Supernovae

Because for a star to fuse elements heavy elements (iron and heavier) it would actually consume energy rather than liberate it. That doesn't work well to keep the star "alive." The explosion of the supernova itself can create these heavier elements because of the heat of the blast.

After a supernova, the stellar core may remain as a neutron star or, for more massive stars, collapse into a black hole. Neutron stars are extremely dense, composed almost entirely of neutrons, while black holes have such strong gravity that not even light can escape from them.

Compared to a supernova, a nuclear bomb would be like a puff of breath in a hurricane. Even a SMALL star is the equivalent of millions of hydrogen bombs PER SECOND, and a supernova is billions of times more powerful.

However, a nuclear explosion IS like one grain of sand out of the center of a star; with a temperature of millions of degrees for a tiny fraction of a second.

No one knows for sure, since there is not enough information to figure it out. After a supernova, the star will either turn into a black hole, a neutron star, or a pulsar. But, there is no scientific evidence that proves which one the star will turn into after a supernova.

The star that exploded is never going to become a new star, since a lot of the star imploded too, and it's now a super-dense neutron star. If it's really lucky it's a black hole. The part that will create new star formation is the gas and various elements that escape in the explosion, forming nebulae. Over time these clouds of gas find gravitational centres, and eventually materials attract and form new bodies. Everything here on earth was once part of a dying star!

After a supernova, the dust and gas will expand into space, eventually cooling and forming new stars, planets, and other celestial bodies. This process enriches the interstellar medium with heavy elements produced in the supernova, which are essential for the formation of new solar systems.

Unlike the other types of supernovae, Type Ia supernovae generally occur in all types ofgalaxies, including ellipticals and they show no preference for regions of current stellar formation - they can occur anywhere in the Milky Way Galaxy.
The reason for this is that Type 1 supernovae occur when the remnant of a small star (a white dwarf) accreets enough mass (by gas capture from, or merger with another star) to exceed the Chandrasekhar limit of about 1.38 solar masses. When this mass is exceeded carbon fusion is reignited in the stellar core and the star explodes and as white dwarf stars are to be found everywhere in Galaxies and Globular clusters, the potential for Type 1 supernovae is universal. That said, obviously you would not expect to find White Dwarf stars in current star forming areas (because the dwarf forms at the end of a stars main sequence life). However Galactic rotation mixes old stars with new stars relatively quickly and this separation rapidly blurs.

If we're just SEEING the supernova now, although it was in a galaxy 160K light years away, then it actually exploded 160,000 years ago. The light has been on its way to us (actually, expanding in all directions!) for 160,000 years.

If it were to explode right now, we wouldn't know about it for another 160,000 years.

This may become an important point some day. The red giant star Betelgeuse, the shoulder of Orion, is about 600 light years away. As a giant star, it burns very quickly and will "soon" explode. ("Soon" is relative to the lives of stars, not people. It may be any time within the next half-million years.) In fact, it may have already exploded - and we wouldn't know it until the light arrives here, hundreds of years later!

Higher, as the increased star formation rate increases the population of massive stars that can lead to supernovae explosions. Starburst galaxies have a higher concentration of gas and dust, leading to more frequent and intense supernova events compared to a galaxy like the Milky Way.

It is precisely the supernovae that created those elements and dispersed them into space.

It is precisely the supernovae that created those elements and dispersed them into space.

It is precisely the supernovae that created those elements and dispersed them into space.

It is precisely the supernovae that created those elements and dispersed them into space.

No, Sirius will not become a supernova. It is a relatively young star compared to those that typically go supernova, and its mass is not sufficient to trigger such an explosive event. Sirius is expected to eventually evolve into a white dwarf.

Unfortunately not.

We can tell which stars are likely to go Supernova, but our time frame is limited to hundreds if not, closer to thousands of years.

Viewable supernova are rare and therefore we have not been able to study them sufficiently with modern instruments to gain an insight into their workings. As more and more supernova are observed our predictions could become better, but not for a long while.

Yes, the Benelli Super Nova is capable of shooting steel shot as long as the barrel and choke are rated for steel shot use. Make sure to check the manufacturer's guidelines to ensure safe and effective shooting.

It would depend on how close the propagator star was.

The closest and most probable supernova event will be Betelgeuse at 600 light years. However, for the gamma rays to have a serious affect, the star needs to be less that 100 light years away.

In Japanese, "supernova" is called 超新星 (cho-shinsei).

Supernovas [See Link] are classified according to the absorption lines of different chemical elements that appear in their spectra. The classification can be simplified to Type I or Type II Type II - If a supernova's spectrum contains a line of hydrogen in the visual portion of the spectrum. Type I - all the rest. These are broken down even further. Type:- Ia - When a white dwarf merges with another star. Ib & Ic are formed by massive stars running out of fuel but have lost the outer layer of hydrogen and helium like Wolf-Rayet stars Type II are the "normal" types of supernova, where massive stars can no longer maintain hydrostatic equilibrium and the core collapses IIP Reaches a "plateau" in its light curve IIL Displays a "linear" decrease in its light curve Supernova [See Link] classifications are based on chemical composition.

There are records of visual observations dating back as far as 185 CE. Since observation technology has increased, more and more stellar remnants are observed

In 2008 an actual supernova explosion was caught on camera.

Supernova only occur about once every fifty years, so they are not that common.

See link for more information.

The explosion of novae hardly disturb the white dwarf or its companion star. Mass transfer resumes and a new layer of fuel can accumulate so that the process can happen all over again. In a supernovae, its the death of a star. Its theory that the outer layers of a massive star produces the supernovae while the core collapses to form a neutron star or black hole.

A near Earth supernova [See Link] is a supernova that occurs close enough to the Earth (less than 100 light-years away) to have noticeable effects on its biosphere. Gamma rays from a supernova induce a chemical reaction in the upper atmosphere, converting molecular nitrogen into nitrogen oxides, depleting the ozone layer enough to expose the surface to harmful solar and cosmic radiation. This has been proposed as the cause of the Ordovician extinction - [See link], which resulted in the death of nearly 60% of the oceanic life on Earth. Type Ia supernova [See Link] are thought to be potentially the most dangerous if they occur close enough to the Earth. Because these supernova occur from dim, common white dwarf stars, it is likely that a supernova that could affect the Earth will occur unpredictably and take place in a star system that is not well studied. The closest known candidate is IK Pegasi [See Link] Recent estimates predict that a Type II supernova would have to be closer than 26 light-years to destroy half of the Earth's ozone layer.

supernovae provide events of known intrinsic luminosity ("standard candles") that can be used for distance measurement to, for instance, nearby galaxies they can also be used to determine when other stars will have a supernova. They are also the death of a star and the birth of a black hole.

So far, all observed Supernova have been so far away, that although it is visible, it is not that bright. If the Supernova was a lot nearer, then yes it could turn night into day but it's just as likely you will be killed by the shockwave or the immense radiation outburst.

SN185 remained visible in the night sky for eight months

SN1604 was visible to the naked eye, and was brighter at its peak than any other star in the night sky, and all the planets, with the exception of Venus.

When a single high mass star explodes, it undergoes a supernova event. The core collapses inwards and then rebounds explosively, sending out a shockwave that ejects the outer layers of the star into space. This explosion can outshine an entire galaxy for a short period of time.

Very. Hundreds to millions of times the solar output, squeezed into a few seconds. A supernova at one of our closest neighbors would end all life on Earth.... not maybe from the blast, but at least from retaining heat from our own Sun.