NASA Releases Space Telescope Pics of Asteroid Deflection Test
© Photo : Cristina Thomas (Northern Arizona University), Ian Wong (NASA-GSFC), Joseph DePasquale (STScI) / Dimorphos, the asteroid moonlet in the double-asteroid system of Didymos, about 4 hours after NASA’s Double Asteroid Redirection Test (DART) made impact
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US space agency NASA hailed the milestone of both its orbital telescopes viewing the same event simultaneously, and said the observations would help scientists understand how an asteroid headed for Earth could be deflected.
NASA has released pictures of its experimental mission to collide a spacecraft with an asteroid.
The images show the flare after the Double Asteroid Redirection Test (DART) craft collided at high speed with the asteroid Dimorphos, which orbits the larger rock Didymos on September 26.
The event was captured by the Hubble Space Telescope and its successor, the James Webb Space Telescope.
It was the first time that both the Hubble and Webb telescopes had observed the same target object simultaneously.
"For the first time, Webb and Hubble have simultaneously captured imagery from the same target in the cosmos: an asteroid that was impacted by a spacecraft after a seven-million-mile journey," said NASA Administrator Bill Nelson.
Observations of the Didymos-Dimorphos system several hours after NASA’s Double Asteroid Redirection Test (DART) intentionally impacted the moonlet asteroid
© Photo : NASA/Jian-Yang Li (PSI), Cristina Thomas (Northern Arizona University), Ian Wong (NASA-GSFC), / Observations of the Didymos-Dimorphos system several hours after NASA’s Double Asteroid Redirection Test (DART) intentionally impacted the moonlet asteroid
The US space agency said the impact would allow scientists to gain knowledge about the nature of the surface of Dimorphos, how much material was ejected by the collision, and how fast it was ejected.
The Hubble telescope viewed the impact in the visible light spectrum, while the Webb satellite recorded it in infra-red, which NASA said would allow the size of particles, potentially ranging from fine dust to large chunks, in the resulting dust cloud to be measured.
That will help astronomers understand how such kinetic impacts can change an asteroid's orbit.
28 September 2022, 04:17 GMT
The DART mission was designed to test the feasibility of deflecting a large asteroid or comet on a collision course with Earth — the subject of numerous Science Fiction films.
"All of humanity eagerly awaits the discoveries to come from Webb, Hubble, and our ground-based telescopes – about the DART mission and beyond," Nelson said.
