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/sci/ - Science & Math

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1134999 No.1134999 [Reply] [Original]

I'm not a physicist so I don't know. Can you explain this?

>> No.1135015

There are no suns made of lava or ice, and there never will be.

>> No.1135026

It makes the freezeflame galaxy in mario galaxy

obv

>> No.1135027

>>1134999
saying a sun of ice is like saying a icecube of flame, its just plain stupid. your talking about a blue giant

>> No.1135028

This is what nuclear fusion is, so if we can achieve this, we would have an great supply of energy to use

>> No.1135055

So just replace the word "sun" in "sun made of ice" with "sun-sized sphere". The lava sun, assuming no fusion was happening to provide a constant energy output, would cool before completely vaporizing the ice, though I think it would claim a good 2/3 before becoming cold rock itself. Space itself is quite cold, let us not forget.

>> No.1135060

>>1135055

>space is cold

Nope, just high-entropy.

>> No.1135076

>>1135060
According to the zeroth law definition of temperature, it is quite cold--close to absolute zero, as all science on the subject agrees. Very few particles=very little particle motion=very low temperature.

>> No.1135094

a sun sized ice sphere would initiate fusion on it's core and evaporate pretty quickly.

>> No.1135097

>sun made of ice
Now, assuming it's just a block of ice large enough to count as a sun and not as a planet, it would just collapse. I mean, do you have any idea about what amount of mass we are talking here?

>> No.1135100

>>1135055
Is a sun-sized sphere of ice stable against gravitational collapse?

>> No.1135110

>>1135076

Space isn't a refrigerator. It doesn't cool things off. Things cool off because they radiate all their heat into space. Much like how ice doesn't cool a drink. The drink warms the ice.

Entropy takes place. From heat to no heat. The way it was phrased was misleading.

>> No.1135111

>>1135097
It's a ball made of ice. It collapses a bit and undergoes fusion. That's why it's a sun!

>> No.1135116

>>1135111
Thus, it rapidly melts from inside. Wow, you have two regular suns crashing into each other.

>> No.1135128

>>1135110
Much like how refrigerators don't cool beer, beer warms refrigerators?

>> No.1135129

So a new question then: Which would last longer after achieving fusion? My guess: Ice sun. Greater supply of lighter elements to fuse.

>> No.1135145

>>1135128
Yes. The beer warms the refrigerator, the refrigerator warms the liquid, the liquid goes to the outside, becomes compressed and warms the outside.

>> No.1135179

The sun isn't made of lava, it's almost entirely (99%) plasma.

>> No.1135185

>>1135179
This is a discussion based solely on hypotheticals. Thought experiments.