Black hole
We also now have an idea of what a black hole might sound like, thanks to physicists from the Massachusetts Institute of Technology. Earlier this month, their findings published in Physical Review Letters reported that a “baby” black hole makes a sound like a chirp. Scientists described the sound as “a waveform that quickly crescendoed before fading away,” or, something resembling the sound of a “chirp.”
The nearest black hole to the Earth we know of is V616 Monocerotis, also known as V616 Mon. It's located about 3,000 light years away, and has between 9-13 times the mass of the Sun.
Black holes are freezing cold on the inside, but incredibly hot just outside. The internal temperature of a black hole with the mass of our Sun is around one-millionth of a degree above absolute zero.A black hole is anything but empty space. Rather, it is a great amount of matter packed into a very small area - think of a star ten times more massive than the Sun squeezed into a sphere approximately the diameter of New York City.
A black hole is a region of spacetimeexhibiting gravitational acceleration so strong that nothing—no particles or even electromagnetic radiation such as light—can escape from it.In many ways, a black hole acts like an ideal black body, as it reflects no light.
The first modern solution of general relativity that would characterize a black hole was found by Karl Schwarzschild in 1916, although its interpretation as a region of space from which nothing can escape was first published by David Finkelstein in 1958. Black holes were long considered a mathematical curiosity; it was during the 1960s that theoretical work showed they were a generic prediction of general relativity. The discovery of neutron stars by Jocelyn Bell Burnell in 1967 sparked interest in gravitationally collapsed compact objects as a possible astrophysical reality.
The first modern solution of general relativity that would characterize a black hole was found by Karl Schwarzschild in 1916, although its interpretation as a region of space from which nothing can escape was first published by David Finkelstein in 1958. Black holes were long considered a mathematical curiosity; it was during the 1960s that theoretical work showed they were a generic prediction of general relativity. The discovery of neutron stars by Jocelyn Bell Burnell in 1967 sparked interest in gravitationally collapsed compact objects as a possible astrophysical reality.
On 11 February 2016, the LIGO collaboration announced the first direct detection of gravitational waves, which also represented the first observation of a black hole merger.On 10 April 2019, the first ever direct image of a black hole and its vicinity was published, following observations made by the Event Horizon Telescope in 2017 of the supermassive black hole in Messier 87's galactic centre.
The simplest static black holes have mass but neither electric charge nor angular momentum. These black holes are often referred to as Schwarzschild black holes after Karl Schwarzschild who discovered this solution in 1916.
The shape of the event horizon of a black hole is always approximately spherical.For non-rotating (static) black holes the geometry of the event horizon is precisely spherical, while for rotating black holes the event horizon is oblate.
NASA released a visualization of what a black hole might look like up close, and it’s mesmerizing to see.
The visualization simulates how a black hole’s dense gravity would distort our view, resulting in a warped image that resembles a reflection in a carnival mirror. In more scientific terms, NASA says it “simulates the appearance of a black hole where infalling matter has collected into a thin, hot structure called an accretion disk.”
A black hole forms when a star collapses at the end of its life. The gravitational pull that results from its collapse prevents anything — including light itself — from escaping.
A black hole forms when a star collapses at the end of its life. The gravitational pull that results from its collapse prevents anything — including light itself — from escaping.
Scientists are trying to learn more about the elusive and mysterious black holes that make up our universe.Black hole has a diameter of about 78 billion miles. For perspective, that's about 40% the size of our solar system, according to some estimates.
Closer to home is the black hole known as Sagittarius A*, which is in the center of our galaxy.
Closer to home is the black hole known as Sagittarius A*, which is in the center of our galaxy.
We also now have an idea of what a black hole might sound like, thanks to physicists from the Massachusetts Institute of Technology. Earlier this month, their findings published in Physical Review Letters reported that a “baby” black hole makes a sound like a chirp. Scientists described the sound as “a waveform that quickly crescendoed before fading away,” or, something resembling the sound of a “chirp.”
The nearest black hole to the Earth we know of is V616 Monocerotis, also known as V616 Mon. It's located about 3,000 light years away, and has between 9-13 times the mass of the Sun.
Black holes are freezing cold on the inside, but incredibly hot just outside. The internal temperature of a black hole with the mass of our Sun is around one-millionth of a degree above absolute zero.A black hole is anything but empty space. Rather, it is a great amount of matter packed into a very small area - think of a star ten times more massive than the Sun squeezed into a sphere approximately the diameter of New York City.
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