Posted on 05/31/2012 11:08:54 AM PDT by Ernest_at_the_Beach
Preppers be damned!
LOL! Been there, done that, and not a bad thing. My town here in southern Alaska was founded in the gold rush of 1896. We still have two operating mines.
And as far as that swarm of locusts goes, we already have them, 2500 at a time courtesy of the cruise ship industry! Good thing for us they have money to spend.
Thanks for that,, sure has a nice shape to it and its deep.
Here’s hoping the preservationists don’t destroy it saving it. ;-)
So now we know a 30-foot rock can sneak up on us and not be seen until the last second. No surprise. But one question I’ve never seen answered is, how big is the largest rock (moving at, say, 30 mi/sec) which could sneak up on us and not be seen until it is too late? To avoid detection until the very last minute, a large rock would probably have to come in from the direction of the Sun and so be lost in the glare. Anyhoo... 300ft?... 3000ft?... One mile? The dinosaur in me is dying to know.
(Thanks for the ping!)
Thanks Ernest. An ‘extra extra’ ping to the APoD list.
In answer, any size (or dark material) that isn’t likely to be detected by optical telescopes; radioastronomy to detect near-Earth objects doesn’t (yet) cover the entire sky, which is a huge mistake IMHO.
The impactor that produced the 3/4 mile wide Meteor Crater was less than 80 feet in diameter.
The Tunguska object detonated before striking the ground (there’s been a recent renewal of interest in looking for metallic chunks embedded near ground zero) and knocked down many thousands of trees for miles in all directions, and was probably 100 feet in diameter (mostly ices).
Wow, interesting!
Too many "close ones" the last week of May.
There is speculation way out there that we periodically pass thru belts of stuff .. or mysterious bodies shoot off stuff in our direction..
What’s to keep a couple of them playing a little cosmic carom pool and whupping up some major crust and mantle .. It is 2012 ... hmmm
As they approached earth, they realized who was residing in the White House and decided it best to just pass by.
Astronomers Unravel A Mystery Of The Dark Ages
Undergraduates' work blames comet for 6th-century "nuclear winter" Scientists at Cardiff University, UK, believe they have discovered the cause of crop failures and summer frosts some 1,500 years ago a comet colliding with Earth. The team has been studying evidence from tree rings, which suggests that the Earth underwent a series of very cold summers around 536-540 AD, indicating an effect rather like a nuclear winter.
Thanks bhf.
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