{"id":8258,"date":"2024-11-01T07:34:06","date_gmt":"2024-11-01T07:34:06","guid":{"rendered":"https:\/\/amnewsworld.com\/?p=8258"},"modified":"2024-11-01T07:34:06","modified_gmt":"2024-11-01T07:34:06","slug":"a-spacecraft-is-on-its-way-to-a-harmless-asteroid-slammed-by-nasa-in-a-previous-save-the-earth-test","status":"publish","type":"post","link":"https:\/\/www.amnewsworld.com\/fi\/a-spacecraft-is-on-its-way-to-a-harmless-asteroid-slammed-by-nasa-in-a-previous-save-the-earth-test\/","title":{"rendered":"A spacecraft is on its way to a harmless asteroid slammed by NASA in a previous save-the-Earth test"},"content":{"rendered":"

A spacecraft blasted off Monday to investigate the\u00a0scene of a cosmic crash<\/span>.<\/p>\n

The European Space Agency\u2019s Hera spacecraft rocketed away on a two-year journey to the small, harmless asteroid rammed by\u00a0NASA two years ago<\/a><\/span>\u00a0in a dress rehearsal for the day a killer space rock threatens Earth. It\u2019s the second part of a planetary defense test that could one day help save the planet.<\/p>\n

 <\/p>\n

SpaceX\u2019s Falcon rocket quickly disappeared with Hera into the late morning clouds. An hour later, applause erupted in the control center in Germany as the spacecraft separated from the rocket\u2019s upper stage and then called home. \u201cIt\u2019s an amazing day,\u201d the space agency\u2019s director general Josef Aschbacher said afterward.<\/p>\n

The 2022 crash by\u00a0NASA\u2019s Dart spacecraft<\/span>\u00a0shortened Dimorphos\u2019 orbit around its bigger companion, demonstrating that if a dangerous rock was headed our way, there\u2019s a chance it could be knocked off course with enough advance notice.<\/p>\n

 <\/p>\n

Scientists are eager to examine the impact\u2019s aftermath up close to know exactly how effective Dart was and what changes might be needed to safeguard Earth in the future.<\/p>\n

 <\/p>\n

\u201cThe more detail we can glean the better as it may be important for planning a future deflection mission should one be needed,\u201d University of Maryland astronomer Derek Richardson said before launch.<\/p>\n

Researchers want to know whether Dart short for Double Asteroid Redirection Test left a crater or perhaps reshaped the 500-foot (150-meter) asteroid more dramatically. It looked something like a flying saucer before Dart\u2019s blow and may now resemble a kidney bean, said Richardson, who took part in the Dart mission and is helping with Hera.<\/p>\n

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Dart\u2019s wallop sent rubble and even boulders flying off Dimorphos, providing an extra kick to the impact\u2019s momentum. The debris trail extended thousands of miles (more than 10,000 kilometers) into space for months.<\/p>\n

Some boulders and other debris could still be hanging around the asteroid, posing a potential threat to Hera, said flight director Ignacio Tanco.<\/p>\n

 <\/p>\n

\u201cWe don\u2019t really know very well the environment in which we are going to operate,\u201d said Tanco. \u201cBut that\u2019s the whole point of the mission is to go there and find out.\u201d<\/p>\n

European officials describe the $400 million (363 million euro) mission as a \u201ccrash scene investigation.\u201d<\/p>\n

Hera \u201cis going back to the crime site and getting all the scientific and technical information,\u201d said project manager Ian Carnelli.<\/p>\n

 <\/p>\n

Carrying a dozen science instruments, the small car-sized Hera will need to swing past Mars in 2025 for a gravity boost, before arriving at Dimorphos by the end of 2026. It\u2019s a moonlet of Didymos, Greek for twin, a fast-spinning asteroid that\u2019s five times bigger. At that time, the asteroids will be 120 million miles (195 million kilometers) from Earth.<\/p>\n

 <\/p>\n

Hera will attempt to go into orbit around the rocky pair, with the flyby distances gradually dropping from 18 miles (30 kilometers) all the way down to a half-mile (1 kilometer). The spacecraft will survey the moonlet for at least six months to ascertain its mass, shape and composition, as well as its orbit around Didymos.<\/p>\n

Before the impact, Dimorphos circled its larger companion from three-quarters of a mile (1,189 meters) out. Scientists believe the orbit is now tighter and oval-shaped, and that the moonlet may even be tumbling.<\/p>\n

 <\/p>\n

Two shoebox-sized Cubesats will pop off Hera for even closer drone-like inspections, with one of them using radar to peer beneath the moonlet\u2019s boulder-strewn surface. Scientists suspect Dimorphos was formed from material shed from Didymos. The radar observations should help confirm whether Didymos is indeed the little moon\u2019s parent.<\/p>\n

 <\/p>\n

The Cubesats will attempt to land on the moonlet once their survey is complete. If the moonlet is tumbling, that will complicate the endeavor. Hera may also end its mission with a precarious touchdown, but on the larger Didymos.<\/p>\n

Neither asteroid poses any threat to Earth before or after Dart showed up. That\u2019s why NASA picked the pair for humanity\u2019s first asteroid-deflecting demo.<\/p>\n

 <\/p>\n

Leftovers from the solar system\u2019s formation 4.6 billion years ago, asteroids primarily orbit the sun between Mars and Jupiter in what\u2019s known as the main asteroid belt, where millions of them reside. They become near-Earth objects when they\u2019re knocked out of the belt and into our neck of the woods.<\/p>\n

NASA\u2019s near-Earth object count currently tops 36,000, almost all asteroids but also some comets. More than 2,400 of them are considered potentially hazardous to Earth.<\/p>\n

 <\/p>\n

AMN | Reporters | Cape Naval supported by AP.<\/strong><\/p>","protected":false},"excerpt":{"rendered":"

A spacecraft blasted off Monday to investigate the\u00a0scene of a cosmic crash. The European Space Agency\u2019s Hera spacecraft rocketed away on a two-year journey to the small, harmless asteroid rammed by\u00a0NASA two years ago\u00a0in a dress rehearsal for the day a killer space rock threatens Earth. 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