What Happens If Our Sun Dies..

[zeilouz]

Okay,heres a thought for everybody..

We know that our moon is circling the earth due to earth's gravity..
We know that our earth is circling the sun due to the sun's gravity..

But what happens,if our sun dies n become a white dwarf..?
Will all the gravity be lost?
Will all the planets,collapsed n become unarranged?
Will we collide with other planets..?
Will our planet,be dark forever..?
N yes,ofcourse,the sun dies,means that we also die with the sun..

[Chris Peterson]

But what happens,if our sun dies n become a neutron star..?
Will all the gravity be lost?
Will all the planets,collapsed n become unarranged?
Will we collide with other planets..?
Will our planet,be dark forever..?

Our sun is not massive enough to become a neutron star. It will eventually become a white dwarf. It will have most of its original mass, but will be about the size of the Earth. Although it won't be sustaining fusion, it will be hot for a long time, so the Earth won't be dark (the cinder of the Earth, really, since it would have been inside the Sun during its red giant phase). In billions of years it will cool enough that it stops putting out visible light.

Gravitationally, there will be no change. The planets (assuming they have otherwise survived) will continue to travel in similar orbits, altered only slightly by the minor mass reduction of the Sun after it sheds its outer layers in the process of becoming a white dwarf.

[zeilouz]

White dwarf..>.<..my bad forgotten about it..

Well i dont think earth might survive if the sun will become a white drawf soon..

[Chris Peterson]

Well i dont think earth might survive if the sun will become a white drawf soon..

It is possible for the Earth as a planet to survive the process of our Sun becoming a white dwarf. A red giant is tenuous and cool enough that a planet might continue to orbit inside it. However, the Sun will also have shed mass, so the planets will be in more distant orbits. In any case, the Earth will be reduced to a hot, dry, mostly atmosphereless rock. It may still be here, but obviously won't be harboring any life. Once the red giant collapses into a white dwarf, the rocky Earth might be bombarded with x-rays, since the Sun as a white dwarf will be very hot for a long time.

[harry]

Hello All

Our sun's life is about another about 4 Gyrs in that time the solar system according to some will go through a nebulae of some form and possibbly even meet with another form of compact star. 20 times if not more

So! the chances of rejuvination or been eaten up are not so off.

If by chance rejuvination than the sky is the limit, so to speak.

If it meets with a compact star greater than itself than bye bye charlie.

http://curious.astro.cornell.edu/questi ... number=402

Knowing that our solar system does not just stay in one place as it revolves around the center of the galaxy, how long will it take for our solar system to move out of the spiral arm it is currently in (the orion arm) and into a different one? Also, will it stay roughly the same distance away from the center of the galaxy or will it move back (towards) and forth (away) from the center?

The solar motion on top of it's circular orbit about the centre of the Galaxy (which has a period of about 230 million years) can be described by how fast it is going in three different directions

U = 10 km/s (radially inwards)
V = 5 km/s (in the direction of Galactic rotation)
W = 7 km/s (northwards out of the plane of the Galaxy)

Of course the Sun won't keep on going in this direction forever. In fact we approximate it's motion by an 'epicycle' on top of the mean motion around the Galaxy. The period of oscillation in and out of the plane of the galaxy (up and down) is about 70 million years. This means that we pass through the Galactic midplane about every 35 million years which some people have compared with the period between mass extinctions on Earth to come up with yet another doomsday theory. In fact it is true that the number of cosmic rays which hit the Earth will increase during the (about a) hundred thousand years we are closer to the Galactic plane. There have also been some plausible theories about the overall temperature of the Earth increasing (with the relevent climatic changes that implies).

So! start packing.

http://www.knowledge.co.uk/sis/

http://www.aeonjournal.com/

[zeilouz]

IF our sun is getting bigger n bigger and is dying,our earth would be very hot n could not sustain life anymore,so,isit possible if we go to mars n live there?

Imagine if our earth collides with jupiter if our sun dies,surely the big mass of jupiter would engulf the earth,try to imagine that..

[harry]

Hello Zeilous

Which ever way our sun goes, cool down or super heat.

Mate when the time comes, anywhere in the solar system will not be a place to live.

[BMAONE23]

Hello Zeilous

Which ever way our sun goes, cool down or super heat.

Mate when the time comes, anywhere in the solar system will not be a place to live.

We might be able to survive on one of the frozen moons like Europa or Enceladus since they would melt But would they sustain enough mass (gravity) to sustain a breathable atmosphere and not loose their newfound liquid water?

[FieryIce]

... moons like Europa or Enceladus since they would melt ... enough mass (gravity) to sustain a breathable atmosphere and not loose their newfound liquid water?

Are you sure they even have enough mass now for any kind of atmosphere?
The fact remains, subsurface would offer the most protection.

[BMAONE23]

If the Moon's water supply didn't get lost to space (no atmospheric pressure to stop it from boiling away) we would be amply protected by not going any shallower than say 15' from the surface of the new ocean worlds.

[FieryIce]

...boiling away...

I thought space was darn cold.

[Chris Peterson]

I thought space was darn cold. :lol:

Space in the Solar System is pretty bloody hot. In Earth orbit, say where you find the ISS, the temperature is around 1000K. between the planets, it can reach nearly 1 million K. Of course, the particle density is so low that you transfer almost no energy convectively, so "temperature" is largely meaningless.

In space, you are mainly concerned with radiative heat transfer. If you were floating around in space near the Earth, the part of you facing the Sun should feel a nice warmth, not unlike what you feel on any sunny day. The other half of you will be facing a 3K heat sink, so you'll probably want to rotate a bit to stay comfortable. Of course, radiation drops as 1/r^2 with distance from the Sun. When our Sun becomes a red giant, its surface temperature will be low- only a few thousand K. When it then becomes a white dwarf, its surface temperature will be high- tens of thousands K (which is hot enough to be putting out some pretty dangerous radiation besides light). It's not so easy to say where the habitable zone will end up, but there's a good chance that one could exist all through the red giant phase, and for billions of years of the white dwarf phase.

[harry]

Hello All

Take my electric blanket and coffee and the sunday paper.

She'll be right mate.

[zeilouz]

If the sun becomes bigger n our earth is coming to its end,then we should pack up n go to another distant planet or moon if we want to continue life,but,what i heard from national geographic,in some certain planet like mars,to sustain life in it,they need to pollute the environment,as for increasing the carbon dioxide level..from the carbon dioxide produce,they will try to plant some greens on that certain planet n from the carbon dioxide,they will surely produce some oxygen for humans to live..?

But what about water?In some planets,would be there be rain?

In europa,it is shivering cold,an ice ball we might say,but too make water out of it,maybe we could heat the surface up..(pretending the sun if getting bigger n makes the moon warmer)..

Is there any possibilities?

[craterchains]

The possibilities are endless, as are the varriables to the question, , ,