The dusty rubble from the ashes might ultimately stick together to form planets. What do you think?
127269
Yes, new stars and new planets can form from the remnants of dead stars.  We can see this process happening, although it is extremely slow, a process that take millions of years.\n\nEven our sun is thought to be a 3rd generation star.  When our sun dies, it will expand to become a Red Giant star, eventually cooling/contracting into a white dwarf, as this happens, a lot of stellar meterial will be released and will float off into space to make new stars in the future.
209423
Some massive stars don't just fuse hydrogen into helium to burn. By the process of nuclear fusion the most massive stars will continue to fuse helium, lithium and even heavier elements in the periodic table as high as iron before they go super nova. When these stars go super nova even heavier elements such as Uranium can be formed.\nThe resulting nebula from the super nova will be rich some elements required to make rocky planets such as our own.\nPlanets are formed around stars in much the same way as stars . . . by gravity.\nNebula's can be quite lumpy. The more dense bits will, by the force of gravity, attract more matter, and become more dense, thus attract even more matter and so on.\nThis process will always end up with matter starting to spin. The Star that is forming in the middle will be surrounded by a spinning disc of gas and dust. This is called the accretion disc.\nThe accretion disc is also lumpy and the same process that forms the star also takes place, however as there is a lot less matter, these lumps rarely reach the pressures and temperatures required to start nuclear fusion and form stars, and so they condense into rocky planets, asteroid, or gas giants, depending on the composition of the matter that was there to start with.\nWhen there is enough matter in the accretion disc a binary star system is often formed.\nOne interesting fact is that if our solar systems Jupiter was four times more massive it would likely have been another smaller star.\nHope this helps!!!
394940
Well astronomers think the expansion of the universe is actually accelerating, so what you are proposing probably will never come to pass.  Anyway for a civilization to survive a "big crunch" if it happened, would have to far far far more advanced then anything we could possibly imagine.
504448
They have been and will be... meteors and other foreign objects entered earth have some microbes in it. Some would survived along the way if they could withstand the burning heat as they hit the earth's atmosphere.
462641
Must have been some terrific star ship if one ship could help earth people kill everything in the universe.\nSince we can see out 13.8 billion light years, that's a heck of a lot of space to rocket around in to find everything to kill.\nBut since there are still some earth people left, maybe we'll just repopulate the universe.
639179
Defiantly, I think that's how the world will end. I think and can all but prove my theory. Ozone is what protects us from the sun. all of the nine planets in our solar sys have had ozone at one time. out of the the first 4 planets we are the only planet left with ozone the other 3 are all charred and burned. THAT'S THE  EXACT THING THAT WILL HAPPEN TO US IF THAT HOLE IN OUR OZONE CONTINUES TO GROW . WE WILL BURN AND BECOME THE FOURTH CHARRED PLANET. along with mercury Venus and mars. That's what happened to them. Their ozone depleted and they burned.
554840
I think you were watching a sci-fi show, maybe artist's conceptions of planets in other systems. We can confirm that the other planets exist by watching for gravitational anomolies but our tech isn't up to the task.
570127
When the cloud of gas and dust that formed the sun began to gather together to form the sun, some of it didn't get sucked in by the increasing gravity at the center, but gathered together into less-dense "rings" around the newly-formed sun.\n\nThen gravity did its magic on those gases and dust, gathering them together into smaller balls, the planets. Around some of them were still smaller rings, which gathered together into moons, or, in some cases, more widely dispersed rings.\n\nIf you play with water, stirring it with a pencil to create a little whirlpool, then drop little bits of soil or even food coloring into it, you'll get a feel for how it might have happened. It's not the same, but if you watch it and try, you can imagine how it might have happened.\n\nThen, of course, you'll start wondering about hurricanes. <g>
171627
The sun is a star. When it becomes a red giant the earth will be vaporized. thats a few billion years off but it will happen. So yes it does.
627230
Yes I do.  I think that it is humanity's destiny to populate the galaxy.  One stray asteroid could destroy all human life if we are all on one small planet.
353642
our earth is about 4.5 billion years old.\nwell its a mystery that whether all the planets have been created atonce,but\naccording to the big bang theory there was a large explosion resulting in te formation of planets.\nnoone can say this is true or not..
31894
It's a cycle of death and rebirth. A star will eventually go supernova, explode, and create stardust. These elements condense over millions of years to form a new star and new planets. This simple fact leads many scientists to the conclusion that a higher being must exist since it seems so neat and convenient to be just random chance. It seems like too useful a cycle, in other words. Like it was designed as such.
386458
It wont ever go supernova . Its to small for that\nWhat will happen though is it will swell up as a red giant .    After swallowing the earth and all the planets  it will eventually shrink to a cold dense white dwarf star.\nBut no need to worry this is a long time in the future.
304609
If the Tooth Fairy waved her magic wand and ...\nAre you serious?\nDividing the Earth in two parts without damaging the surface would require ... magic.\n(Of course Arthur C. Clarke did once point out that any sufficiently advanced technology would appear as magic but we're talking an asteroid strike, not super-technology.)\nIf a body large enough to blast the Earth apart struck, there would be nothing presently on the surface that would survive in recognisable form.\nI suppose it's imaginable that two bodies mutually orbiting a common center of gravity, might accrete from the resulting debris. The oceans would have been vaporised. Some water would recondense and wind up on our hypothetical twin Mini-Earths but I imagine on the whole they'd be pretty dry. Bacteria living in deep crustal rocks blown clear of the remains of the planet would probably  survive and as this debris was gravitationally 'swept up' over time by the newly formed pair of mini-Earths life would be re-seeded and we'd be back at 'Square One'.
276699
It might be possible although it'll be a lot more expensive than building space settlements and there is also the issue of the lower gravity (we don't know how that will affect the colonists).\n\nIf the gravity issue is solved we might be able to colonise the planet in that timeframe.  The materials needed are mostly there but we'd have to bring a lot of technology and softland it on Mars.  This will include mining technology, fabrication technology and power sources (probably nuclear).\n\nWater could be a problem but we should be able to import it from asteroids and comets so if there isn't any left on Mars it can be obtained from elsewhere without too much trouble.
295430
I worry more about mass extinction events like an asteroid impact or finding out that giant aliens have just been raising humanity as a food source to harvest en masse. Bird flu might do a job on us or some alien organism brought back by space exploration which our bodies are unable to manufacture antibodies. Maybe global nuclear conflict will leave the earth a smoking glow-in-the-dark beacon rotating and wobbling in the solar system. Excuse me I have to go find my aluminum foil hat to block the gamma rays. Wait what if planet Jupiter is a brown dwarf star and decides to go nova? What if the sun flames out? What if the magma in the earth's crust makes the poles flip positions? .........
445432
It's not so much the Martian life that might have been there, but rather, the Earthly life that we could send there in the event of, oh say, an anticipated global-killer meteor hit here until everything cooled down and Earthly re-seeding could begin. Aside from that, we humans, we explore.