background preloader

The Largest Black Holes in the Universe

Related:  Universe

Speed of the Milky Way in Space As we all know, a galaxy is a massive ensemble of hundreds of millions of stars. The galaxy where we live in today is called the Milky Way. The name itself came from the ancient Greek galaxies kyklos, or ring of milk, due to its faint milky appearance. Our Milky Way is a large spiral galaxy. Black Holes NOTE: This section is about stellar-mass black holes. For information about black holes that measure in the billions of solar masses, see Active Galaxies & Quasars . There are many popular myths concerning black holes, many of them perpetuated by Hollywood. Television and movies have portrayed them as time-traveling tunnels to another dimension, cosmic vacuum cleaners sucking up everything in sight, and so on. It can be said that black holes are really just the evolutionary end point of massive stars. But somehow, this simple explanation makes them no less mysterious, and no easier to understand.

Neutron star Neutron stars contain 500,000 times the mass of the Earth in a sphere with a diameter no larger than that of Brooklyn, United States A neutron star is a type of stellar remnant that can result from the gravitational collapse of a massive star during a Type II, Type Ib or Type Ic supernova event. Neutron stars are the densest and tiniest stars known to exist in the universe; although having only the diameter of about 10 km (6 mi), they may have a mass of several times that of the Sun. Neutron stars probably appear white to the naked eye. Neutron stars are the end points of stars whose inert core's mass after nuclear burning is greater than the Chandrasekhar limit for white dwarfs, but whose mass is not great enough to overcome the neutron degeneracy pressure to become black holes.

Gigantic Black Hole Discovered From the Dawn of Time Michael D. Lemonick Astronomers have identified a mammoth black hole weighing as much as 12 billion suns. It's not the biggest black hole ever found, but it's astonishingly young. How fast is our galaxy moving through space "The Milky Way and the Andromeda galaxy are approaching each other with a speed of 300,000 miles per hour." or 130 km/s As we all know, a galaxy is a massive ensemble of hundreds of millions of stars. Privacy and Security Fanatic: Busted! DOJ says you might be a felon if you clicked a link or opened email We may be doomed and you are probably a felon if you ever used a fake name online, used a bogus birthday to register on a site, or fibbed about your height or weight on an online dating profile, named a different town or city in a profile, or basically didn't tell the exact truth anywhere online. Never done that? No problem, then you're probably busted under the "obtains information" portion of the Computer Fraud and Abuse Act (CFAA).

BLACK HOLES by Ted Bunn What is a black hole? --------------------- Loosely speaking, a black hole is a region of space that has so much mass concentrated in it that there is no way for a nearby object to escape its gravitational pull. Since our best theory of gravity at the moment is Einstein's general theory of relativity, we have to delve into some results of this theory to understand black holes in detail, but let's start of slow, by thinking about gravity under fairly simple circumstances. Suppose that you are standing on the surface of a planet. You throw a rock straight up into the air.

Neutron Stars - Introduction Neutron stars are compact objects that are created in the cores of massive stars during supernova explosions. The core of the star collapses, and crushes together every proton with a corresponding electron turning each electron-proton pair into a neutron. The neutrons, however, can often stop the collapse and remain as a neutron star.

Astronomers Discover A Supermassive Black Hole Dating To Cosmic Dawn A supermassive black hole, like the one illustrated here, has been discovered 12.8 billion light years away, at the center of an exceptionally bright quasar. NASA/JPL-Caltech hide caption itoggle caption NASA/JPL-Caltech A supermassive black hole, like the one illustrated here, has been discovered 12.8 billion light years away, at the center of an exceptionally bright quasar. NASA/JPL-Caltech

NASA finds extra-terrestrial amino-acids in Sudan meteorites Earlier this month, NASA announced the discovery of bacteria living in arsenic in a California lake. Now they have uncovered ET amino-acids in meteorite fragments that landed in northern Sudan. The meteorite was a fragment of a parent asteroid measuring 13-feet-wide (4m), and weighing 59-tons. Privacy and Security Fanatic: What happens if you catch a hacker and must deal with the FBI? After writing an article about a Department of Justice report, stating the FBI focuses on catching kiddie porn perps and many agents lack the know-how to work on national security issues, I was contacted by a man who says he's worked with the FBI to catch hackers. You might be surprised at how hard it can be for an IT professional to work with the FBI on a hacker case. This is one IT professional's story. His name is Scott Johnson and this particular story recounts his third time catching a hacker. For starters, if you work with the FBI, Johnson says don't expect to get any credit or a public thank you.