Tag: Black Holes

Scientists have strengthened the potential connection between dark energy and black holes. New research suggests that as more black holes were born in “little Big Bang reverse replays” in the 14.6 billion-year-old cosmos, the strength of dark energy grew to dominance and continues to change to this day. Dark energy is the placeholder name given to the mysterious force driving the acceleration of the universe’s expansion in its current epoch. It is troubling because scientists have no idea what dark energy is, yet it dominates our universe, accounting for around…

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What does the supermassive black hole lurking at the center of our galaxy look like?It’s a deceptively simple question.  Although our local cosmic abyss, named Sgr A* (short for Sagittarius A*), resides just 26,000 light-years from Earth, it has proven to be a very difficult object to image. This is thanks in part to material whipping around it at near light-speeds. However, after years of trying, scientists with the Event Horizon Telescope (EHT) project succeeded in 2022.The black hole’s silhouette emerged from the shadows, appearing like a fuzzy orange doughnut.…

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Using the James Webb Space Telescope, astronomers have peered back 13 billion years to discover surprisingly lonely supermassive black hole-powered quasars.  The James Webb Space Telescope’s (JWST) observations are confusing because isolated black holes should struggle to gather enough mass to reach supermassive status, especially just a few hundred million years after the Big Bang. The discovery further muddies the waters when it comes to the puzzle of how some black holes grew to masses equivalent to millions or even billions of suns when the universe was less than a…

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Black hole mergers are beautiful — and some of the most violent events in the cosmos. Here’s how the process unfolds. The story begins with two black holes orbiting far from each other in long, lazy circles. They could have been born as a binary pair of stars, or they may have just randomly encountered each other in the depths of interstellar space. Either way, to merge, they must get close, which means losing a lot of orbital energy. The first step in stealing energy from the system is through…

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Using the James Webb Space Telescope (JWST), astronomers have spotted the earliest powerful “galaxy-size” wind blowing from a feeding supermassive black hole-powered quasar. The powerful wind is pushing gas and dust from its galaxy at incredible speeds, killing star birth in its host galaxy.  This quasar, designated J1007+2115, is so distant that it is seen as it was just 700 million years after the Big Bang — when the 13.8 billion-year-old universe was just around 5% of its current age. Though this makes J1007+2115 just the third-earliest quasar ever seen,…

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If microscopic black holes born a fraction of a second after the Big Bang exist, as some researchers suspect, then at least one may fly through the solar system per decade, generating tiny gravitational distortions that scientists can detect, a new study finds. These findings suggest that if astronomers can discover and confirm the existence of such gravitational disruptions, they may be able to solve the mystery behind the nature of dark matter, the unseen material that many researchers suspect makes up about five-sixths of all matter in the cosmos.…

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An experiment using beams of protons to probe how plasma and magnetic fields interact may have just solved the mystery of how quasars and other active supermassive black holes unleash their relativistic jets. Let’s picture the scene at the heart of a quasar. A supermassive black hole, perhaps hundreds of millions — or even billions — of times the mass of our sun, is ravenously devouring matter that is streaming into its maw from a spiraling, ultra-hot disk. That charged matter is called plasma, and  it gets gravitationally drawn into…

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This article was originally published at The Conversation. The publication contributed the article to Space.com’s Expert Voices: Op-Ed & Insights. Fan Zou is a graduate student at Penn State University while W. Neil Brandt is a professor of astronomy and astrophysics at Penn State. Black holes are remarkable astronomical objects with gravity so strong that nothing, not even light, can escape them. The most gigantic ones, known as “supermassive” black holes, can weigh millions to billions times the mass of the Sun. These giants usually live in the centers of galaxies. Our own galaxy, the Milky…

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“What happens when you throw a star at a black hole?” It’s not a question we can physically answer here on Earth.  Thankfully, actual black holes and stars can’t be smashed together in the lab! However, scientists can use advanced supercomputer modeling to simulate a black hole ripping apart and devouring a star in a so-called “tidal disruption event” or “TDE.” Doing just that, a team of researchers led by Danel Price from Monash University has discovered that the answer to our opening question is “things get messy.”  “Black holes…

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Binary pairings of small black holes could be used by astronomers in a cosmic game of “hide-and-seek” to hunt much larger, yet more elusive, supermassive black hole binaries. The technique could, therefore, help solve the mystery of how supermassive black holes grew so fast in the early universe. Detecting black holes is no easy task despite their reputation as fearsome cosmic titans. All black holes are surrounded by a one-way light-trapping boundary called an “event horizon” that ensures they emit no light. Even the supermassive black holes at the hearts…

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