could there be a sun out there so big that its destruction would annihilate the universe?

Question

or would we have seen it if it were that big?

please read the details of my other question here and help me figure that out

http://answers.yahoo.com/question/index;_ylt=AjhgW3lieR7zqcFX31.p1d_sy6IX?qid=20070818145650AA8hcfV

okay what about not the whole universe but just us,

Answer 1

If a star went supernova close to our system, it could destroy our solar system completely, or it could just destroy all life on Earth (from the gamma and xray radiation the supernova would generate).

But it would have to be within a few light years (maybe at most 10) for a supernova to be that destructive to us.
A supernova farther away (maybe up to 50 light years) could still do some damage - the cosmic radiation would increase and that could lead to damage to our magnetosphere (and therefore problems with all electronics and satellites). It could cause an increase in health problems (especially cancer and birth defects) not just in people but in the animals, insects, and plants. That could cause famine and widespread global ecological damage.

Scientists have studied the stars in our neighbourhood, and they are all just too small to end up as supernovas.
Even Sirius, at 8.6 light years away and the brightest star in our sky is only about twice the mass of the sun, that's still not quite big enough to be a supernova.

Supernovas are destructive, and can cause all kinds of damage in their immediate neighbourhood. Some of the expanding shells of debris we have seen are hundreds of light years across. But as the shell expands it thins out, so even though they look bright they are very sparse (not much more than the density of space).
Supernovas do generate shock waves in space, and those waves can stir up nebulas and clouds of dust and gas, starting them to moving and condensing and eventually forming new stars.
If a supernova was within say 50 light years, we would be able to detect that shock wave but it would be so weakened by distance it wouldn't be dangerous to life on Earth.
However, that shock wave could influence the orbits of debris in the Oort Cloud and possibly send a lot of comets into the inner solar system.

Answer 2

Even the biggest stars cannot bring about the end of the Universe. The first stars are though to have had hundreds of times more mass than the Sun, and shone with millions of times the Sun's luminosity. Because they had no elements heavier than lithium, they were able to get much larger than later generations of stars. They were the most massive stars that ever existed, and when they exploded as supernovae, they didn't annihilate the Universe. Instead they seeded it with the heavier elements that now make planets and life possible. These stars give rise to gamma ray bursts that can be detected billions of light years away by orbiting satellites. They have not been seen directly yet, but the James Webb Space Telescope is expected to find them. If there was a star whose demise would also destroy the Universe, it would have been detected long ago.

Answer 3

The universe is infinite. It would take a sun of infinite size to destroy the universe. In that case, we would already be dead :-D

Even if the universe is not infinite under the strict definition of the term, it is truly gargantuan in size. There is no way there is a sun that big out there. I don't think something that big would even be remotely close to stable (ie: it would never form).

We would also have long ago detected something of that size, and it would probably be bright enough to be seen in the day.

There are many many many reasons that all point to "no"

Answer 4

No. Death of suns in simple terms:
Our sun: expand, then shrinks to a dead core
Bigger suns: supernova, then black hole
Even bigger suns: big supernova, then nothing. It destroys itself by the supernova

Death of a really big sun can destroy a solar system, but the universe is a very big place. For a sun to destroy it, it'd have to occupy a substantial amount of space (no pun intended), and we would have found it by now.

Answer 5

No. Not even close.
There are physical limits to the mass of gas that a star can accrete. The excess is blown away before it can fall in.

Answer 6

not even close. the largest supernova ever recorded was in 2006, and that caused no damage to anything.

Answer 7

NO!