Will napísal:
Tak nejak zacinal aj Armageddon ze? Je to ale pre mna trochu zahada ze zrazu priletel takto asteroid. Ziadne hlasenie zo systemov sledujucich oblohu.
Sanca realne zachytit asteroid bliziaci sa k zemi v nejakom rozumnom predstihu je ovela mensia, ako si mysli vela ludi, my este zdaleka nemam take pokrytie, ako by sme chceli:
http://impact.arc.nasa.gov/intro_faq.cfm napísal:
How much warning will we have?
With so many of even the larger NEOs remaining undiscovered, the most likely warning today would be zero -- the first indication of a collision would be the flash of light and the shaking of the ground as it hit. In contrast, if the current surveys actually discover a NEO on a collision course, we would expect many decades of warning. Any NEO that is going to hit the Earth will swing near our planet many times before it hits, and it should be discovered by comprehensive sky searches like Spaceguard. In almost all cases, we will either have a long lead time or none at all.
(to je odpoved z roku 2004, odvtedy sa situacia urcite zlepsila, ale stale to nie je idealne)
K tomu sa mi velmi pacilo vyjadrenie astronoma, ktoreho sa Bill Bryson v jednej zo svojich knih raz pytal, v akom predstihu si mysli, ze by sme sa dozvedeli o katastrofickej udalosti s asteroidom. Jeho odpoved bola nieco okolo jednej sekundy, tesne pred tym, nez by sme sa vyparili.
Za poslednu dekadu to nebol prvy pripad velkej explozie, o ktorej dopredu nik nevedel:
http://en.wikipedia.org/wiki/Eastern_Me ... nean_eventhttp://en.wikipedia.org/wiki/Vitim_eventNa druhu stranu, zachytili sme napriklad toto:
http://en.wikipedia.org/wiki/2008_TC3