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    Near-Earth Objects tagged posts

    The Origins of Dark Comets

    July 14, 2024, Categories  Astronomy/Space

    Up to 60% of near-Earth objects could be dark comets, mysterious asteroids that orbit the sun in our solar system that likely contain or previously contained ice and could have been one route for delivering water to Earth, according to a University of Michigan study.

    The findings suggest that asteroids in the asteroid belt, a region of the solar system roughly between Jupiter and Mars that contains much of the system’s rocky asteroids, have subsurface ice, something that has been suspected since the 1980s, according to Aster Taylor, a U-M graduate student in astronomy and lead author of the study.

    The study also shows a potential pathway for delivering ice into the near-Earth solar system, according to Taylor. How Earth got its water is a longstanding question.

    “We don’t know...

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    New Algorithm Ensnares its First ‘Potentially Hazardous’ Asteroid

    August 1, 2023, Categories  Astronomy/Space

    Image showing the orbit of 2022 SF289 (green) at its closest approach to Earth (orbit in blue). Orbits of Venus and Mars are shown in orange and red, respectively.Joachim Moeyens/University of Washington/OpenSpace

    An asteroid discovery algorithm – designed to uncover near-Earth asteroids for the Vera C. Rubin Observatory’s upcoming 10-year survey of the night sky – has identified its first “potentially hazardous” asteroid, a term for space rocks in Earth’s vicinity that scientists like to keep an eye on. The roughly 600-foot-long asteroid, designated 2022 SF289, was discovered during a test drive of the algorithm with the ATLAS survey in Hawaii...

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    How to Defend the Earth from Asteroids

    April 21, 2019, Categories  Astronomy/Space


    The NEOWISE space telescope spotted Comet C/2013 US10 Catalina speeding by Earth on August 28, 2015. This comet swung in from the Oort Cloud, the shell of cold, frozen material that surrounds the Sun in the most distant part of the solar system far beyond the orbit of Neptune. NEOWISE captured the comet as it fizzed with activity caused by the Sun’s heat. On November 15, 2015, the comet made its closest approach to the Sun, dipping inside the Earth’s orbit; it is possible that this is the first time this ancient comet has ever been this close to the Sun. NEOWISE observed the comet in two heat-sensitive infrared wavelengths, 3.4 and 4.6 microns, which are color-coded as cyan and red in this image...
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    More than 15,000 Near-Earth Objects, NEO and Counting

    October 30, 2016, Categories  Astronomy/Space

    more-than-15000-near-earth-objects-neo-and-counting-science-astronomy-medi_2016-10-30_09-06-14

    Final sequence of images of Asteroid Lutetia, acquired on 10 July 2010 by ESA’s Rosetta spacecraft just before making closest approach of 3162 km. Lutetia is an elongated body, with its longest side around 130 km. ~ESA 2010 MPS for OSIRIS Team MPS/UPD/LAM/IAA/RSSD/INTA/UPM/DASP/IDA

    The international effort to find, confirm and catalogue the multitude of asteroids that pose a threat to our planet has reached a milestone: 15 000 discovered – with many more to go.The number of catalogued asteroids approaching Earth has grown rapidly since the count reached 10 000 only 3 years ago. Near-Earth objects, or NEOs, are asteroids or comets with sizes ranging from metres to tens of kilometres whose orbits come close to ours, ie they could hit our planet.

    The discovered NEOs are part of a much lar...

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