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"How Scientists Predict if a Spacecraft will fall and..." Topic


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238 hits since 20 Oct 2017
©1994-2024 Bill Armintrout
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Tango0120 Oct 2017 11:55 a.m. PST

… and kill you.

"MAYBE YOU'VE HEARD that Tiangong-1, China's 19,000-pound prototype space station, is scheduled to rain down on Earth … eventually. As in, some time between now and next April. Most of the spacecraft will burn up in orbit—but sizable chunks (up to 220 pounds, by one estimate) could end up making landfall.
Thing is, nobody's sure where those chunks will land. Experts aren't exactly perturbed by this: The odds are slim (like, one-in-a-trillion slim) that some part of Tiangong-1 will come crashing down and do you bodily harm.

What you probably haven't heard is how experts go about determining those odds in the first place. In which case, please allow me to introduce you to the supremely fascinating world of object reentry risk analysis—the science of predicting which of the tens of thousands of derelict spacecraft, spent launch vehicles, and various other hunks of technology orbiting our planet will survive their inevitable plunge through the atmosphere and pose a threat to people here on Earth.

The first thing you need to understand is this: When a spacecraft plummets to Earth, it rarely makes the trip intact. The extreme heat and violent forces of atmospheric reentry obliterate most small objects (the industry term for this is, awesomely, "aero-thermal demise"). But the components of larger spacecraft can and do survive, depending on their thermal properties, how aerodynamic they are, and where they live inside the spacecraft…"
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Amicalement
Armand

Eclectic Wave20 Oct 2017 1:20 p.m. PST

"Aero-thermal demise" Oh I am so stealing that.

Tango0120 Oct 2017 8:58 p.m. PST

(smile)


Amicalement
Armand

Bunkermeister Supporting Member of TMP23 Oct 2017 10:25 p.m. PST

Time for a Dead Like Me reboot.

link

Mike Bunkermeister Creek
Bunker Talk blog

Mithmee24 Oct 2017 12:52 p.m. PST

Missed me by that much.

Charlie 1224 Oct 2017 7:26 p.m. PST

To be whacked by a falling piece of space junk has got to be the ultimate statement of plain, bad luck….

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