Is there life beyond Earth? A astronomy class with Dr Stuart Clark

A supernova is a stellar explosion. They can occur when a large star exhausts its ability to fuse hydrogen into higher elements, and its core collapses. The resulting rebound rips apart the outer layers of the star, creating a supernova while the remains of the core collapses into a neutron star. Another type of supernova, known as a thermal runaway or type Ia, occurs when a white dwarf is a close companion with another star. As outer layers of the companion are captured by the white dwarf, it can trigger a runaway nuclear reaction that rips apart the white dwarf.

This latter form always has about the same absolute brightness, which is why they are used to measure the distances of far galaxies. A type Ia supernova, you might imagine is incredibly bright. The amount of energy released by such a supernova is more than the amount of energy the Sun will release in its entire lifetime. Now imagine a supernova ten times more powerful than that.

Such a stellar explosion is known as a superluminous supernova, or hypernova. I think the Great Attractor is evidence for an alternate universe. A good question with a bad answer. A more likely answer is that at 1 billion years young, our universe was smaller less space , and because there was less space, there was less time since they are relative , and hence, fully formed stars and galaxies that we see at the edge of our cosmic horizon!

This is not a good title for this article. This is only the most luminous galaxy that we have yet discovered in the universe. There may be others still waiting to be discovered by the James Webb telescope.

Multiverse: have astronomers found evidence of parallel universes?

So have WISE survey again to give a better idea of how to find these suckers. This time survey properly. There can't be just one object in the universe this bright. It's not doing anything terribly important right now; The Earth has been here forever and so have those rocks out there. Watch the merger maniacs squirm for a patch.

Arguing against a parallel universe

Violates the Eddington limit multiple times Just can't fathom that the matter forms from the unseen within. More puzzlements will be found, and more squirming will ensue. Long live the Huge Bang Fantasy, despite the evidence!

Planck's 'almost perfect' universe could point to new physics

This is for those who believe photons are massless, photons are simply mass moving at the the speed of light. But think about it. If your proposed 'answer' was correct, then practically all galaxies at similar distance would be similarly 'gigantic'.

Not only that, but some observer looking at us from those galaxies would be observing similarly gigantic galaxies. What happened to them?

Most galaxies in our neighborhood are nowhere that scale. Which makes the mainstream 'galaxy merger' scenarios even less likely, since our and neighboring galaxies seem to have 'shrunk' since a supposed Early Big Bang epoch which supposedly produced such a gigantic galaxy. Conservation of angular momentum. With our current technology, we are limited to observations within this universe because the universe is curved and we are inside the fishbowl, unable to see the outside of it if there is an outside. There are at least five theories why a multiverse is possible , as a Space.

Super Luminous - One Universe at a Time

We don't know what the shape of space-time is exactly. One prominent theory is that it is flat and goes on forever. This would present the possibility of many universes being out there. But with that topic in mind, it's possible that universes can start repeating themselves. That's because particles can only be put together in so many ways. More about that in a moment.

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Another theory for multiple universes comes from "eternal inflation. Others, however, will keep getting larger. So if we picture our own universe as a bubble, it is sitting in a network of bubble universes of space. What's interesting about this theory is the other universes could have very different laws of physics than our own, since they are not linked. Or perhaps multiple universes can follow the theory of quantum mechanics how subatomic particles behave , as part of the "daughter universe" theory.


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  • Alternate Reality?

If you follow the laws of probability, it suggests that for every outcome that could come from one of your decisions, there would be a range of universes — each of which saw one outcome come to be. So in one universe, you took that job to China. In another, perhaps you were on your way and your plane landed somewhere different, and you decided to stay. Another possible avenue is exploring mathematical universes, which, simply put, explain that the structure of mathematics may change depending in which universe you reside.