Hubble confirms largest comet nucleus ever seen

NASA’s Hubble Space Telescope has determined the size of the largest icy comet nucleus ever seen by astronomers. The estimated diameter is approximately 80 miles across, making it larger than the state of Rhode Island. The nucleus is about 50 times larger than found at the heart of most known comets.

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Characteristics of Apophis, the asteroid that will approach Earth in 2029

The study, in which the Universidad Carlos III de Madrid (UC3M) and the Universidad Estatal Paulista Julio de Mesquita Filho (Julio de Mesquita Filho Paulista State University) (UNESP) of Brazil are participating, analyses the surface and dynamics of Apophis, an asteroid that will pass close to Earth in 2029.

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Ryugu could be a remnant of an extinct comet

Asteroids hold many clues about the formation and evolution of planets and their satellites. Understanding their history can, therefore, reveal much about our solar system. While observations made from a distance using electromagnetic waves and telescopes are useful, analyzing samples retrieved from asteroids can yield much more detail about their characteristics and how they may have formed.

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Fifth asteroid ever discovered before impact

At 19:24 UTC on 11 March 2022, astronomer Krisztian Sarneczky discovered a bright and fast-moving new object in the sky using the 60cm Schmidt telescope at the Piszkesteto observatory, Hungary. He collected four observations in quick succession, and just 14 minutes later reported his findings to the Minor Planet Center (MPC),

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NASA System Predicts Impact of Small Asteroid

Asteroid 2022 EB5 was too small to pose a hazard to Earth, but its discovery marks the fifth time that any asteroid has been observed before impacting into the atmosphere.

A small asteroid hit Earth’s atmosphere over the Norwegian Sea before disintegrating on March 11,

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The state of planetary defense in the 2020s

The Earth exists in a dangerous environment. Cosmic bodies, like asteroids and comets, are constantly zooming through space and often crash into our planet. Most of these are too small to pose a threat, but some can be cause for concern.

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Youngest pair of asteroids in solar system detected

An international team of astronomers has discovered a pair of asteroids that split off from their parent body a mere 300 years ago. The duo is exceptional because it is the youngest known “asteroid pair” by at least a factor of ten,

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Astronomers create new global force to stop Elon Musk’s internet satellites hiding killer asteroids

Megaconstellations are corrupting astronomers’ view of space and could impact planetary defences against incoming space debris

A union of astronomers is taking action to protect the study of the night sky from the effects of the thousands of satellites launched by companies such as SpaceX.

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Did comet’s fiery destruction lead to downfall of ancient Hopewell?

The rapid decline of the Hopewell culture about 1,500 years ago might be explained by falling debris from a near-Earth comet that created a devastating explosion over North America, laying waste to forests and Native American villages alike.

Researchers with the University of Cincinnati found evidence of a cosmic airburst at 11 Hopewell archaeological sites in three states stretching across the Ohio River Valley.

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NASA asteroid tracking system now capable of full sky search

The NASA-funded Asteroid Terrestrial-impact Last Alert System (ATLAS)-a state-of-the-art asteroid detection system operated by the University of Hawaii (UH) Institute for Astronomy (IfA) for the agency’s Planetary Defense Coordination Office (PDCO)-has reached a new milestone by becoming the first survey capable of searching the entire dark sky every 24 hours for near-Earth objects (NEOs) that could pose a future impact hazard to Earth.

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