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According to a recent paper, the Earth is caught directly in the crosshairs of a cosmic hurricane.A swarm of nearly 100 stars, accompanied by an even greater amount of dark matter, is aimed directly at our stellar neighborhood and there's nothing we can do to stop it; in fact, the vanguard is already upon us. This sounds like a perfect summer blockbuster movie, starring The Rock and Chris Pratt, or maybe Scarlett Johansson and Charlize Theron.Except this is for real. But is it a danger? Well, actually, no. Not at all. But it's potentially incredibly fascinating, with lots of interesting scientific interconnections. So, what is really going on?The story starts last April, when the Gaia satellite announced the locations and trajectories of 2 billion stars in the vicinity of the Milky Way surrounding our sun. They released the data to the public.Scientists were then able to look at the data set to see if they could spot anything peculiar. In galaxies like the Milky Way, the most common behavior is that the stars orbit the center of the galaxy in a manner broadly similar to the planets orbiting our sun. However, there are some stars that exhibit unusual motion. About a year ago, astronomers identified some "stellar streams" passing through our celestial neighborhood.One of them, called S1 (for stream 1), consists of nearly 100 stars of similar age and composition, orbiting the Milky Way in a direction exactly opposite that of normal stars. It's kind of like a handful of cars driving the wrong way down the highway, except with a much greater distance between them and with no likelihood of a collision. These stars are spread out over a few thousand light years and they will pass through the solar system's neighborhood over the course of a few million years.Astronomers identified S1 as being part of the remnants of a dwarf galaxy that collided with the Milky Way and was consumed in an epic episode of cosmic cannibalism. Dwarf galaxies are very small, typically about 1% the mass of the Milky Way. They can orbit larger galaxies and collide with the bigger galaxy, adding their mass to the parent. This is what appears to have happened in the case of S1, although the process has taken probably a billion years.Dwarf galaxies often have a disproportionately large fraction of dark matter. Dark matter is a hypothetical and still-undiscovered form of matter that interacts only gravitationally. Scientists have proposed its existence to explain many astronomical mysteries, for example the observation that most galaxies rotate faster than can be explained by the known laws of physics and the stars and gas of which they are composed.While dark matter has not yet been observed, hypothesizing its existence is the simplest and most economical explanation for myriad astronomical mysteries. Averaged over the entire universe, dark matter is thought to be five times more prevalent than the ordinary mass of stars and gas and planets.In dwarf galaxies, the fraction of dark matter is often higher. In Fornax, a well-studied dwarf galaxy orbiting the Milky Way, researchers estimate that the dark matter is between 10 and 100 times greater than the mass found in its stars.If that number holds for S1, the dark matter of the S1 stream is passing through the Earth at a much higher velocity than the more ordinary dark matter that orbits the Milky Way -- about twice as fast. It is thought that S1 dark matter is flying through the solar system at a speed of about 550 km/s, or about 1.2 million mph. While these numbers are impressive, they are misleading. Dark matter, if it exists, is extremely diffuse and it will have no discernible effect on the solar system.Because dark matter hasn't been observed yet, these velocity numbers are speculative, although they are strongly supported by a very large body of evidence. However, the prospect of high velocity dark matter flying through the Earth has suggested an opportunity to detect it.In a paper in the prestigious journal Physical Review D, researcher Ciaran O'Hare and his collaborators calculated the possibilities of discovering dark matter using both existing and proposed dark matter detectors. They considered two varieties of dark matter particles: a very heavy kind called a WIMP (weakly interacting massive particle) and a very light kind called an axion. Because the ultimate nature of dark matter is not known, it is important to be open to all possibilities.They found that the detectors they evaluated could find WIMPs for certain ranges of the particle mass. However, when they looked at the axion possibility, it appeared the prospects were even better. Because of its light mass and the manner in which an axion would interact with the detector, the apparatus simply has a better chance of seeing the axion. (If axions exist, of course.)Experiments with names like ADMX, MADMAX and ABRACADABRA are able or will be able to search for the signatures of dark matter proposed in the recent paper. They consist of technologies that are designed to interact with axions in a strong magnetic field and convert them to ordinary microwaves or radio waves that can be easily detected.It's important to remember that the S1 stream poses no credible threat to the Earth and humanity. There is no need for an action hero to save us. However, the synergy of science is staggering. A careful catalog of nearby stars has opened the prospect of a better possibility of finding and identifying dark matter, which is one of the great unanswered mysteries of modern physics. It's an amazing time we live in, in which we can study such things.\ 5625

After a group of demonstrators posted Fox News Host Tucker Carlson's home address on Twitter, the network stopped tweeting.It is seen as a silent protest from the network, according to Politico. The account has 18.3 million followers, which gives it a huge audience reach.Fox News hasn't officially said why it stopped tweeting. There have been no tweets from the largely followed account since Nov. 8.Politico reports 1.4 percent of FoxNews.com traffic in October came from Twitter, including all of the network's official accounts. That information comes from a tracker called SimilarWeb.Data shows nearly 70 percent of FoxNews.com traffic is from direct clicks on the website. Twitter may not be providing enough meaningful impact to the network's digital business, experts say. 809

About 350 newspapers in the United States had editorials Thursday decrying President Donald Trump's description of the media as the "enemy of the people."Here are some of the newspapers blasting Trump's anti-press rhetoric. 231

A woman was thrown from a vehicle on I-10 south of Eloy, Arizona. According to the Arizona Department of Public Safety, troopers responded to a crash on eastbound Interstate 10 near Picacho, just after 11:30 p.m. on Sunday. Troopers received 911 calls about the incident, and one caller told DPS a woman was thrown from a vehicle. When troopers arrived on the scene they found a woman in her twenties who had been killed. The body was found on the right shoulder. The victim has not been identified. According to DPS, the suspect was traveling in a white Volkswagen sedan. No other suspect description has been given. The eastbound lanes of Interstate 10 were closed near Eloy for about seven hours, but have since reopened.   784

Adam Coy has officially been fired by Columbus Police, a week after an incident where he shot 47-year-old Andre Hill multiple times.One day after last week’s incident, Columbus Mayor Andrew Ginther directed police to strip Coy of his duties, but Coy would remain on payroll and would be afforded a hearing due to the city's contract with the police union. On Monday, his firing was formalized.Coy did not attend the hearing on Monday, opting to have members of the local police union argue his case.Meanwhile, the Franklin County, Ohio, Coroner’s Office said on Monday that Hill died from “multiple” gunshot wounds.The state's attorney general is now investigating for possible criminal charges. "(Ohio's Bureau of Criminal Investigations) will conduct a complete, independent and expert investigation – a search for the truth. We conduct more officer involved shooting investigations than any agency in the State of Ohio, and will pursue every lead without favoritism or regard to politics," Ohio AG Dave Yost said.Hill was holding a cellphone at the time of his death, based on a review of one of the responding officer's body-worn camera footage. Hill walked toward the officer with a cell phone in his left hand while his right hand was not visible.Attorney Ben Crump and the Hill family issued a joint statement reacting to Monday's announcement. "The Columbus Department of Public Safety made the correct decision to terminate Officer Adam Coy today. We look forward to reviewing all the bodycam footage and determining everything that happened leading to Andre Hill’s death. We need to redefine a relationship between police and communities of color in which it doesn’t turn deadly for a Black person with a cell phone to encounter a law enforcement officer," the statement read.Officers were called to the area for a report of a man sitting in an SUV, continually turning on and off the vehicle, police said.According to the Columbus Dispatch, Coy was involved in an excessive force complaint that resulted in the City of Columbus paying a ,000 payout. Coy was suspended for 160 hours for the 2012 incident, but kept his job.The shooting was the second time a citizen was killed by law enforcement within the city. Earlier this month, Casey Goodson Jr. was shot and killed by Franklin County Sheriff Deputy Jason Meade. Authorities said that investigators recovered a weapon on the scene, but a family attorney told CNN that Goodson was holding a sandwich at the time of the shooting. No charges have been filed in that case, and investigation is still ongoing.During the shooting death of Goodson, deputies were not wearing body-worn cameras. When Coy shot Hill, Ginther said Coy did not turn on his camera until after the shooting. Ginther said that the body-worn cameras worn by Columbus Police have a 60-second “lookback” feature that captured video of the shooting. The lookback feature does not capture the audio."The Division invested millions of dollars in these cameras for the express purpose of creating a video and audio record of these kinds of encounters. They provide transparency and accountability, and protect the public, as well as officers, when the facts are in question," Police Chief Thomas Quinlan said.On Monday, Ginther suggested other officers could face disciplinary action for not having their body camera turned on at the time of shooting, and for not providing aid to Hill. 3423