One of the things I like about The Onion, to which I pay cash money for the print version, is the "ads"
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@VoiceofDuum
Is it a true ad?
@sposadelvento @VoiceofDuum No. In about 5 billion years the sun's core supply of H will have been mostly converted to He via nuclear fusion that currently provides us with energy, & then the sun will expand to become a red giant with its surface just inside the Earth's orbit. At that point the core will engage in a He -> C fusion reaction. After a few hundred million years the core will be choked up with C and then it will collapse to become a white dwarf star. 1/3 #astronomicalTruths
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@sposadelvento @VoiceofDuum No. In about 5 billion years the sun's core supply of H will have been mostly converted to He via nuclear fusion that currently provides us with energy, & then the sun will expand to become a red giant with its surface just inside the Earth's orbit. At that point the core will engage in a He -> C fusion reaction. After a few hundred million years the core will be choked up with C and then it will collapse to become a white dwarf star. 1/3 #astronomicalTruths
@sposadelvento @VoiceofDuum The most important determinant of stellar evolution is stellar mass. Massive blue stars run through fusion reactions up to Fe & then explode in supernovae, & the whole process takes just a few million years. Fe is the energy well of the universe. Fusion of lighter elements yields energy, while fission of heavier ones yields energy. Tiny red dwarfs don't reach the He -> C stage, but take hundreds of billions of years to become white dwarfs. 2/3 #astronomicalTruths
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@sposadelvento @VoiceofDuum The most important determinant of stellar evolution is stellar mass. Massive blue stars run through fusion reactions up to Fe & then explode in supernovae, & the whole process takes just a few million years. Fe is the energy well of the universe. Fusion of lighter elements yields energy, while fission of heavier ones yields energy. Tiny red dwarfs don't reach the He -> C stage, but take hundreds of billions of years to become white dwarfs. 2/3 #astronomicalTruths
@sposadelvento @VoiceofDuum The key to these differences is that each successive fusion stage requires greater stellar core compression in order to overcome the natural repulsion between positively charged atomic nuclei of increasing mass & charge. Low mass stars can't generate the required core compressions for higher-level nuclear fusion reactions, & also lower compressions mean lower fusion reaction rates, hence the vastly longer lives of low mass stars. 3/3 #astronomicalTruths
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> Actually the move off the main sequence will start already in some 2 billion years.
To be clear, a slow brightening of the Sun as the core fuel stock is depleting has already been going on over geological time. The switch off the main sequence is just an acceleration of this.
@martinvermeer @VoiceofDuum I'm not sure whether to be thrilled that the sun won't just turn off like a light switch or sad that the world will slowly be leached of color as the sun fades away - or if I should even contemplate any of this, since I probably only have a decade left on this planet?
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@thepoliticalcat @VoiceofDuum Just saying, looks can deceive — I’m very well preserved.
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@martinvermeer @VoiceofDuum I'm not sure whether to be thrilled that the sun won't just turn off like a light switch or sad that the world will slowly be leached of color as the sun fades away - or if I should even contemplate any of this, since I probably only have a decade left on this planet?
@thepoliticalcat @VoiceofDuum Well, you found it already worth one boost and two replies, so you do seem to care. So do I, though I too live in human time, not deep time. Not everything is about me me me, right?
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@thepoliticalcat @VoiceofDuum Well, you found it already worth one boost and two replies, so you do seem to care. So do I, though I too live in human time, not deep time. Not everything is about me me me, right?
@martinvermeer @VoiceofDuum I do, very much. I care about all kinds of things, and people, and I often wish I cared a little less, because I can't help but feel what they must feel when bad things happen. Not everything is about me, and not even about all the mes that belong in MY circle, and I wish, hope, and work to find a way to join all of us in making things better for all of us.
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One of the things I like about The Onion, to which I pay cash money for the print version, is the "ads"
@VoiceofDuum
Reminds me of the parody ads in MAD Magazine I used to love. -
One of the things I like about The Onion, to which I pay cash money for the print version, is the "ads"
@VoiceofDuum @swoonie Had I kown this, I would have never bought into solar panels! But mainbeam media and big sun will not tell you about this. And of course the extended warranty won’t be covering shit in two billion years either. I‘m so pissed right now!!!
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One of the things I like about The Onion, to which I pay cash money for the print version, is the "ads"
@VoiceofDuum It's also my favorite gift to share.
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One of the things I like about The Onion, to which I pay cash money for the print version, is the "ads"
@VoiceofDuum in a trillion years the universe will undergo heat death. where will your precious concept of using energy exchange to perform useful work be then?
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One of the things I like about The Onion, to which I pay cash money for the print version, is the "ads"
@VoiceofDuum Brilliant.
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@sposadelvento @VoiceofDuum The key to these differences is that each successive fusion stage requires greater stellar core compression in order to overcome the natural repulsion between positively charged atomic nuclei of increasing mass & charge. Low mass stars can't generate the required core compressions for higher-level nuclear fusion reactions, & also lower compressions mean lower fusion reaction rates, hence the vastly longer lives of low mass stars. 3/3 #astronomicalTruths
@TreeStarMan @sposadelvento @VoiceofDuum 1,231 Internet points for completely missing the point of a humorous post.
