sunlight still last on earth without sun?

TOM_soak

Newbie

Posts: 2

sunlight still last on earth without sun?

« on: June 29, 2011, 06:02:01 PM »

i have read( a few times) a theory or supposed "fact" that if the sun blew up and somehow earth still exist, sunlight will continue to shine on earth without a sun because the sun is so strong that light will shine on earth for another something million years. My question is- is this fact or theory true? if it is true then why is it that when a part of earth's surface is facing the sun, that part is in sunlight and the surface that is not facing the sun is dark, causing day and night. if the fact is true then wouldn't it not matter where the earth is positioned? wouldn't all of the earth be covered in sunlight 24/7 no matter what part of earth is facing the sun?


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Ryan

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Posts: 24

Re: sunlight still last on earth without sun?

« Reply #1 on: June 29, 2011, 06:17:40 PM »

You are missing the point here, if the sun exploded the earth would go with it. So it doesn't matter.
To answer your question though, sunlight wouldn't continue to shine on earth.....Wear would it come from? The black hole that use to be our sun? Really our sun isn't even that powerful.


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Justin_H

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Posts: 3

Re: sunlight still last on earth without sun?

« Reply #2 on: June 29, 2011, 06:31:51 PM »

That's complete fantasy. If it's dark outside and your lightbulb burns out, is your room still well lit? Of course not because there would no longer be a source of light. Regardless of how bright a light source is, it is the thing making the light and when it is gone no more will be made.


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Oscar_C

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Posts: 3

Re: sunlight still last on earth without sun?

« Reply #3 on: June 29, 2011, 06:42:22 PM »

Well, I've dabbled quite a bit in astronomy, and I remember something like that being discussed. It's a theory because it's impossible to indefinably prove at this point. The theory is that the blast itself would create a semi-permanent layer of light on earth for millions of years. It is very similar to the atomic bomb (not trying to bring up a horrible subject, but it's the best example I have), When it exploded, it preserved the shadows of people onto the ground, walls, etc. The effect would be by far much greater than the Atomic bombs, and the thought is, it would preserve light onto the surface of the earth's surface. Hope that explains some of it.


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Eric_Trevor

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Posts: 4

Re: sunlight still last on earth without sun?

« Reply #4 on: June 29, 2011, 07:11:15 PM »

For about 8 minutes.


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Alan

Newbie

Posts: 10

Re: sunlight still last on earth without sun?

« Reply #5 on: June 29, 2011, 07:18:37 PM »

If the sun dissapeared now, you would still enjoy sunbathing for another 8 minutes 'cause it's 8 light minutes away.

If all the stars went out now you would still see stars for many yaers 'cause they're light years away, you would still see the andromeda galaxy for another two million years 'cause of it's distance


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