Latest news with #LarryDenneau
Voice of America
22-02-2025
- Science
- Voice of America
Space Agencies Report Increased Risk of Space Rock Striking Earth in 2032
Scientists say the threat of a large space rock striking the Earth in 2032 has increased. Recent calculations suggest there is a small chance - perhaps around 1 to 3 percent - the space rock 2024 YR4 will hit Earth in 2032. This also means there is around a 97 to 99 percent chance it will safely pass our planet in that year. The odds of a strike will likely continue to go up and down as the asteroid's path around the sun is better understood. And scientists say there is a good chance the risk will drop to zero. NASA and the European Space Agency's Webb Space Telescope will observe this near-Earth asteroid in March before the object becomes impossible to see. Once that happens, scientists will have to wait until 2028 when it passes our way again. What is an asteroid? Asteroids are space rocks orbiting the sun. Asteroids are much smaller than planets. Scientists believe they are the leftovers from the solar system's formation 4.6 billion years ago. There are millions of asteroids orbiting the sun between Mars and Jupiter. That area is known as the main asteroid belt. The asteroids sometimes get pushed out of the belt and can end up elsewhere. How do scientists follow worrisome asteroids? A telescope in Chile discovered the asteroid 2024 YR4 in late December. It is estimated to measure between 40 and 90 meters across. NASA said observations by the Webb space telescope should provide a more exact measurement. At first, NASA and the European Space Agency put the odds of a strike at just over one percent. But later calculations suggested the odds had risen to 2 or even 3 percent. NASA described the likelihood of a strike as 'extremely low.' Until scientists have a better understanding of the asteroid's path around the sun, they warned that the odds will continue to change — and quite possibly fall to zero. 'You don't have to be worried about anything. It's a curiosity,' said Larry Denneau. He is a software engineer at the University of Hawaii working with ATLAS, a program to identify asteroids that might endanger Earth. That effort first spotted the asteroid. Denneau said, 'Don't panic. Let the process play out, and we'll have a for-sure answer.' In 2021, NASA said another possibly worrisome asteroid, Apophis, did not present a risk to Earth. NASA made the announcement after additional telescope observations ruled out any chance of it hitting Earth in 2068. Should we worry about asteroid 2024 YR4? Experts say it is too soon to worry about 2024 YR4. Paul Chodas is director of NASA's Center for Near-Earth Object Studies. Chodas said in an email to the Associated Press, 'No one should be concerned that the impact probability is rising. This is the behavior our team expected.' Chodas added, 'To be clear, we expect the impact probability to drop to zero at some point.' Since the asteroid's size and orbit are uncertain, it is unclear where it might hit and what the possible effects would be should it strike Earth. ESA said, if the asteroid is smaller, the effect might be similar to the Tunguska event that flattened thousands of square kilometers of forest in Siberia in 1908. But if the asteroid is larger, close to 100 meters, the effects 'would be significantly worse.' Chodas said once the Webb telescope measures the asteroid's size, NASA can predict 'how serious an impact this asteroid could produce and how difficult a task it might be to deflect this asteroid.' NASA already has some experience moving an asteroid. The space agency's Dart spacecraft hit a harmless asteroid in 2022. This was the first planetary defense test of its kind, changing the asteroid's orbit around its larger companion asteroid. I'm John Russell. Marcia Dunn reported this story for the Associated Press. John Russell adapted it for VOA Learning English. ______________________________________________________ Words in This Story odds –n. (pl.) the likelihood that something will happen curiosity –n. a strong desire to learn more about something panic – v. to be overcome with a powerful fear probability—n. the chance that an event will occur impact –n. an event in which one object strikes or crashes into another significantly – adv. in a major way deflect –v. to cause an object to move in another direction possibly by striking it and changing its path a little companion—n. an object that is closely connected to another, usually by gravity
Yahoo
14-02-2025
- Science
- Yahoo
Why asteroid 2024 YR4 is unlikely to hit Earth in 2032 and how scientists keep track
CAPE CANAVERAL, Fla. (AP) — The threat of a newly discovered asteroid has risen slightly in the past few weeks, as the world's telescopes rush to track its course. But the chance of an impact is still quite slim. New calculations suggest there's a 2% chance the space rock 2024 YR4 will smack Earth in 2032. This also means there's a 98% chance it will safely pass our planet. The odds of a strike will almost certainly continue to go up and down as the asteroid's path around the sun is better understood, and astronomers said there's a good chance the risk likely will drop to zero. NASA and the European Space Agency's Webb Space Telescope will observe this near-Earth asteroid in March before the object disappears from view. Once that happens, scientists will have to wait until 2028 when it passes our way again. What's an asteroid? Asteroids are space rocks orbiting the sun that are considerably smaller than planets. Scientists believe they're the leftovers from the solar system's formation 4.6 billion years ago. There are so many asteroids orbiting between Mars and Jupiter — millions of them — that this region is known as the main asteroid belt. They sometimes get pushed out of the belt and can end up all over the place — like this one. How do scientists track potentially dangerous asteroids? A telescope in Chile discovered the asteroid 2024 YR4 in December. It's estimated to be 130 feet to 300 feet (40 meters to 90 meters) across. Observations by the Webb telescope should provide a more precise measurement, according to NASA. NASA and the European Space Agency initially put the odds of a strike at just over 1%. By Thursday, it had risen to roughly 2%. NASA describes that as still 'extremely low.' Until scientists have a better understanding of the asteroid's path around the sun, they caution the odds will continue to fluctuate — and quite possibly fall to zero. 'You don't have to be worried about anything. It's a curiosity,' said Larry Denneau, senior software engineer with the University of Hawaii's asteroid impact alert system that first spotted the asteroid. 'Don't panic. Let the process play out, and we'll have a for-sure answer.' In 2021, NASA gave the all-clear to another potentially worrisome asteroid, Apophis, after new telescope observations ruled out any chance of it hitting Earth in 2068. Should we worry about asteroid 2024 YR4? It's way too soon to fret over this asteroid, according to the experts. 'No one should be concerned that the impact probability is rising. This is the behavior our team expected,' Paul Chodas, director of NASA's Center for Near-Earth Object Studies, said in an email. "To be clear, we expect the impact probability to drop to zero at some point.' Since the asteroid's size and orbit are uncertain, it's unclear where it might hit and what the possible impacts would be should it strike Earth. If the asteroid is on the smaller end, ESA said any potential impacts would be local similar to the Tunguska event that flattened thousands of square miles of forest in remote Siberia in 1908. But if it's close to 330 feet (100 meters), "the consequences would be significantly worse." Chodas said once Webb pinpoints the asteroid's size, NASA can predict 'how serious an impact this asteroid could produce and how difficult a task it might be to deflect this asteroid.' NASA already has some experience nudging an asteroid. The space agency's Dart spacecraft deliberately rammed a harmless asteroid in 2022 in the first planetary defense test of its kind, altering its orbit around its larger companion asteroid. ___ AP video journalist Mary Conlon contributed to this report. ___ The Associated Press Health and Science Department receives support from the Howard Hughes Medical Institute's Science and Educational Media Group and the Robert Wood Johnson Foundation. The AP is solely responsible for all content. Marcia Dunn, The Associated Press
Yahoo
13-02-2025
- Science
- Yahoo
Why asteroid 2024 YR4 is unlikely to hit Earth in 2032 and how scientists keep track
CAPE CANAVERAL, Fla. (AP) — The threat of a newly discovered asteroid has risen slightly in the past few weeks, as the world's telescopes rush to track its course. But the chance of an impact is still quite slim. New calculations suggest there's a 2% chance the space rock 2024 YR4 will smack Earth in 2032. This also means there's a 98% chance it will safely pass our planet. The odds of a strike will almost certainly continue to go up and down as the asteroid's path around the sun is better understood, and astronomers said there's a good chance the risk likely will drop to zero. NASA and the European Space Agency's Webb Space Telescope will observe this near-Earth asteroid in March before the object disappears from view. Once that happens, scientists will have to wait until 2028 when it passes our way again. See for yourself — The Yodel is the go-to source for daily news, entertainment and feel-good stories. By signing up, you agree to our Terms and Privacy Policy. What's an asteroid? Asteroids are space rocks orbiting the sun that are considerably smaller than planets. Scientists believe they're the leftovers from the solar system's formation 4.6 billion years ago. There are so many asteroids orbiting between Mars and Jupiter — millions of them — that this region is known as the main asteroid belt. They sometimes get pushed out of the belt and can end up all over the place — like this one. How do scientists track potentially dangerous asteroids? A telescope in Chile discovered the asteroid 2024 YR4 in December. It's estimated to be 130 feet to 300 feet (40 meters to 90 meters) across. Observations by the Webb telescope should provide a more precise measurement, according to NASA. NASA and the European Space Agency initially put the odds of a strike at just over 1%. By Thursday, it had risen to roughly 2%. NASA describes that as still 'extremely low.' Until scientists have a better understanding of the asteroid's path around the sun, they caution the odds will continue to fluctuate — and quite possibly fall to zero. 'You don't have to be worried about anything. It's a curiosity,' said Larry Denneau, senior software engineer with the University of Hawaii's asteroid impact alert system that first spotted the asteroid. 'Don't panic. Let the process play out, and we'll have a for-sure answer.' In 2021, NASA gave the all-clear to another potentially worrisome asteroid, Apophis, after new telescope observations ruled out any chance of it hitting Earth in 2068. Should we worry about asteroid 2024 YR4? It's way too soon to fret over this asteroid, according to the experts. 'No one should be concerned that the impact probability is rising. This is the behavior our team expected,' Paul Chodas, director of NASA's Center for Near-Earth Object Studies, said in an email. "To be clear, we expect the impact probability to drop to zero at some point.' Since the asteroid's size and orbit are uncertain, it's unclear where it might hit and what the possible impacts would be should it strike Earth. If the asteroid is on the smaller end, ESA said any potential impacts would be local similar to the Tunguska event that flattened thousands of square miles of forest in remote Siberia in 1908. But if it's close to 330 feet (100 meters), "the consequences would be significantly worse." Chodas said once Webb pinpoints the asteroid's size, NASA can predict 'how serious an impact this asteroid could produce and how difficult a task it might be to deflect this asteroid.' NASA already has some experience nudging an asteroid. The space agency's Dart spacecraft deliberately rammed a harmless asteroid in 2022 in the first planetary defense test of its kind, altering its orbit around its larger companion asteroid. ___ AP video journalist Mary Conlon contributed to this report. ___ The Associated Press Health and Science Department receives support from the Howard Hughes Medical Institute's Science and Educational Media Group and the Robert Wood Johnson Foundation. The AP is solely responsible for all content.
