SpaceX launches a NASA spacecraft that will crash into an asteroid
November 25, 2021: -Elon Musk’s SpaceX is set to launch a first-of-its-kind planetary defense mission for NASA in the early hours of Wednesday, which sends the spacecraft on its way to crash into an asteroid intentionally.
“We are smashing into an asteroid,” NASA’s Launch Services Program senior launch director Omar Baez said in a press conference. “I can’t believe we’re doing that”
Known as the Double Asteroid Redirection Test mission, the space agency is trying to learn “how to deflect a threat that would come” toward Earth, NASA associate administrator of the science mission directorate Thomas Zurbuchen said.
SpaceX launches DART on a Falcon 9 rocket from Vandenberg Space Force Base in California, with a liftoff window that starts at 1:20 a.m. ET on Wednesday.
DART is a 610-kilogram spacecraft that will spend ten months traveling to a pair of asteroids named Didymos and Dimorphous. Johns Hopkins Applied Physics Laboratory in Maryland built DART, while space company Redwire contributed to the spacecraft’s navigation and solar arrays that will power it.
The mission’s goal is to hit the smaller of the two asteroids, Dimorphos, with the spacecraft at around 15,000 miles per hour and see how the impact changes the asteroid’s trajectory.
DART mission is costing NASA nearly $330 million in total, with SpaceX having won a $69 million contract in 2019 for the launch. Not is it NASA’s first planetary defense mission, but DART represents SpaceX’s first mission to launch a spacecraft to another planetary body.
“This is just the coolest mission. Thank you all for enabling SpaceX to be a part of a critical planetary defense mission,” SpaceX director of civil satellite missions Julianna Scheiman said during a press conference.
SpaceX test-fired its Falcon 9 rocket last Friday in preparation for the launch.
To give a sense of scale, the Dimorphos asteroid is about the size of the Great Pyramid of Giza. In contrast, the Didymos asteroid is more expansive in diameter than the One World Trade Center tower in New York City is tall. After arriving at the asteroids and smashing into Dimorphos, the DART spacecraft will deploy a small cube satellite to take photos of the impact event.
While the mission is to test a method of planetary defense, Zurbuchen emphasized that NASA is not aware of any near-term risks to Earth. There are billions of asteroids and comets orbiting the sun, but they have a chance of hitting the Earth for a very long time.
“Of all the near-Earth objects that we know today, none of them are a threat within 100 years or so,” Zurbuchen said.
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