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Supernovae
A supernova is an explosion of a supergiant star. It will put off huge amounts of energy, much more than if all the nuclear warheads on Earth were detonated at once.
313 Questions
What is worse a supernova or a blackhole?
Blackhole are way more dangerous. Since there is only one star in our solar system and our planet will be long gone before our star even going to explode, but Black holes are worse because there are 'wondering black holes'. So there are blackholes out there in traveling the universe and eat everything up along its way so you know, there can be wondering blackholes coming to our solar system.
How do you win the 350 songs in DDR superNOVA?
To win songs you have to beat the various clubs that it gives you. Which means you have to do all these weird quests like change settings and then do songs in the clubs. Anyways, I haven't played for a while but you get songs every time you beat one of those levels and you also can get songs by getting A, AA, AAA on songs in normal play.
How is tycho's supernova important?
Tycho's supernova which he saw in Casseopia was important, as its suddenness and brightness caused him to study astromomy for the rest of his life. That resulted in many contributions to the modern understanding of stellar objects.
What would a supernova look from earth?
Nobody really knows. However we do know that is a spherical object - not an oblate spheroid - about the size of Manhattan (about 12km in diameter) with a very smooth surface. Smoother than anything on Earth.
A young one will be very hot, and it will have a massive gravitation density.
See related questions.
Does cosmic background radiation comes from supernovas?
That is not currently known for sure. Check the Wikipedia article on "Ultra-high energy cosmic rays" for different explanations about how they MIGHT be caused.
When its original source of fuel has run out for instance our sun runs on hydrogen, after the depletion of the original fuel is gone the suns core condenses creating helium were the star expands to great measures were it gets to a size were its limited supply of helium runs out either collapsing into a black hole or a dwarf star
What is the general size of supernova?
a supernova is an explosion, a moving event, so it's diameter is time dependant.
A Supernova Explosion is very loud?
Loud is a relative term used in hearing depending on what object is doing the hearing and what frequency range. For example, what is loud to dogs would be silent to humans if the sound is outside of the human hearing bandwidth 100-20,000 Hz. Loud for humans would be generally described as passing the pain threshold of hearing.
Do Supernovas form Black holes?
Sometimes. It depends on the precise conditions. The mass of the star (after blowing off its outer layers in the supernova) has to be at least 1.5 - 3 times the mass of the Sun in order for it to collapse into a black hole.
The remnants of a smaller star (but still larger than the sun; the sun is too small to become a supernova) will probably stop collapsing after the supernova at the neutron star stage.
The phenomenon that occurs when massive stars explode is a supernova. This happens to stars that are more massive than the sun. They are called hypergiants. In such a star, the core collapses leading to the explosion.
How long would it take to see a star explode on earth?
That depends on how far away the star is. If the exploding star is 1,000 light years away we would see the supernova 1,000 years later. If it is 2,000 light years away we would see it 2,000 years later.
What is a supernova What is a neutron star?
The name is a bit of a give away really. A neutron star is a lump of matter composed entirely of neutrons, thus containing a large mass (typically between 1.4 and 3.2 solar masses in a very small volume. This matter is so dense that typically one teaspoon of neutron star (5 ml) would have a mass of about 5 and a half billion tons.
How long does the process of a supernova take?
A supernova is when a massive star explodes.
The first possible supernova was after the death of the first stars, which would have been about 13 billion years ago. The last supernova could have been today.
What is remnants of a type 2 supernova?
After a star has burned out its fuel supply, exhausting the hydrogen and helium that are being fused, one of three things can happen, depending on the mass of the star.
For a star with a mass similar to the Sun, it will turn into a white dwarf and radiate its remaining heat into space for billions of years. It will end its life as a black dwarf. (Though none exist at the moment, as the universe is not old enough).
For larger stars, depending on its chemical composition and temperature, the star explodes as a supernova and usually collapses into a neutron star. If the remaining mass is large enough, the pressure will be insufficient to stop a total collapse, and the star will become a black hole.
A supernova remnant [See Link] is the structure resulting from the massive explosion of a star in a supernova. The remnant is bounded by an expanding shock wave, including ejected material from the explosion and the interstellar material it sweeps up along the way.
The supernova explosion expels much or all of the stellar material with velocities around 3,000 km/s. When this material collides with the surrounding circumstellar or interstellar gas, it forms a shock wave that can heat the gas up to temperatures as high as 10 million °K, forming a plasma.
The stages involved are:
# Free expansion of the ejecta, until it sweeps up its own weight in circumstellar or interstellar medium. This can last tens to a few hundred years depending on the density of the surrounding gas. # Sweeping up of a shell of shocked circumstellar and interstellar gas. # Cooling of the shell, to form a thin, dense shell surrounding the hot interior. This is the pressure-driven phase. # Cooling of the interior. The dense shell continues to expand from its own momentum. # Merging with the surrounding interstellar medium. After roughly a million years, it will merge into the general turbulent flow, contributing its remaining kinetic energy to the turbulence. There are three types of remnant:
* Shell-like, such as Cassiopeia A * Composite, where the shell contains a central pulsar wind nebula, such as G11.2-0.3. * Mixed-morphology ("thermal composite") remnants, in which central thermal X-ray emissions are seen, enclosed by a radio shell.
*The illumination of the gases by heating provides the spectacular light-and-shadow appearance of supernova nebulae. It is believed that these dense clouds can become the stellar "nurseries" for further generations of stars.
What is the for the tiny very dense white dwarf star that is left behind after a supernova?
Neutron Star
What is the difference between supernova and hypernova?
When you think of a star think of something like the sun, while a supernova is the explosion of a star, while its at the ending of its life span. Star: "A star is a massive, luminous ball of plasma that is held together by its own gravity." Supernova: "A supernova (plural: supernovae) is a stellar explosion." Stellar: "Stellar is an adjective referring to one or more stars." Quotes are from: http://en.wikipedia.org/wiki/Supernova
When would a star go supernova?
The sun will never be a supernova - it is much too small. Only extremely large stars become supernovas. The sun will gradually burn out someday, and the ballpark for that is 3.5 to 4 billion years from now, though it will start to expand and redden some millions of years before that.
What effect may a supernova have in a star?
Much, if not all of the material that makes up the star is expelled at extremely high speeds (up to 30,000 Km/s). The shockwave from this explosion destroys any planets or other stellar bodies within its region of influence. The shockwave also pushes all the gas and dust surrounding the star into a vast, roughly sphereical cloud, for example, 'Kepler's supernova remnant sn 1604'. This accumulation of gas and dust can can result in the growth of new stars as the gas and dust clumps together.
The expelled material contains many higher mass elements such as nickel, cobalt and silicon and the material is the main source of elements heavier than oxygen which is the 8th element out of over 100 in the periodic table.
How does a supernova or a black hole get created?
I guess in a way, you could say Supernovas do create black holes. But a supernova is a reaction from a star running out of nuclear fuel and the gravitational pull makes the star collapse in on itself. This creates the supernova, which is like an explosion that can outshine an entire galaxy before fading from view over several weeks or months. Supernovas when at it's brightest, can radiate more energy than our sun emits over 10 billion years.
Blackholes are created in the same way, the supernova is practically the explosion of the star. When a supernova has faded, it will leave behind a supernova remnant. But the supernova will create either a blackhole, and if the star was massive, a supermassive black hole, or a white dwarf. Once faded, the white dwarf will become a black dwarf.
Blackholes are a region of space in which the gravitational pull is extremly great. So great not even light can escape its pull, yet the light can never be sucked in. You could say light travels at speed "C" and a blackhole's gravitaional pull is a power of "C", cancelling each other out, the light goes nowhere. Once having being sucked past a point called "Event Horizon" on a blackhole, theres is really no escape. The Blackhole's gravitaional pull is centered at a point called singularity. There is believed a Supermassive Blackhole is at the centre of the Milky Way, the galaxy we live in. No one knows where a blackhole leads to. It could be a rip in space that could transport us to a different universe or just crush us, which its gravitional pull would most likely do as we got closer to singularity.
It is said that a hypernova can release around 100 times more energy than a supernova. Supernova's will reach temperatures of 100 billion degrees centigrade, and will release more energy in 15 seconds than our sun does in it's entire lifetime!
What is the name of the material sent into space by a supernova called?
The material sent into space by a supernova is called supernova ejecta. It includes elements such as hydrogen, helium, carbon, oxygen, and heavier elements created during the supernova explosion.
What are brightest and darkest objects in space?
Hypernovae are the brightest object in space while black holes are the darkest object in space.
Will a neutron star eventually go supernova?
No. A neutron star is left behind after a supernova. However, some gamma ray bursts may result from a collision between neutron stars.
