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NASA's DART spacecraft hits target asteroid in test of planetary defense system

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This screengrab made from NASA live feed on Sept. 26, shows Dimorphos just before the Double Asteroid Redirection Test (DART) made impact with the asteroid, as watched by the NASA team (bottom L) at DART headquarters in Laurel, Maryland. AFP-Yonhap
This screengrab made from NASA live feed on Sept. 26, shows Dimorphos just before the Double Asteroid Redirection Test (DART) made impact with the asteroid, as watched by the NASA team (bottom L) at DART headquarters in Laurel, Maryland. AFP-Yonhap

Hurtling through the solar system at hypersonic speed on Monday, NASA's DART spacecraft slammed itself into a distant asteroid in a test of the world's first planetary defense system, designed to prevent a potential doomsday meteorite collision with Earth.

The finale to the suicide spaceflight, humanity's first attempt to alter the motion of an asteroid or any celestial body, played out in a NASA webcast from the mission operations center outside Washington, D.C., 10 months after DART was launched.

In this image made from a NASA livestream and taken from the Double Asteroid Redirection Test spacecraft, asteroid Dimorphos is seen as the spacecraft flies toward it, Sept. 26. AP-Yonhap
In this image made from a NASA livestream and taken from the Double Asteroid Redirection Test spacecraft, asteroid Dimorphos is seen as the spacecraft flies toward it, Sept. 26. AP-Yonhap

The livestream showed images taken by DART's own camera as the cube-shaped "impactor" vehicle, no bigger than a vending machine with two rectangular solar arrays, streaked into the asteroid Dimorphos, about the size of a football stadium, at around 7 p.m. EDT (2300 GMT) some 6.8 million miles (11 million km) from Earth.

The mission was devised to determine whether a spacecraft is capable of changing the trajectory of an asteroid through sheer kinetic force, nudging it off course just enough to keep our planet out of harm's way.



Whether it succeeded beyond accomplishing its intended impact will not be known until further ground-based telescope observations of the asteroid next month. But NASA officials hailed the immediate outcome of Monday's experiment, saying the spacecraft appeared to have performed as designed.

The Artemis I unmanned lunar rocket sits on launch pad 39B at NASA's Kennedy Space Center in Cape Canaveral, Florida, Sept. 25, just hours before it begins its rollback to the Vehicle Assembly Building (VAB). AFP-Yonhap
The Artemis I unmanned lunar rocket sits on launch pad 39B at NASA's Kennedy Space Center in Cape Canaveral, Florida, Sept. 25, just hours before it begins its rollback to the Vehicle Assembly Building (VAB). AFP-Yonhap

DART, launched by a SpaceX rocket in November 2021, made most of its voyage under the guidance of NASA's flight directors, with control handed over to an autonomous on-board navigation system in the final hours of the journey.

Monday evening's impact was monitored in near real time from the mission operations center at the Johns Hopkins University Applied Physics Laboratory (APL) in Laurel, Maryland.

Cheers could be heard from engineers in the control room as second-by-second images of the target asteroid grew larger and ultimately filled the TV screen of NASA's live webcast just before the spacecraft's signal was lost, confirming it had successfully crashed into Dimorphos. (Reuters)

NASA's Double Asteroid Redirection Test (DART) spacecraft prior to impact at the Didymos binary asteroid system showed in this undated illustration handout. Reuters-Yonhap
NASA's Double Asteroid Redirection Test (DART) spacecraft prior to impact at the Didymos binary asteroid system showed in this undated illustration handout. Reuters-Yonhap


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