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#21 | |
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Thinks s/he gets paid by the post
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Posts: 1,572
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From Wiki: Future See also: Risks to civilization, humans and planet Earth The future of the planet is closely tied to that of the Sun. As a result of the steady accumulation of helium ash at the Sun's core, the star's total luminosity will slowly increase. The luminosity of the Sun will increase by 10 percent over the next 1.1 Gyr (1.1 billion years), and by 40% over the next 3.5 Gyr.[130] Climate models indicate that the rise in radiation reaching the Earth is likely to have dire consequences, including the possible loss of the planet's oceans.[131] The Earth's increasing surface temperature will accelerate the inorganic CO2 cycle, reducing its concentration to the lethal levels for plants (10 ppm for C4 photosynthesis) in 900 million years. The lack of vegetation will result in the loss of oxygen in the atmosphere, so animal life will become extinct within several million more years.[24] But even if the Sun were eternal and stable, the continued internal cooling of the Earth would have resulted in a loss of much of its atmosphere and oceans (due to lower volcanism).[132] After another billion years the surface water will have completely disappeared[133] and the mean global temperature will reach 70°C.[24] The Earth is expected to be effectively habitable for another 500 million years or so.[134] The Sun, as part of its evolution, will expand to a red giant in about 5 Gyr. Models predict that the Sun will expand out to about 250 times its present size, roughly 1 AU (150,000,000 km).[130][135] Earth's fate is less clear. As a red giant, the Sun will lose roughly 30% of its mass, so, without tidal effects, the Earth will be in an orbit 1.7 AU (250,000,000 km) from the Sun when the star reaches it maximum radius. Therefore, the planet is expected to escape envelopment by the expanded Sun's sparse outer atmosphere, though most, if not all, existing life will be destroyed because of the Sun's increased luminosity.[130] However, a more recent simulation indicates that Earth's orbit will decay due to tidal effects and drag, causing it to enter the red giant Sun's atmosphere and be destroyed.[135] shouldn't that be high on the next president's agenda?! ![]()
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If i think of something clever to say, i'll put it here... |
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#22 |
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Give me a museum and I'll fill it. (Picasso)
Give me a forum ... ![]() ![]() ![]() ![]() ![]() ![]() ![]() Join Date: Dec 2003
Location: Losing my whump
Posts: 22,527
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This appears to explain the whole thing:
We&squo;ve kept UFO proof secret to protect Hollywood | The Courier-Mail
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Many an optimist has become rich by buying out a pessimist |
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#23 |
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Moderator Emeritus
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Location: Texas Hill Country
Posts: 11,486
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In an effort to bring first hand information to the board regarding the possibility aliens walk among us, I traveled to Roswell, New Mexico, the claimed alien capital of the world. I've been here an hour and have seen one suspected alien but it turned out to only be a dog wearing a tinfoil hat and a sign that read: "I'll hump your leg if you buy an annuity".
Stay tuned for additional reports directly from the front lines. REW, Eyewitless News Fairly unbalanced |
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#24 | |
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Recycles dryer sheets
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Posts: 394
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Quote:
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There must be moderation in everything, including moderation. |
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#25 | |
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Thinks s/he gets paid by the post
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Location: Dallas Vicinity
Posts: 1,731
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Quote:
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Sometimes my feelings are so hot that I have to take the pen and put them out on paper to keep them from setting me afire inside; then all that ink and labor are wasted because I can't print the results....Mark Twain |
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#26 |
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Recycles dryer sheets
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Posts: 394
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Quickly, quickly, get AlGore, Helios is overheating, must be dang SUV's fault!
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There must be moderation in everything, including moderation. |
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#27 |
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Thinks s/he gets paid by the post
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Posts: 1,572
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yes, this isn't global warming, global broiling!
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