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NEWS WORTHY

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NEWS WORTHY
Post by cthia   » Thu Jan 13, 2022 9:45 pm

cthia
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NASA's Parker Probe flies into the Sun's Corona. :o

I never thought I would ever hear something like that. Why doesn't the probe burn up? That is some thermal shield! NASA has come a long way baby, from the days of heat tiles that fall off.

Son, your mother says I have to hang you. Personally I don't think this is a capital offense. But if I don't hang you, she's gonna hang me and frankly, I'm not the one in trouble. —cthia's father. Incident in ? Axiom of Common Sense
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Re: NEWS WORTHY
Post by Louis R   » Fri Jan 14, 2022 9:43 pm

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You're overlooking the vast difference between temperature and heat: the corona may clock in at 1,000,000+K, but we still have a hard time creating vacuums that good on earth. So there isn't enough energy in the plasma Parker encounters to do it much harm before it can be radiated away.

The real issue Parker faces is intense sunlight - which will probably eventually damage the sun shield to the point where the spacecraft won't survive another trip. But the portion of the orbit spent that close to the Sun isn't very long, and things get to cool down again near aphelion, so that's some way off still.

cthia wrote:NASA's Parker Probe flies into the Sun's Corona. :o

I never thought I would ever hear something like that. Why doesn't the probe burn up? That is some thermal shield! NASA has come a long way baby, from the days of heat tiles that fall off.
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Re: NEWS WORTHY
Post by cthia   » Sat Jan 22, 2022 7:08 pm

cthia
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Joined: Thu Jan 23, 2014 1:10 pm

Louis R wrote:You're overlooking the vast difference between temperature and heat: the corona may clock in at 1,000,000+K, but we still have a hard time creating vacuums that good on earth. So there isn't enough energy in the plasma Parker encounters to do it much harm before it can be radiated away.

The real issue Parker faces is intense sunlight - which will probably eventually damage the sun shield to the point where the spacecraft won't survive another trip. But the portion of the orbit spent that close to the Sun isn't very long, and things get to cool down again near aphelion, so that's some way off still.

cthia wrote:NASA's Parker Probe flies into the Sun's Corona. :o

I never thought I would ever hear something like that. Why doesn't the probe burn up? That is some thermal shield! NASA has come a long way baby, from the days of heat tiles that fall off.

Indeed. It is being discussed in various places on the net. It is just that once upon a time I would never have guessed there would be a probe sent inside the Sun's Corona to actually investigate.

Probably not as bad as my early thinking in grade school that the core of the sun was solid.

Son, your mother says I have to hang you. Personally I don't think this is a capital offense. But if I don't hang you, she's gonna hang me and frankly, I'm not the one in trouble. —cthia's father. Incident in ? Axiom of Common Sense
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Re: NEWS WORTHY
Post by cthia   » Sat Jan 22, 2022 7:17 pm

cthia
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The Sky is Falling

The ISS Space Station controlled crash landing. I don't actually feel good about phrases like "We think" or "Little danger."

The damn thing is the size of a football field and weighs in at 431 tons. It used to be a joke that the sky is falling. Progress.

Son, your mother says I have to hang you. Personally I don't think this is a capital offense. But if I don't hang you, she's gonna hang me and frankly, I'm not the one in trouble. —cthia's father. Incident in ? Axiom of Common Sense
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