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Four huge asteroids — and a fifth that's much smaller — are passing Earth on Thursday in their closest approaches to the planet ever recorded. 4 large asteroids, including 1 the size of a ...
Outside the top four, the ranking of all the asteroids is uncertain, as there is a great deal of overlap among the estimates. The largest asteroids with an accurately measured mass, because they have been studied by the probe Dawn, are 1 Ceres with a mass of (939.3 ± 0.5) × 10 18 kg, and 4 Vesta at (259.076 ± 0.001) × 10 18 kg.
The list below shows all approaches by potentially hazardous objects (objects which can approach Earth within 0.05 astronomical units (AU)) without atmospheric contact which have been the closest ever observed at some point in time, from the discovery of the first such object to the record holder as of February 2025.
The media has nicknamed the asteroid the "Great Pumpkin" [10] after the animated Halloween television special It's the Great Pumpkin, Charlie Brown, [11] "Spooky", [12] the "Halloween Asteroid", [13] [14] and the "Skull Asteroid" [11] due to its skull-like appearance following radio frequency images taken at Arecibo Observatory and closest ...
In the moments before NASA's DART spacecraft slammed into the asteroid Dimorphos in a landmark planetary defense test in 2022, it took high-resolution images of this small celestial object and its ...
Boltonia asteroides, the white doll's daisy, [2] false chamomile, [3] or false aster, is a species of plant native to the United States and Canada. It is found primarily in the Mississippi Valley and Great Plains from Saskatchewan south to Texas and Florida , with isolated populations in the eastern United States .
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Related: Iconic photos from WWII: Fat Man was the second nuclear weapon to be deployed in combat after the US dropped a 5-ton atomic bomb, called " Little Boy ," on the Japanese city of Hiroshima.