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Space Litter To Hit Earth Tomorrow
A refrigerator-sized tank of toxic ammonia, tossed from the international space station last year, is expected to hit earth tomorrow afternoon or evening. The 1,400-pound object was deliberately jettisoned — by hand — from the ISS's robot arm in July 2007. Since the time of re-entry is uncertain, so is the location. "NASA expects up to 15 pieces of the tank to survive the searing hot temperatures of re-entry, ranging in size from about 1.4 ounces (40 grams) to nearly 40 pounds (17.5 kilograms). ... [T]he largest pieces could slam into the Earth's surface at about 100 mph (161 kph). ...'If anybody found a piece of anything on the ground Monday morning, I would hope they wouldn't get too close to it,' [a NASA spokesman] said."
I've yet to meet any non-Scandinavian that likes it, though apparently they sell they stuff in the Netherlands and Germany too.
about how cool this is?
First, here is NASA being about as open about it as they can get. We dumped a toxic container out, and it might hit your house or spouse or both. Possible reason for joy?
Second, 50 years ago there was probably only two people on the entire planet that could have thought such a safety announcement would be put out with all the fame and glory of a news item about a fender bender in the WalMart parking lot!
I kind of look forward to news reports like this:
Space weather warning: Launch News- Today in the Southern Americas regions, the likelihood of debris showers is at Threat Level Orange. Expected drop zone is 15 miles off the coast of Peru as the StarLiner "Moses" launches for Alpha Centauri.
Between the hours of 13:00 GMT and 23:50 GMT, some pieces of the launch platform are expected to survive the searing heat of re-entry. It is possible for pieces up to 57 kilograms to reach the Earth's surface. Please contact the local constabulary for concerns about livestock. Normal insurance claim processes apply.
You all wanted flying cars. I want star cruisers and Earth 2.0.
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...'If anybody found a piece of anything on the ground Monday morning, I would hope they wouldn't get too close to it,' [a NASA spokesman] said."
Hmm...and why might that be? Some stray ammonia molecules might still be clinging to said pieces? I read somewhere (probably here) that meteorites are actually cool to the touch if they arrive on the ground intact. I don't recall pieces of Columbia starting fires upon impact.
So if temperature isn't the issue, why would a NASA spokesman make such an inane statement?
There's something important that the summary ignored. (surprise, surprise) If you RTFA, you'll learn that the tank is filled with "toxic ammonia coolant." That means that the contents are very good at absorbing heat; else they'd be no good as a coolant. And, we all know that reentry generates lots and lots of heat. I wonder if anybody at NASA knows how much pressure that tank can hold and how likely it is to burst long before it reaches the ground.
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It's rare but being hit by metorites *does* happen. I can't find a recorded instance since 2002 (although there's a nice picture of a destroyed car from 1992 which probably doesn't count as it didn't hit a person.
Of course by the time it hits someone it's normally little more than a very hot pebble, and causes little more than some burning.
If something the size of a fridge hit you you'd feel a little bit more than a burning sensation!
Given the distribution of objects and people near or on any road, compared with the probability that the asteroid hits any where near a population of meaningful size to even have a tiny chance of hitting a person, I'd say you have a better chance of hitting some one with your car than some one being hit by this chunk falling from space.
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Have a look at Professer John Adams' analysis of people's understanding, assessment amd reaction to various sources of risk... He's spent a lifetime studying the whole field of "risk", and his idea of risk amplification seems to be gaining traction within the field:
http://www.socialaffairsunit.org.uk/blog/archives/000512.php
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