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Tag: universe

Study explains how supermassive black holes first appeared in the early universe

Study explains how supermassive black holes first appeared in the early universe

Science
June 28 (UPI) -- Scientists have developed a new model for the formation and growth of supermassive black holes that could explain their appearance in the early universe. According to the new study, published this week in the Astrophysical Journal Letters, supermassive black holes grow extremely fast over a very short amount of time, and then very suddenly, stop growing. Scientists came up with the new model to better explain the distribution of supermassive black hole masses and luminosities throughout the distant universe. "This is indirect observational evidence that black holes originate from direct-collapses and not from stellar remnants," Shantanu Basu, an astronomy professor at the University of Western Ontario, said in a news release. Basu and his colleague Arpan Das analyzed th...
Avengers Endgame: The Marvel Cinematic Universe explained

Avengers Endgame: The Marvel Cinematic Universe explained

Entertainment
SPOILER ALERT! This article contains details of the plots of some Marvel films, including recent releases. Marvel sequel Avengers: Endgame hits UK cinemas on 25 April and is widely expected to be the biggest release of 2019.The film will be the 22nd entry in the Marvel Cinematic Universe, which began with 2008's Iron Man.If you want to watch Endgame, but feel daunted by the sheer size of the MCU, never fear! Here's everything you need to know. What is the Marvel Cinematic Universe?The Marvel Cinematic Universe - or MCU for short - is the shared place where all 22 films featuring the comic book characters are set.Each tells its own distinct story but also connects with other films in the MCU, to te...
Eighty-three supermassive black holes found in the distant universe

Eighty-three supermassive black holes found in the distant universe

Science
March 13 (UPI) -- Astronomers have discovered 83 new supermassive black holes in the distant universe, or early universe, representing a time when the university was less than 2 billion years old. Researchers were surprised to find so many quasars, glowing galactic nuclei powered by supermassive central black holes, in the early universe, just a few hundred million years after the Big Bang. "Understanding how black holes can form in the early universe, and just how common they are, is a challenge for our cosmological models," Michael Strauss, a professor of astrophysical sciences at Princeton University, said in a news release. Scientists found the quasars using the Subaru Telescope's Hyper Suprime-Cam. The telescope, which is operated by the National Astronomical Observatory of Japan, i...
Physicists replicate earliest days of the universe in super-chilled helium

Physicists replicate earliest days of the universe in super-chilled helium

Science
Jan. 16 (UPI) -- Scientists have for the first time triggered quantum structures long-predicted by cosmologists. Researchers at Aalto University in Denmark observed "walls bound by strings" in superfluid helium-3. The breakthrough could allows scientists to better understand what the universe looked like in its earliest days, as it quickly cooled in the wake of the Big Bang. Helium is unique in it's ability to remain a fluid even at cryogenic temperatures. When supercooled, helium becomes a superfluid, which means it boasts zero viscosity. Superfluids can flow forever without losing energy. When trapped inside a nanostructure, superfluid phases of the isotope helium-3 can help scientists study unusual quantum structures called half-quantum vortices. The movement of helium inside these vor...
Stephen Hawking's final interview: A beautiful Universe

Stephen Hawking's final interview: A beautiful Universe

Science
Last October I invited Prof Stephen Hawking to comment on the detection of gravitational waves from the collision of two neutron stars. It turned out to be his final broadcast interview.The collision was a really big story for many reasons, not least because within minutes of the detection the world's telescopes were trained on what was an incredible cosmic event.This meant that as well as detecting the ripples in space-time from the merger, astronomers could see also for the first time what happens when two incredibly massive objects come together in a process that may be the only way of creating gold and platinum in the Universe.It was definitely one for Prof Hawking to explain. Einstein's waves detected in star smashGravitational waves: A new 'tape measure'In recent years, he made comme...