sunshine

harmless_little_f***

Great movie!

Binaural

I think the deal is that once the sun dies out and expands to become a red giant everything on Earth will be burnt to a cinder, hen like someone says, it becomes a white dwarf.
Ive only got a rough explanation from a book I read a few months ago, anyone know how to actually explain this?

catefrances

rigneyclan wrote:

Nothing will happen to the Universe. Stars die all the time, Supernovas are proof of this.

As for the life span of the sun,.. In 5 billion years, the Sun will become a red giant, its outter surface will expand to about where Mars' orbit is now. Then, sometime later, the Sun will become a White Dwarf and eventually die out.

perhaps. but i'm talking about OUR solar system. what impact will that have on OUR solar system. i know stars die all the time but they are not OUR sun. so what happened to the sytems surrounding those extinct stars?

i already clarified back in post # 12 that when i said universe i meant solar system.

Jeanwah

From watching scientific shows, I figured that the sun would eventually collapse within itself like a black hole and swallow the planets in our solor system with it. Or it could die out, I guess. I'm wondering if a star dying out and collapsing is the same thing?

decides2dream

Jeanwah wrote:

From watching scientific shows, I figured that the sun would eventually collapse within itself like a black hole and swallow the planets in our solor system with it. Or it could die out, I guess. I'm wondering if a star dying out and collapsing is the same thing?

i'm no scientist...but i don't think so? if the sun dies, i ythink it simply releases the planet' from it's gravitational pull whereas if it becomes a black hole it's gravitational force gets stronger and thus would pull in and consume the planets, so definitely different scenarios. all interesting nonetheless...and most definitely, n the scheme of things...helps put into perspective my utter insignifacance in the whole scheme of things. in fact, i am unworthy of even a mention in the scheme of things. i take comfort in that, and it scares me some too....depending on my mood.

korby

what if the sun turned blue ?

catefrances

korby wrote:

what if the sun turned blue ?

that would be pretty. and hopefully it would be easier on the eyes than the white light is at the moment.

scw156

from what I remember learning in college:

if the sun were to just disappear (just poof, gone.) mysteriously, then the planets would just go flying off into space because there is no suns gravity holding them in orbit.

in reality, the sun will eventually expand to become a red giant and burn the shit out of the inner 4 planets or so then eventually become a while dwarf.

I'm pretty sure it wont ever become a supernova or possibly a black hole because our sun is a type G star and I don't believe they have enough mass to become supernova... (and then no blackhole after the BOOM)

also, here are some really good pictures I found on wikipedia when i searched "supernova"

http://upload.wikimedia.org/wikipedia/commons/d/d4/Keplers_supernova.jpg
http://upload.wikimedia.org/wikipedia/commons/0/00/Crab_Nebula.jpg
http://upload.wikimedia.org/wikipedia/commons/7/76/STScl-2005-15.png

ClimberInOz

Our sun is currently converting its supplies of hydrogen to helium. When the hydrogen supply within the core is extinguished the core begins to shrink as a result of the lack of reactions occurring. This shrinkage, however, generates heat that eventually causes the hydrogen in the outer layers of the star to convert to helium. This helium moves to the core, increasing the gravitational shrinkage of the core, which in turn increases the heat at the core up to 100 million K. This is sufficient to cause an entirely new set of reactions that convert helium to the next stable element, carbon. When the helium supply is extinguished within the core, it once again begins to shrink. The temperature begins to rise once again, but is insufficient to cause the next thermonuclear reaction, (carbon to oxygen). Instead the heat causes one final massive thermonuclear reaction in the outer layers and the surface is literally exploded off.

The outer layers that have been blown off form a ring like planetary nebula, while the core becomes a white dwarf. White dwarfs are small, (about the same size as the earth), although their mass is about 10 000 times heavier. One cubic centimeter of a white dwarf would weigh a tonne. The surface temperature is about 10 million K, although the core temperature is much cooler at about 1 million K. This temperature is insufficient to cause any fusion reactions to take place, so the star slowly radiates away its energy over billions of years eventually becoming merely a black cinder of degenerative matter, (crushed matter where the electrons have been forced closer to the atomic nuclei, and therefore greatly resist further compression).

harmless_little_f***

scw156 wrote:

from what I remember learning in college:

if the sun were to just disappear (just poof, gone.) mysteriously, then the planets would just go flying off into space because there is no suns gravity holding them in orbit.

in reality, the sun will eventually expand to become a red giant and burn the shit out of the inner 4 planets or so then eventually become a while dwarf.

I'm pretty sure it wont ever become a supernova or possibly a black hole because our sun is a type G star and I don't believe they have enough mass to become supernova... (and then no blackhole after the BOOM)

also, here are some really good pictures I found on wikipedia when i searched "supernova"

http://upload.wikimedia.org/wikipedia/commons/d/d4/Keplers_supernova.jpg
http://upload.wikimedia.org/wikipedia/commons/0/00/Crab_Nebula.jpg
http://upload.wikimedia.org/wikipedia/commons/7/76/STScl-2005-15.png

Those are great pictures, but my computer told me I had to set my monitor to no more than 2.9% brightness to view them, or I'd kill myself.

catefrances

i like this one.

http://upload.wikimedia.org/wikipedia/commons/d/d4/Keplers_supernova.jpg

macgyver06

catefrances wrote:

just had a thought whilst reading about this new movie, sunshine

if the sun dies, does that mean our universe will collapse in on itself?

the bigger question is..how long would we have to replace the bulb.... before we freeze

Brisk.

if the sun's size increases by 1% we will all die. Eventually the sun with grow so big that it engulfs the earth, so even by the time he gets close everything will have got scorched

gue_barium

I like magnets.

catefrances

gue_barium wrote:

I like magnets.

well who doesn't? they're fun to play with.

boxwine_in_hell

catefrances wrote:

just had a thought whilst reading about this new movie, sunshine

if the sun dies, does that mean our universe will collapse in on itself?

The Universe won't collapse, astronomically the sun is 1 tiny speck in the infinite space of the Universe. Our solar system will be fucked on the other hand.

boxwine_in_hell

hippiemom wrote:

I'm no scientist either, but I really like the pictures at the Hubble Telescope website, so I look there often, and I think that we've observed both the birth and death of stars, it happens all the time ... and our sun is a very small star, so my guess is that the implications for the universe wouldn't amount to much. Our solar system would obviously be done though, our planets would go hurtling through space without the sun's gravity to keep them in orbit.

Well not exactly. The first 4 or so planets closest to the sun will be engulfed and vaporized when the sun expands into it's Red Giant phase. It will then in theory become a White Dwarf and then possibly a Black Hole. White Dwarfs and Black Holes actually have greater gravitational pulls then the sun so technically the remaining planets in the solar system won't go hurtling through space, they will more likely crash into the Sun/White Dwarf/Black Hole.

Excuse me while I take another bong hit.

catefrances

boxwine_in_hell wrote:

The Universe won't collapse, astronomically the sun is 1 tiny speck in the infinite space of the Universe. Our solar system will be fucked on the other hand.

see post #12 for my clarification on solar system v universe.

ClimberInOz

boxwine_in_hell wrote:

Well not exactly. The first 4 or so planets closest to the sun will be engulfed and vaporized when the sun expands into it's Red Giant phase. It will then in theory become a White Dwarf and then possibly a Black Hole. White Dwarfs and Black Holes actually have greater gravitational pulls then the sun so technically the remaining planets in the solar system won't go hurtling through space, they will more likely crash into the Sun/White Dwarf/Black Hole.

Excuse me while I take another bong hit.

Our sun lacks the gravitational mass to turn into a black hole- it will end up as a white dwarf before radiating away all remaining energy.

Also, a black hole does not have a greater gravitational effect then the star it formed from. The matter is more concentrated, so the gravity close to the black hole is more extreme, but at a distance it doesn't change much. In binary star systems (stars that orbit around each other), where one star collapses into a black hole- the remaining star will maintain a very similar orbit.

blackredyellow

ClimberInOz wrote:

Our sun lacks the gravitational mass to turn into a black hole- it will end up as a white dwarf before radiating away all remaining energy.

Also, a black hole does not have a greater gravitational effect then the star it formed from. The matter is more concentrated, so the gravity close to the black hole is more extreme, but at a distance it doesn't change much. In binary star systems (stars that orbit around each other), where one star collapses into a black hole- the remaining star will maintain a very similar orbit.

But if the sun increases to the size where it would basically gobble up the first four planets, wouldn't it's gravitational pull become much much stronger and pull in the other planets?

I guess either way it's an after thought, we will be long gone.