The first image of a black hole at the center of the Messier 87 galaxy published this week is amazing. The technology developed to create it is just as amazing. The Event Horizon Telescope (EHT) project brought together a network of 10 telescopes across the globe to see, as project director Sheered Doeleman put it, “what we thought was un-seeable”. Einstein first theorized the existence of black holes 100 years ago while developing his theory of general relativity. Since then, there has been a lot of evidence supporting the existence of back holes, and simulations of what they might look like, because one had not been directly observed. So what took so long? Why haven’t we used something like the Hubble Space Telescope (HST) to take this photo? While the black hole in M87 is as wide as our solar system, it’s also 55 million light years away, which makes it very, very small in our sky. Each pixel in HST’s WFC3 camera is about 1,250 times wider … [Read more...] about Science behind black hole image may have far-reaching applications
Primordial black holes
Humankind’s first photographed black hole that captured the world’s attention this week has officially been christened with the name of “Powehi.” The name comes from the University of Hawaii and language professor Larry Kimura, according to a news release from the school. For those wondering why the honor went to the University of Hawaii, the state is home to the James Clerk Maxwell Telescope and Submillimeter Array, which are both part of the Event Horizon Telescope network. Related: Check out the first-ever photo of a black hole captured by astronomers“Powehi, meaning embellished dark source of unending creation, is a name sourced from the Kumulipo, the primordial chant describing the creation of the Hawaiian universe,” the release from the university reads. “Po, profound dark source of unending creation, is a concept emphasized and repeated in the Kumulipo, while wehi, or wehiwehi, honored with embellishments, is one of many descriptions of … [Read more...] about First black hole photographed by humankind christened with official name
The world’s first black hole picture arrives today courtesy of the Event Horizon Telescope (EHT) project. The incredible undertaking linked together radio telescopes around the globe to scan the regions of space around Sagittarius A* – a supermassive black hole at the heart of the Milky Way galaxy. As a result, astronomers have been able to create a “silhouette” of the black hole's event horizon, which has never been achieved before. The groundbreaking discovery will be revealed to the public today during six press conference at 2pm BST (1pm UTC). Related articles Black holes: Astronomer claims spacetime can help 'to travel galaxy' Black holes to accelerate interstellar craft to near-LIGHT SPEED What is a black hole? The EHT picture is a monumental achievement because the physical properties of a black hole make it impossible to observe in a conventional manner. Since black holes were first theorised by physicist Albert Einstein and Karl Schwarzschild in … [Read more...] about What is a Black Hole? Is there LIFE inside a Black Hole? Or never-ending nothingness?
Ridley Scott, eat your heart out. Like terrified moviegoers seated on the edges of their seats and at the mercy of their imaginations, astronomers expect this week to finally see the monster: a supermassive black hole. At 9 a.m. Eastern Time on Wednesday April 10, a group of astronomers who run a globe-girdling network of radio telescopes called the Event Horizon Telescope are expected to unveil their long awaited pictures of a pair of putative black holes. One of the objects sits at the center of the Milky Way galaxy, buried in the depths of interstellar dust and gas, and equivalent in mass to 4.1 million suns that otherwise have disappeared from the visible universe. [ Sign up to get reminders for space and astronomy events on your calendar .] The other target is in the heart of Messier 87, a giant galaxy in the constellation Virgo, where a black hole 7 billion times the mass of the sun is spewing a jet of energy thousands of light-years across space. According to … [Read more...] about Expected Soon: First-Ever Photo of a Black Hole
An international team of researchers has put a theory speculated by the late Stephen Hawking to its most rigorous test to date, and their results have ruled out the possibility that primordial black holes smaller than a tenth of a millimeter make up most of dark matter. Details of their study have been published in this week’s Nature Astronomy. Scientists know that 85 percent of the matter in the Universe is made up of dark matter. Its gravitational force prevents stars in our Milky Way from flying apart. However, attempts to detect such dark matter particles using underground experiments, or accelerator experiments including the world’s largest accelerator, the Large Hadron Collider, have failed so far.This has led scientists to consider Hawking’s 1974 theory of the existence of primordial black holes, born shortly after the Big Bang, and his speculation that they could make up a large fraction of the elusive dark matter scientists are trying to discover today.An … [Read more...] about Researchers Find Dark Matter Not Made Up of Tiny Black Holes