What Are Planck Stars? How Do They Differ From Black Holes? No matter how much evidence there is supporting their existence, black holes remain firmly in the realm of theoretical physics.
Because of their properties—their structure, the fact that they emit no light naturally, where they are found and how they work—they lurk in the shadows. However, not all scientists, including world-renowned physicist Stephen Hawking, assert that traditional black holes are necessary to the framework of modern physics (they are, however, perfectly viable mathematical solutions, no matter how you shake it)—in fact, some go a step further and say that we should replace them with one of many different alternatives..
Stephen Hawking says he has a way to escape from a black hole. Action Press/Rex Stuff that falls into a black hole is gone forever, right?
Not so, says Stephen Hawking. “If you feel you are in a black hole, don’t give up,” he told an audience at a public lecture in Stockholm, Sweden, yesterday. Why Magnetars Should Freak You Out. Paul Sutter is a research fellow at the Astronomical Observatory of Trieste and a visiting scholar at The Ohio State University's Center for Cosmology and Astro-Particle Physics.
Sutter is also host of the podcasts "Ask a Spaceman" and "RealSpace," and the YouTube series "Space In Your Face. " He contributed this article to Space.com's Expert Voices: Op-Ed & Insights. I'll be honest: Magnetars freak me out. Giant Mystery Ring of Galaxies Should Not Exist. Astronomers are constantly uncovering the “most distant,” “most massive” or “most energetic” objects in our universe, but today, researchers have announced the discovery of a truly monstrous structure consisting of a ring of galaxies around 5 billion light-years across.
The galactic ring, which was revealed by 9 gamma-ray bursts (GRBs), is located 7 billion light-years away and spans an area of the sky more than 70 times the diameter of a full moon. ANALYSIS: Mysterious ‘Cold Spot’: Fingerprint of Largest Structure in the Universe? GRBs are thought to be detonated when a massive star reaches the end of its life. As the star implodes after running out of fuel, a black hole is formed and vast quantities of energy are blasted in collimated beams. Should Earth be aligned with these beams, an incredibly luminous signal can be observed and these beacons can be used to precisely gauge the distance to the GRB and the location of the galaxy that hosts it. That Gas Cloud Near Our Black Hole Is Not What We Thought It Was. I’m very disappointed.
The huge chunk of gas (called G2) that was supposed to be engulfed by the supermassive black hole at the center of our galaxy in a wonderful display of pyrotechnics never did and now they think they know why. It’s really a star. In 2011 astronomers noticed a fuzzy hot smear that appeared to be a cloud of gas near our 4 million solar mass, black hole called Sagitarius (Sag A). That wasn’t the exciting part though. Einstein to shed light on black holes. To understand how the universe was created, Einstein’s general theory of relativity needs to be unified with quantum mechanics.
A Danish research team has come up with a theory of how this can be done. (Photo: Colourbox) Every single atom in your body was at one point created in the early universe, for example in supernova explosions – the first atoms being hydrogen atoms, which were presumably created soon after the Big Bang. Wormhole. A wormhole, officially known as an Einstein–Rosen bridge, is a hypothetical topological feature of spacetime that would fundamentally be a "shortcut" through spacetime.
A wormhole is much like a tunnel with two ends each in separate points in spacetime. For a simplified notion of a wormhole, visualize space as a two-dimensional (2D) surface. In this case, a wormhole can be pictured as a hole in that surface that leads into a 3D tube (the inside surface of a cylinder). This tube then re-emerges at another location on the 2D surface with a similar hole as the entrance. An actual wormhole would be analogous to this but with the spatial dimensions raised by one. Spooky Physics Phenomenon May Link Universe's Wormholes. Wormholes — shortcuts that in theory can connect distant points in the universe — might be linked with the spooky phenomenon of quantum entanglement, where the behavior of particles can be connected regardless of distance, researchers say.
These findings could help scientists explain the universe from its very smallest to its biggest scales. Scientists have long sought to develop a theory that can describe how the cosmos works in its entirety. Currently, researchers have two disparate theories, quantum mechanics and general relativity, which can respectively mostly explain the universe on its tiniest scales and its largest scales. Gaia satellite and amateur astronomers spot one in a billion star. An international team of researchers, with the assistance of amateur astronomers, has discovered a unique binary star system — the first known such system where one star completely eclipses the other.
It is a type of a two-star system known as a cataclysmic variable, where one super dense white dwarf star is stealing gas from its companion star, effectively “cannibalizing” it. The system could also be an important laboratory for studying ultra-bright supernova explosions, which are a vital tool for measuring the expansion of the universe. We (think we) know what links wormholes across space & time. Our understanding of wormholes could get a lot spookier.
It seems that we may be entering into a new understanding of quantum physics, given recent developments that point to a link between wormholes through 'spooky action' quantum entanglement. Wormholes have always been the more Hollywood-friendly cousins of black holes. Magnetars: Meet Some of the Most Powerful Stars in the Known Universe. Artists rendering of a magnetar via ESO It all starts with a bang. Neutron stars are, as the name implies, composed almost exclusively out of neutrons. And the facts only get cooler (and stranger) from here. These are a type of stellar remnant that result from supernovae explosions. When particularly massive stars die, there is so much heat and pressure that elements (electrons, protons, and mostly everything) collapse in and are transformed into neutrons.
Stellar black hole. A stellar black hole (or stellar mass black hole) is a black hole formed by the gravitational collapse of a massive star. They have masses ranging from about 3 to several tens of solar masses. The process is observed as a hypernova explosion or as a gamma ray burst. These black holes are also referred to as collapsars. Properties By the no-hair theorem, a black hole can only have three fundamental properties: mass, electric charge and angular momentum (spin). It is believed that black holes formed in nature all have spin, but no definite observation on the spin has been performed. The spin of a stellar black hole is due to the conservation of angular momentum of the star that produced it. NOT (Black Holes Do Not Exist)
A physicist has made the extraordinary claim that she’s proven mathematically that black holes cannot exist. If true (don’t get your hopes up) this could have implications for not only spacetime and the big bang itself but more importantly, all future sci-fi movies. Yes, you heard me right; mathematical proof that black holes cannot exist. My first inclination upon reading this was “total bullshit”. When Black Holes Cross Paths. Kai Staats, filmmaker and science writer, was the co-founder of Terra Soft Solutions, former developer of Yellow Dog Linux and POWER architecture HPC systems. He is now working on his M.S. in Applied Mathematics at the University of Cape Town, South Africa. Staats contributed this article to Space.com's Expert Voices: Op-Ed & Insights. In 2007, when Sony, Microsoft and Nintendo were racing to deliver the most powerful desktop game box on the market, astrophysicist Gaurav Khanna of the University of Massachusetts, Dartmouth, was racing to the local Walmart to purchase not just one, but sixteen Sony PlayStation3s (PS3).
An avid gamer he is not — what he accomplished with those PS3s was quite different from what Sony corporate may have intended. In 2009, Khanna harnessed the power of the IBM Cell microprocessors in a cluster of 16 PS3s to develop a supercomputer, of sorts. The Strangest Black Holes in the Universe. Credit: Alain R. | Wikimedia CommonsBlack holes are gigantic cosmic monsters, exotic objects whose gravity is so strong that not even light can escape their clutches. Black holes come in a wide variety of forms, from small stellar-mass bodies to the supermassive beasts that reside at the hearts of galaxies. Here are 10 of the most extreme black holes, from the smallest to the largest and from cannibals to rogues.
FIRST UP: The biggest and baddest. Neutron Stars Tear Each Other To Shreds, Black Hole Ensues. Found! Trio of Huge Black Holes in Distant Galaxy's Core. Black Hole Facts, Theory & Definition.
Stars. Black holes. Dark matter. Field Guide to X-ray Astronomy. Wormhole Construction: Proceed with Caution. The Strongest Electrical Current in the Universe Spotted, 2 Billion Light Years From Here. Scientists Discover The Oldest, Largest Body Of Water In Existence. Chronology of Black Hole Physics. Chronology of White Dwarfs, Neutron Stars, and Supernovae. How alcohol is formed naturally in space. The Elegant Universe: Pt 1. Brief Answers to Cosmic Questions. 10 Strange Things About The Universe. Wormholes.