what would happen to the stars if there was no sun ?
plz help me
Answers
Life without our Solar System’s only star would be rather uncomfortable, to say the least.
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Solar eclipse
This question carries with it immense complications owing to the Sun’s influence on the Solar System, so we’ll take a hypothetical look at it first from the perspective of the motion of bodies in the Solar System.
Anything in orbit around the Sun is basically moving fast enough to be in a constant state of freefall towards it. If the planets, for example, suddenly stopped moving they would immediately be pulled towards the Sun and fall into it.
So, let’s imagine that, due to some unknown reason, our Sun suddenly vanished. In this instance all the planets, asteroids, comets and whatever else would retain their forward motion. Therefore, rather than fall towards the now nonexistent Sun, they would fly off in a straight line into space.
What happens next is anyone’s guess. Some of the planets might gravitationally interact with one another, especially as the inner planets are moving faster than the outer planets and would potentially ‘catch up’ to them. Otherwise, the likelihood is all the objects would continue to move in a straight line through space out of the Solar System, and it would be many thousands of years before they came into the vicinity of another system or object.
Of course, for us on Earth, the consequences would be pretty dire. On the plus side, our planet retains heat rather well, so we wouldn’t freeze to death instantly. Also, as light from the Sun takes eight and a half minutes to reach us, we’d have a final few moments of glorious sunshine before our planet was bathed in darkness.
Those on the night side wouldn’t notice much difference until, a few seconds after day-dwellers were thrust into darkness, the Moon suddenly disappeared as it no longer had the Sun’s light to reflect. The planets in the sky would follow suit, disappearing one by one as the wave of darkness reached them.
Eventually, though, the lack of the Sun’s radiation would leave us pretty chilly. Just think about how much colder it is at night time rather than the day, but imagine that same temperature drop constantly occurring.
Within days the world would be a hundred or so degrees below freezing, and within weeks it’d be just 50 or so degrees above absolute zero. The atmosphere itself would also freeze and fall to Earth, leaving us exposed to the harsh radiation travelling through space.
Life as we know it would have to adapt to survive to our new frozen Earth, and it’s likely only microorganisms beneath the surface could survive thanks to heat from the core. For humans, we’d probably have to pool together and build a few nuclear fusion reactors in order to last a while.
All in all, it probably wouldn’t be that preferable for the Sun to disappear but, if it did, at least our days wouldn’t be numbered immediately. Just, you know, a little beyond immediat
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8 ANSWERS

Richard Chiu
Answered Jan 6, 2018 · Author has 2.9kanswers and 1m answer views
Well, the Solar system would become the primest prime real estate in the visible universe. Fortunately, it would take everyone else just as long to figure that out as it would take us to find out that all theirstars were gone.
Stars only constitute a small fraction of the mass of galaxies, so while galaxies would expand a bit from the loss of mass (unless the stars were turned into something else rather than disappearing entirely, which is what normal physics would dictate), and be a lot less easily visible, they’d still exist. The stars have very little in the way of ecologically significant impact on the Earth’s environment, humans would start to notice them winking out after a few years, and realize that something was up over the course of decades, but life in general would simply adapt as the loss of stars would progress over the course of thousands of years (only a select few lifeforms even have the ability to notice