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BREAKING: NASA's DART asteroid deflection mission has been declared as successful.

It has slowed the asteroid's orbit around its parent asteroid by 32 minutes: from 11 hr 55 min to 11 hr 23 min.
Pretty cool. A "hot off the press" image from the Hubble Space Telescope, showing the debris trail from the impact, which is still visible.
And here's some very clean data from ground-based telescopes showing that the small "eclipses" of Dimorphos around Didymos have shifted.
Read 5 tweets
Thar they are! Right now Dimorphos and Didymos are both this bright dot of light. They’ll separate into two dots in a little while. #DARTMission

I’ll add photos on to this thread periodically as approach continues.
At the moment, this is the only source for the approach images. If they have not appeared on a website by the time of the post-impact press briefing scheduled for (I think) 5pm Pacific time, I will ask! #DARTmission
So one hour prior to impact, or roughly 35 minutes after this tweet, the #DARTmission photos should start separating the two components of the Dimorphos system.
Read 42 tweets
Un asteroide sta per colpire la Terra e bisogna organizzare una missione spaziale di emergenza che eviti la catastrofe. È lo scenario di diversi film di fantascienza, di solito più attenti agli effetti speciali che al rigore scientifico. Ma è anche una preoccupazione reale? /1
Ogni settimana vengono scoperti circa 30 nuovi asteroidi con un’orbita vicina a quella terrestre. La probabilità che uno di questi metta a rischio la vita sulla Terra è bassissima nel breve termine, ma aumenta man mano che ci spostiamo nel futuro. /2
Nel 2018 il fisico Stephen #Hawking nel suo ultimo libro, Le mie risposte alle grandi domande, l'ha definito la minaccia più grave per la Terra. Un asteroide di un kilometro provocherebbe terremoti, tsunami e sconvolgimenti climatici e metterebbe a rischio la nostra civiltà. /3
Read 11 tweets

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