Existance of other life in our universe!?

Question

Do any of the scientists know or have they proven that ,as we know eventualy or sun will grow like all bigs stars do and then collapse into themselves,now , how many stars has that happened to since they begin of the universe?And what is the propabilty of previous solar systems like ours were created,a sun like ours was created,then destoyed itself leaving black hole and all evidence of its existance destroyed????

Answer 1

May be some alien in some distant planet is asking the same question.

Answer 2

Currently, the Sun is undergoing fusion: 4 Hydrogen burning to Helium. Our Sun will shine as it is for about another 3 to 5 billion years! It will then evolve into a Red Giant over a few more billion years. Scientists arrive at this estimate by calculating how fast the hydrogen in the Sun's core is being converted to helium. Approximately 37% of our Sun's hydrogen has been used since it formed four and a half billion years ago.Once the Sun runs out of nuclear fuel, it will collapse to a white dwarf.

In the early Universe there were no elements heavier than helium. The first stars were composed almost entirely of hydrogen and helium and there was no oxygen, nitrogen, iron, or any of the other elements that are necessary for life. These were all produced inside massive stars and were all spread throughout space by such supernovae events. Nobody has anything even approaching an accurate count for stars in the Universe now, or in the past. There are simply too many. With billions of galaxies, each containing at least 200 billion stars. The further they are, the longer their light takes to reach us. Numerous stars we see today may already be long gone so they couldn't be accurately counted, nor could stars that exist but we are unable to see yet due to their light not yet reaching us.

Don't forget numerous red dwarfs we cannot see. We can't see the vast majority of them in our own galaxy, much less in other galaxies. Although I assume they are included in stellar estimates. You can round it off to the nearest trillion zillion if you like.

Astrobio Q Apr 25, 2004
The number of stars in the visible universe is estimated to be 70 sextillion, or 70,000,000,000,000,000,000,000 (seven followed by twenty-two zeros).

ESA Space Science 23 February 2004
Something like 10 to the power of 22 to 10 to the power of 24 stars in the Universe.

These estimates were made only two months apart but I liked the astrobio paragraphs describing what these sorts of numbers mean.

Such a vast population can be compared in a list of the very biggest numbers imaginable, with some terrestrial references borrowed from a combination of science and poetry:

*ten times more than the number of grains of sand on Earth
*eleven times the number of cups of water in all the Earth's oceans
*ten thousand times the number of wheat kernels that have ever been produced on Earth
*one hundred million times more than the number of ants in all the world
*one hundred million times the dollar value of all the market-priced assets in the world
*ten billion times the number of cells in a human being
*one hundred billion times the number of letters in the 14 million books in the Library of Congress

I'm feeling very small.

If a black hole doesn't contain matter is it because the matter was converted to pure energy during a sun's collapse which led to that sun becoming a black hole, along with its solar system. And that pretty well sums it up.

Answer 3

Most of the data in this subject comes from mathematical models.

The mathematical models show that our star will expand to a red giant and eventually collapse into a white dwarf.

There is a zero percent chance that a solar system formed exactly like ours, but there are several stars about the same size as ours. Our sun and start like it, don't have enough mass to collapse into black holes.

Answer 4

Countless billions of stars have already super-nova'd into oblivion. It is certainly possible that any evidence of life on a planet orbiting around such a supernova would have disappeared with the exploding red-giant.

But life in the universe is probably quite common, even intelligent life. The problem is that distances between life bearing planets are SO LARGE, both in terms of space and in terms of time, that intelligent species may never get to contact each other UNLESS they manage to sustain themselves intact for hundreds of thousands of years, at least.

Intelligent life on Earth has been present less than 100,000 years; and technological society has been present far less than just 1000 years. If we want to contact intelligent life that originated elsewhere, we will need to sustain our technological civilization for many scores of thousands of years. This may prove VERY DIFFICULT to accomplish. It is possible that VERY FEW intelligent civilizations have been able to accomplish this feat.

Answer 5

At this point, they spculate that in the distant future, everything will go cold, dark and dead. All of us/it.