WASHINGTON/CAMBRIDGE, Mass.: Scientists for the first time have detected gravitational waves, ripples in space and time hypothesized by Albert Einstein a century ago, in a landmark discovery announced on Thursday that opens a new window for studying the cosmos.
The researchers said they identified gravitational waves coming from two distant black holes — extraordinarily dense objects whose existence also was foreseen by Einstein — that orbited one another, spiraled inward and smashed together at high speed to form a single, larger black hole.
The waves were unleashed by the collision of the black holes, one of them 29 times the mass of the sun and the other 36 times the solar mass, located 1.3 billion light years from Earth, the researchers said.
“Ladies and gentlemen, we have detected gravitational waves. We did it,” said California Institute of Technology physicist David Reitze, triggering applause at a packed news conference in Washington.
“It’s been a very long road, but this is just the beginning,” Louisiana State University physicist Gabriela Gonzalez told the news conference, hailing the discovery as opening a new era in astronomy.
The scientific milestone was achieved using a pair of giant laser detectors in the United States, located in Louisiana and Washington state, capping a decades-long quest to find these waves.
“The colliding black holes that produced these gravitational waves created a violent storm in the fabric of space and time, a storm in which time speeded up, and slowed down, and speeded up again, a storm in which the shape of space was bent in this way and that way,” Caltech physicist Kip Thorne said.
The scientists first detected the waves last Sept. 14.
The two instruments, working in unison, are called the Laser Interferometer Gravitational-Wave Observatory (LIGO). They detected remarkably small vibrations from the gravitational waves as they passed through the Earth. The scientists converted the wave signal into audio waves and listened to the sounds of the black holes merging.
At the news conference, they played an audio recording of this: a low rumbling pierced by chirps.
“We’re actually hearing them go thump in the night,” Massachusetts Institute of Technology physicist Matthew Evans said. “There’s a very visceral connection to this observation.”
“We are really witnessing the opening of a new tool for doing astronomy,” MIT astrophysicist Nergis Mavalvala said in an interview. “We have turned on a new sense. We have been able to see and now we will be able to hear as well.”
While opening a door to new ways to observe the universe, scientists said gravitational waves should help them gain knowledge about enigmatic objects like black holes and neutron stars. The waves also may provide insight into the mysterious nature of the very early universe.
The scientists said that because gravitational waves are so radically different from electromagnetic waves they expect them to reveal big surprises about the universe.
Einstein’s gravitational waves detected in landmark discovery
Einstein’s gravitational waves detected in landmark discovery
Fatal ICE shooting of Minneapolis activist sets stage for national protests
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Over 1,000 ‘ICE Out’ rallies planned across US
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Minnesota launches inquiry separate from federal probe
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Agent’s own video heightens contradictory accounts of shooting
MINNEAPOLIS: Civil liberties and migrant-rights groups called for nationwide rallies on Saturday to protest the fatal shooting of an activist in Minnesota by a US immigration agent, as state authorities opened their own investigation of the killing.
Protest organizers said more than 1,000 weekend events were planned across the country demanding an end to large-scale deployments of US Immigration and Customs Enforcement agents ordered by President Donald Trump, mostly to cities led by Democratic politicians.
Minneapolis became a major flashpoint of the Republican president’s militarized deportation roundups on Wednesday, when an ICE officer shot and killed a 37-year-old mother of three, Renee Good, behind the wheel of her car on a residential street.
The violence came soon after some 2,000 federal officers were dispatched to Minneapolis in what ICE’s parent agency, the Department of Homeland Security, called the “largest DHS operation ever.” Minnesota Governor Tim Walz, a Democrat, condemned the deployment as a “reckless” example of “governance by reality TV.”
CONFLICTING NARRATIVES OF KILLING
On Friday night, throngs of demonstrators staged a “noise protest” outside a Minneapolis hotel believed to be lodging a visiting contingent of ICE agents.
Video posted by activists on social media showed protesters, some wearing brightly colored inflatable costumes, creating a din by beating on drums, banging pots and pans, yelling through bullhorns and blowing on brass instruments and whistles. Others directed high-power flashlight beams at the hotel’s windows. The crowd thinned after yellow-vested state police in riot gear marched into the area and declared an unlawful assembly, CNN reported.
Police were responding to “information that demonstrators were no longer peaceful and reports of damage to property,” the Minnesota Department of Public Safety said on X. “Dispersal orders were given prior to arrests.”
At the time she was killed, Good was participating in one of numerous “neighborhood patrols” that track, monitor and record ICE activities, according to family and local activists.
Homeland Security Secretary Kristi Noem and other Trump administration officials said Good was “impeding” and “stalking” ICE agents all day, and that the officer opened fire in self-defense when she tried to ram her car into him in an “act of domestic terrorism.”
Minneapolis Mayor Jacob Frey, a Democrat, pointed to bystander video he said directly contradicted the federal government’s “garbage narrative.” Civil liberties advocates said the video showed federal agents lacked any justification for using deadly force.
Amid the sharply differing accounts of the shooting, Minnesota and Hennepin County law enforcement authorities said on Friday they were opening their own criminal inquiry of the incident separate from a federal investigation led by the FBI.
Some Trump administration officials, including Vice President JD Vance, asserted state prosecutors lack jurisdiction to charge a federal officer with a crime, though legal experts say federal immunity in such cases is not automatic.
The crisis atmosphere led Walz — a prominent Trump antagonist who branded Trump and his Republican allies as “weird” during his own run for vice president last year — to put the state’s National Guard on alert.
Federal-state tensions escalated further on Thursday when a US Border Patrol agent in Portland, Oregon, shot and wounded a man and woman in their car after an attempted vehicle stop. As in the Minneapolis incident, DHS said the driver had tried to “weaponize” his vehicle and run over agents.
DHS on Friday identified the wounded driver and passenger as suspected gang associates from Venezuela who were in the US illegally. The agency said the woman had been involved in a prior shootout in Portland but provided no evidence of its allegations against the pair.
VIDEO EVIDENCE EMERGES
Portland Mayor Keith Wilson, echoing Frey, said he could not be sure the government’s account was grounded in fact without an independent investigation.
The deployment of agents to Minneapolis follows Trump’s recent denunciations of Walz and his state’s large population of Somali immigrants over allegations of fraud dating back to 2020 by some nonprofit groups administering childcare and other social-service programs.
Good was shot dead just a few blocks from where George Floyd was killed by a Minneapolis police officer crushing his neck into the pavement with his knee during a videotaped arrest in May 2020. Floyd’s death sparked months of nationwide racial-justice protests during Trump’s first term in office.
Bystander video of the Minneapolis incident showed masked officers approaching Good’s Honda SUV while it was stopped at a perpendicular angle to the street, partially blocking traffic.
One agent is seen ordering her out of the car and grabbing onto the driver-side front door handle as the car pulls forward and steers away from the officers, one of whom jumps back and fires three shots into the front of the vehicle as it rolls past.
Video filmed by the officer who opened fire, identified through official comment and public records as Jonathan Ross, shows Good appearing calm. She is heard telling him, “That’s fine, dude, I’m not mad at you” — moments before he opens fire as she drives forward into the street, steering the car away from him.
Noem has said he was treated at a local hospital for unspecified injuries and released.
The car’s front bumper appears in the bystander video to pass Ross before he shot at Good. It is unclear from any of the footage whether the vehicle made contact with him.
In any case, Ross is shown remaining on his feet and can be seen walking after the incident, contradicting Trump’s assertion on social media that the woman “ran over the ICE officer.”
The two DHS-related shootings this week have drawn thousands of protesters to the streets of Minneapolis, Portland and other US cities, with many more demonstrations under the banner “ICE Out For Good” planned for Saturday and Sunday.
The rallies were being organized by a coalition of groups including the American Civil Liberties Union, MoveOn Civic Action, Voto Latino, and Indivisible, some of which were at the forefront of “No Kings” protests against Trump last year. (Reporting by Renee Hickman in Minneapolis and Nathan Layne in New York; Writing and additional reporting by Steve Gorman; Additional reporting by Jonathan Allen, Joseph Ax and Maria Tsvetkova in New York and Brad Brooks in Colorado; Editing by William Mallard)
