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transportation:comets [2026/06/04 00:32] – [Arizona] timbtransportation:comets [2026/07/28 21:27] (current) – [Meteorite] timb
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 +
 +
 +===== 1998 SH2 =====
 +
 +== Scientists Believed This Near-Earth Object Was an Asteroid for 28 Years. They Were Wrong ==
 +
 +The asteroid 1998 SH2 is actually not an asteroid at all.
 +
 +Passant Rabie - July 21, 2026, 7:30 am ET
 +
 +On August 28, 2025, astronomers aimed NASA’s radar system at a region of space where a near-Earth asteroid was expected to appear. Instead, the object failed to show up, leaving researchers puzzled. The unexpected no-show turned what seemed like a routine observation into a surprising case of mistaken identity.
 +
 +In a study published in Nature Astronomy, a team of scientists reveals the true identity of a near-Earth object with an apparent dual personality. Scientists had been tracking the object for 28 years, assuming it might be an asteroid. Its recent deviation from its predicted path, however, suggested something unexpected is influencing the object’s motion.
 +
 +Although previous observations of asteroid 1998 SH2 didn’t show obvious comet-like behavior, a more precise measurement of its position in the sky proved that its motion is irregular like that of a comet.
 +
 +https://gizmodo.com/scientists-thought-this-near-earth-object-was-an-asteroid-for-28-years-they-were-wrong-2000787726
  
  
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 https://futurism.com/asteroid-nasa-dart-unexpected https://futurism.com/asteroid-nasa-dart-unexpected
  
 +== Scientists Say We Should Nuke Dangerous Asteroids—Just Not the Way You Think ==
  
 +It's sort of like Armageddon, but with less oil drills.
 +
 +Passant Rabie - July 9, 2026, 10:55 am ET
 +
 +Scientists in China say a nuclear explosion could be the most effective way to stop a large asteroid—and they may have identified the best strategy for making it work.
 +
 +A recent study published in Space: Science & Technology proposes a new approach for planetary defense. In response to the threat of an asteroid impact, the researchers, led by Wang Xiaowei from the China Academy of Launch Vehicle Technology, suggest carving a crater into the asteroid and placing a nuclear warhead inside it before detonation.
 +
 +This approach could destroy or deflect asteroids roughly 330 feet (100 meters) wide, which would otherwise wreak havoc on our planet.
 +
 +https://gizmodo.com/scientists-say-we-should-nuke-dangerous-asteroids-just-not-the-way-you-think-2000783487
  
  
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 https://gizmodo.com/dust-dinosaur-extinction-climate-simulations-chicxulub-1850985083 https://gizmodo.com/dust-dinosaur-extinction-climate-simulations-chicxulub-1850985083
  
 +== The Asteroid That Killed the Dinosaurs May Not Have Done It Exactly How We Thought ==
 +
 +Researchers identified the Chicxulub impactor as an exceptionally rare type of asteroid that wouldn't have triggered a mass extinction in the way scientists previously thought.
 +
 +Ellyn Lapointe - July 20, 2026, 11:45 am ET
 +
 +Roughly 66 million years ago, a giant asteroid slammed into what is known today as Mexico’s Yucatán Peninsula, triggering the extinction of all non-bird dinosaurs and many other species. Scientists know this thanks to a wealth of geological evidence, but a new study has them rethinking how the impact contributed to that mass extinction.
 +
 +The findings, published Friday in the journal Science Advances, suggest that the asteroid was an exceptionally rare visitor from the edge of our solar system. After analyzing samples from a thin layer of clay that the impact deposited across the globe, the researchers concluded that the impactor was a CO chondrite. This type of space rock has relatively low concentrations of volatile elements such as water, carbon, zinc, and particularly sulfur, which throws the widely accepted extinction mechanism into question.
 +
 +“It doesn’t alter our theory of what caused the extinction event—but it makes it less likely that sulphur contained in the impactor was the smoking gun,” co-author Philippe Claeys, a planetary scientist and professor at the Free University of Brussels in Belgium, said in a statement. “The fine debris thrown into the atmosphere would have [been] the primary factor.” Claeys contributed to this research as a visiting professor at the University of British Columbia.
 +
 +https://gizmodo.com/the-asteroid-that-killed-the-dinosaurs-may-not-have-done-it-exactly-how-we-thought-2000787712
  
  
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 https://www.chemistryworld.com/news/meteorite-200-times-larger-than-one-that-killed-dinosaurs-reset-early-life/4020391.article https://www.chemistryworld.com/news/meteorite-200-times-larger-than-one-that-killed-dinosaurs-reset-early-life/4020391.article
 +
 +== Amateur Astronomer Discovers Ancient Meteorite Impact Using Google Maps ==
 +
 +Scientists confirmed that the crater dates back around 390 million years ago.
 +
 +Passant Rabie - July 28, 2026, 9:25 am ET
 +
 +Joël Lapointe was casually browsing Google Maps, planning hiking routes for an upcoming camping trip, when he stumbled upon an unusual indentation near Marsal Lake in Quebec. As an amateur astronomer, Lapointe recognized that the large pit may be the site of a meteorite impact that left a scar on the terrain. Scientists just confirmed that he was right.
 +
 +Researchers announced the existence of a large crater in the Côte-Nord region of Quebec, which dates back to around 390 million years ago, the Canadian Broadcasting Corporation (CBC) reported. Following Lapointe’s initial discovery in 2024, a team of geologists set out to examine the impact site and were able to verify that a meteorite did in fact smash into Earth at this particular point.
 +
 +The team’s research will be presented at the annual congress of the Meteoritical Society, which will be held on August 9 to 14 in Frankfurt, Germany.
 +
 +https://gizmodo.com/amateur-astronomer-discovers-ancient-meteorite-impact-using-google-maps-2000791283
 +
  
  
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 ===== 2026 ===== ===== 2026 =====
 +
 +==== Arizona ====
 +
 +== Arizona's Meteor Crater is still revealing new secrets 50,000 years later ==
 +
 +"The crater is still providing new insights every year, so continued studies there are really important."
 +
 +Leonard David - 13 March 2026
 +
 +Arizona's Meteor Crater and other scars leftover from collisions with space rocks continue to serve up their secrets.
 +
 +Meteor Crater formed some 50,000 years ago. It represents the best preserved meteor impact site in the world, measuring some 700 feet deep (213 meters), more than 4,000 feet across (1,219 meters), and 2.4 miles (3.9 kilometers) in circumference.
 +
 +Impact features like Meteor Crater continue to be ongoing research sites, generating new data on what happens when objects from the cosmos strike our planet. In fact, a number of competitive grants are being offered to support field research at known or suspected impact sites worldwide. That funding is backing laboratory and computer analysis of research samples and findings, creating new data from digging in on old craters around our globe.
 +
 +https://www.space.com/stargazing/meteor-showers/arizonas-meteor-crater-is-still-revealing-new-secrets-50-000-years-later
 +
  
 ==== Massachusetts ==== ==== Massachusetts ====
transportation/comets.1780533167.txt.gz · Last modified: by timb