Science Forums

# Shrinking sun

## Recommended Posts

okay i searched around, couldn't find any threads about a shrinking sun.

just want you to see what i'm thinking and get some feed back.

first of all i don't think the sun is shrinking, but it should be.

if it is losing energy then it is losing mass.

mass=energy

this amount of water=this amount of electricity

this amount of gas=this amount of heat, or miles

the fusion and fision reaction doesn't compute.

how can more energy be released than is stored?

##### Share on other sites

The sun does loose mass.

Energy = Mass * C (speed of light).

So you can convert a little bit of mass and get a whole lot of energy:)

This is the same way a nuclear reactor gets so much energy out of a little bit of fissionable material (except it is fusion instead of fission).

##### Share on other sites

The Sun converts about 5,000,000 tons of matter to energy per second. Even at this prodigious rate, after a billion years it will have only converted about 1/16000 of its total mass to energy.

##### Share on other sites
• 5 weeks later...

:yeahthat:Yes, Comparing the converted energy to total mass, it would be highly unnoticable that it was shrinking a little bit every second, or even over a billion years as stated above.

And once a helium flash occurs, im sure youll wish it were shrinking :eek:

Assuming you will live for a few billion years.

~Giles is Sunbathing!

##### Share on other sites
okay i searched around, couldn't find any threads about a shrinking sun.

just want you to see what i'm thinking and get some feed back.

first of all i don't think the sun is shrinking, but it should be.

if it is losing energy then it is losing mass.

mass=energy

this amount of water=this amount of electricity

this amount of gas=this amount of heat, or miles

the fusion and fision reaction doesn't compute.

how can more energy be released than is stored?

Actually the Sun is expanding, it's mass may be getting less by a infinitesimal percentage but the sun is very slowly expanding. You don't understand what fission and fusion reactions are. They are not chemical reactions like fire nor are they physical energy like flowing water. Fission, and in the case of the sun fusion turn mass directly into energy. As the reaction uses up more hydrogen the reaction expands further into the sun and causes the sun to expand as more energy is released by an expanding sphere of nuclear fusion. The extra energy will cause the sun to expand. As the reaction continues to deposit helium ash in the center of the sun the heat and pressure rises and when conditions are right helium begins to fuse. At this point the sun will start to expand faster and faster exponentially, eventually causing the sun to expand beyond the orbit of Venus and maybe even engulfing the Earth in about five billion years. But before that it will slowly get hotter and in as little as a billion years the Earth will become uninhabitable to complex life and maybe even all life.

##### Share on other sites

The early astronomers marvelled at the sun,

They tought that the sun was supreme, it burnt on wood/fire wood.

If it happened such very little energy will be liberated and life form would find it difficult to survive on earth

Thus by years of astronomical research, house arrests, even executions

Astronomers thought of another fuel

Einstein came upon THE street wide famous equation, bringing balance to the force--Uhh forces acting in the sun, thereby giving proof (given above by my friends)

THat was mankind's view of the average yellow star shining o'er us

Average because it is a small star compared to others

TBA

## Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

×   Pasted as rich text.   Paste as plain text instead

Only 75 emoji are allowed.

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.