Black Hole

This article was originally published at The Conversation. The publication contributed the article to Space.com's Expert Voices: Op-Ed & Insights. David Blair, Emeritus Professor, ARC Centre of Excellence for Gravitational Wave Discovery, OzGrav, University of Western Australia In 2017, astronomers witnessed the birth of a black hole for the first time. Gravitational wave…

Home News (Image credit: Shutterstock) Dark matter, the mysterious substance that exerts gravitational pull but emits no light, might really consist of vast concentrations of ancient black holes created at the very start of the universe, according to a new study. That conclusion comes from an analysis of the gravitational…

A gravitationally lensed gamma-ray burst, designated GRB 950830, helped astronomers detect a black hole about 55,000 times more massive than the Sun. An artist’s impression of an intermediate-mass black hole. Image credit: Sci-News.com. Astronomers know that stellar-mass black holes — compact ranging from about 10 times to 100 times the…

Theoretical physicists from Italy, Spain and Argentina propose a new mechanism for the creation of supermassive black holes from dark matter. Galaxy halos could harbor a very dense nucleus of dark matter, which may potentially mimic the effects of a central black hole, or eventually collapse to form one. Image…

The majority of supermassive black holes lie dormant and starved of fuel; these hidden giants can be temporarily illuminated when an unlucky star passes close enough to be tidally disrupted and consumed by the black hole; in some cases, the black hole launches fast-moving particle jets. A view of the…

From left, President Joe Biden, First Lady Jill Biden, Vice President Kamala Harris and her husband Doug Emhoff, stand outside the White House during a ceremony to honor the 500,000 Americans that died from COVID-19, Monday, Feb. 22, 2021 in Washington. AP Photo/Evan Vucci President Joe Biden mourned the more…

Sky map showing 25,000 supermassive black holes. Each white dot is a supermassive black hole in its own galaxy. LOFAR/LOL SurveyIt might look like a map of stars, but that’s not what is shown in the image above. Instead, each dot on this map of the night sky represents an…

Astronomers might need to adjust their expectations for black holes. According to the New York Times, an international research team has determined that Cygnus X-1, one of the first discovered black holes, is considerably more massive than once thought. The binary-system based hole was originally pegged at 'just' 15 solar…

By combining 256 hours of observations of the northern sky, astronomers have created a map showing 25,000 supermassive black holes. This is the most detailed celestial map in the field of so-called low radio frequencies. The map covers 4 percent of the northern half of the sky. To create this…

A black hole in the Cygnus X-1 binary system is so massive that it challenges current stellar evolution models. An artist’s impression of the Cygnus X-1 binary system. Image credit: International Centre for Radio Astronomy Research. Discovered in 1964, Cygnus X-1 is an X-ray binary system located in the constellation…