could be imported without meeting local safety standards.

isis-killer-beheading-video-story-top Nokia 1 Android Go Edition Launched in India
Mar 28, 2018 - 01:47
A fixed focus 5 MP camera complete with LED flash adorns the rear while the front gets a 2 MP camera , also of fixed focus. For connectivity, there's 4G VoLTE, Bluetooth v4.2, GPS/ A-GPS, Wi-Fi 802.11 b/g/n, Micro-USB, and a 3.5mm audio jack.

isis-killer-beheading-video-story-top Bailey Davis, ex-New Orleans Saints cheerleader, says National Football League team's policies discriminate
Mar 28, 2018 - 01:44
But NFL players have no limit on who can follow them on social media and aren't punished for reaching out to the cheerleaders. Saintsations management told her she had a "dirty face" in the pictures, which invited attention from players, Davis said.

isis-killer-beheading-video-story-top Suspect packages, one with explosives, sent to DC military facilities
Mar 28, 2018 - 01:42
During screening, the packages were found to be suspicious, although it is unclear what made them suspicious. The FBI is in possession of the packages and is now trying to determine if they could have exploded.

isis-killer-beheading-video-story-top Notch the phone we were expecting - Huawei unveils the P20 Pro
Mar 28, 2018 - 01:40
In addition to that, it comes with 6GB of RAM and 128GB of internal storage which is not compatible with an SD card. There's also a beefy autofocus system that leverages a laser along with face detection and depth information.

Cambridge Analytica formally accused of violating USA election laws
Mar 27, 2018 - 19:10
Cambridge Analytica whistleblower Christopher Wylie pictured at a news conference in London , on March 26, 2018. Wylie told the UK Parliament that the Congress party was a client of the disgraced company.

isis-killer-beheading-video-story-top Messi: Dybala and I don't combine well
Mar 27, 2018 - 19:09
While of the opinion that too much is expected of Messi, Sampaoli concedes that he is working with a special talent. He tweeted on Tuesday afternoon: "Messi will not play tonight either".

Apple iPhone SE 2 Might Be An Indian Exclusive Device
Mar 27, 2018 - 19:09
Other reports about the phone hint that it could feature 2GB RAM and will be up for sale in 32GB and 128GB storage variants. We are not sure regarding the reliability of this report that is why it is advised to take this rumor with a pinch of salt.