&--Monday, January 29, 2007 ; 10:29 PM
EldwinSchrodinger @
EldwinSchrodinger @
loving you always ♥
When, in a distant future, the Sun begins to expand and evolves into a "giant" star, the surface temperature on the Earth will rise dramatically and our home planet will eventually be incinerated by that central body.
Fortunately for us, this dramatic event is several billion years away. However, that sad fate will befall another planet, just discovered in orbit about the giant star HD 47536, already within a few tens of millions of years. At a distance of nearly 400 light-years from us, it is the second-remotest planetary system discovered to datethat'll be several billion years to come before its our sun's turn. here's whats gonna happen after our sun become a red giant. thats where we have to evacuate earth to live in Neptune.
as you all know, our sun fuse hydrogen to helium. fusing them at a rate of 20 trillion tons per second. such stays could only last 10 million years. after the fusion and the depletion of hydrogen atoms in the core, thats it. the countdown to the explosion begins. this isn't Hiroshima atomic tragedy.
`one million years to blast off
the gravitational collapse in the core of the sun pushes temperatures to about 170 million degrees or more. thats where helium atoms fuse to form carbon and oxygen.
`one thousand years to go
once the helium in the inner shell of the core is used up, the core begins to contract again, fusing carbon to neon and magnesium.
`7 years left
the temperature reaches 1.5 billion degrees in the stella core. neon then fuses to form more oxygen and magnesium. thats where we have to evacuate Neptune. our last habitable planet in our solar system.
`1 year to go
temperatures in the collapsing core top 2 billion degrees! compressed oxygen atom fused to form silicon and sulfur.
`a few days to a month
at 3 billion degrees fusion in the core, silicon and sulfur fuse to form compressed ball of iron. this is the last of all reaction that can take place
`1/10 a second left
at 45000 miles per second, the iron core crushes on itself just like earth packing into a ball 10 miles across! they call it the "maximum scrunch"
`explosion begins
the explosive shock wave blast through the layers of the sun, creating heavy elements as it goes. spewing out neutrinos trapped in the core. and that, a supernova.
Labels: Stars And Suns
