Discover and read the best of Twitter Threads about #Dimorphos
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This animation shows how the polarisation of sunlight reflected by the #Dimorphos asteroid changed after the impact of NASA’s #DART spacecraft. At the beginning of the video, unpolarised sunlight, represented by wiggly blue lines oscillating in random directions, ... 1/
... is reflected off the surface of the asteroid. In so doing it becomes polarised, the reflected waves now oscillating along a preferred direction. The indicator on the lower right shows the degree of polarisation of the reflected sunlight. 2/
The DART impact ejected a cloud of debris, and after the collision the amount of polarisation dropped, as seen with the FORS2 instrument on ESO’s Very Large Telescope. This drop in polarisation could be due to the exposure of more pristine material from the interior of ... 3/
#Futuro360 | Conversamos con Gaspar Galaz, astrónomo de la Universidad Católica de Chile (@ucatolica) y del Centro de Astrofísica y Tecnologías Afines #CATA, para conocer más sobre el impacto exitoso de la sonda #DART contra el asteroide #Dimorphos.
Comenta con #Futuro360
Comenta con #Futuro360
#Futuro360 | Gaspar Galaz, astrónomo U. Católica: “La importancia de esto consiste en que somos capaces, con los medios tecnológicos actuales de llevar una sonda a un objeto (...) y hacerlos colisionar a millones de kilómetros de distancia”
Conduce: Christian Noguchi
Conduce: Christian Noguchi
#Futuro360 | Gaspar Galaz, astrónomo U. Católica: "Todos los cálculos originales, considerando la masa del asteroide y de la sonda, la velocidad relativa de choque, muestran que efectivamente debiera haber un cambio en la órbita de dimorphos"
Futuro360.com
Futuro360.com
Warning: emotional #thread about #DARTMission.
It was 9 years ago when I started to work on @esa's Asteroid Impact Mission. This was the first time I met #Didymos. Since then, Didymos and its small moon #Dimorphos (back then it was Didymoon) became a huge part of my career.
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It was 9 years ago when I started to work on @esa's Asteroid Impact Mission. This was the first time I met #Didymos. Since then, Didymos and its small moon #Dimorphos (back then it was Didymoon) became a huge part of my career.
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Many things happened in my life during these 9 years. Didymos always followed me all around the globe.
I worked on engineering aspects of missions to Didymos (AIM and Hera/Milani), as well as on scientific ones, as a member of the DART&Hera Investigation Team.
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I worked on engineering aspects of missions to Didymos (AIM and Hera/Milani), as well as on scientific ones, as a member of the DART&Hera Investigation Team.
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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
