Image shows: This view from NASA’s Scout system shows the deflection of asteroid 2023 BU’s trajectory – in red – caused by Earth’s gravity. The orbit of geosynchronous satellites is shown in green, and the orbit of the Moon is depicted by the gray oval. Asteroid 2023 BU is about the size of a box truck and is predicted to make one of the closest approaches by a near-Earth object ever recorded. The asteroid was discovered by amateur astronomer Gennadiy Borisov, discoverer of the interstellar comet 2I/Borisov, from his MARGO observatory in Nauchnyi, Crimea, on Saturday, Jan. 21. Additional observations were reported to the Minor Planet Center (MPC) – the internationally recognized clearinghouse for the position measurements of small celestial bodies – and the data was then automatically posted to the Near-Earth Object Confirmation Page. After sufficient observations were collected, the MPC announced the discovery. Within three days, a number of observatories around the world had made dozens of observations, helping astronomers better refine 2023 BU’s orbit. NASA’s Scout impact hazard assessment system, which is maintained by the Center for Near Earth Object Studies (CNEOS) at the agency’s Jet Propulsion Laboratory in Southern California, analyzed the data from the MPC’s confirmation page and quickly predicted the near miss. CNEOS calculates every known near-Earth asteroid orbit to provide assessments of potential impact hazards in support of NASA’s Planetary Defense Coordination Office (PDCO). While any asteroid in Earth’s proximity will experience a change in trajectory due to our planet’s gravity, 2023 BU will come so close that its path around the Sun is expected to be significantly altered. Before encountering Earth, the asteroid’s orbit around the Sun was roughly circular, approximating Earth’s orbit, taking 359 days to complete its orbit about the Sun. After its encounter, the asteroid’s orbit will be more elongated, moving it out to about halfway between Earth’s and Mars’ orbits at its farthest point from the Sun. The asteroid will then complete one orbit every 425 days. -PICTURED: Truck-Sized Asteroid -LOCATION: United States United States -DATE: 26 Jan 2023 -CREDIT: NASA/JPL-Caltech/Cover Images/INSTARimages.com,Image: 752024714, License: Rights-managed, Restrictions: , Model Release: no, Pictured: Truck-Sized Asteroid
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A television at NASA's Kennedy Space Center in Cape Canaveral, Florida, captures the final images from the Double Asteroid Redirection Test (DART) as it approaches asteroid Dimorphos (R), past asteroid Didymos (L), on September 26, 2022. - NASA's DART spaceship on September 26 struck the moonlet asteroid Dimorphos, in a historic test of humanity's ability to prevent a cosmic object devastating life on Earth. (Photo by Jim WATSON / AFP)
Život
Video. NASA namjerno zabila letjelicu u asteroid. Ovdje možete pogledati snimku tog povijesnog trenutka
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Politika & Kriminal

Možda će zvučati čudno, ali izgleda da bi NASA mogla raznijeti asteroide kao Bruce Willis u hitu Armageddon

Nuklearnim oružjem mogli bi se raznijeti asteroidi srednje veličine

FOTO: thegreatlandoni/Flickr
24. 06. 2015. 24 preporuka

Američka svemirska agencija Nasa priprema se za stvarni Armagedon. Zajedno s Nacionalnom nuklearnom sigurnosnom administracijom Nasa krenula je s pripremama za obranu od asteroida. Za tu će svrhu pripremati svemirsku letjelicu koja će moći lansirati nuklearne projektile u asteroide koji prijete Zemlji, piše Daily Mail.

Nuklearno oružje može raznijeti asteroide i komete prosječne veličine između 50 i 150 metara. No, stručnjaci kažu da bi fragmenti asteroida mogli situaciju učiniti još i gorom i tvrde kako je skretanje putanje asteroida bolje rješenje.

Hollywood je možda sve dobro shvatio, piše Daily Mail. Sve bi to izgledalo baš kao u filmu Armageddon, u kojem Bruce Willis leti u svemirskom brodu kako bi nuklearnim projektilima uništio asteroid.

Milijun asteroida prijeti Zemlji

Kompjuterska ilustracija asteroida iznad Zemlje
Kompjuterska ilustracija asteroida iznad Zemlje Science Photo Library

Znanstvenici vjeruju kako postoji približno milijun asteroida oko Zemlje koji bi mogli predstavljati prijetnju našoj planeti, a samo ih je mali broj do sada otkriven. Dramatičan dokaz da bi ti asteroidi zaista i mogli udariti zemlju došao je 15. veljače prošle godine, kada je nepoznati objekt eksplodirao visoko iznad Chelyabinska u Rusiji, oslobađajući 20 do 30 puta više energije od atomske bombe u Hirošimi.

Sustav nazvan Hypervelocity asteroid sastoji se od letjelica koje lete duboku u svemir i presreću asteroide. Takva bi letjelica trebala pogoditi komet ili asteroid i stvoriti eksploziju. Otprilike milisekundu kasnije, druga letjelica koja bi išla za tom s nuklearnim bi eksplozivom pogodila unutar tog kratera što bi povećala učinkovitost cijele operacije i do 20 puta.

SAD, NASA, asteroidi, Armageddon,