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Astronomy Aug 2, 2024

Study of comet A117uUD data suggests it was put on a 'hyperbolic trajectory' during pass by Saturn

A pair of astrophysicists from Ciudad Universitaria and Universidad Complutense de Madrid, both in Spain, report evidence that comet A117uUD was put on its current "hyperbolic trajectory" when it passed close to Saturn two ...

Planetary Sciences Aug 1, 2024

A new study shows how the sun could permanently capture rogue planets

Interest in interstellar objects (ISOs) was ignited in 2017 when 'Oumuamua flew through our solar system and made a flyby of Earth. Roughly two years later, another ISO passed through our solar system—the interstellar comet ...

Analytical Chemistry Aug 1, 2024

Uniquely precise: New value for the half-life of samarium-146

Researchers at the Paul Scherrer Institute PSI and the Australian National University have re-determined the half-life of samarium-146 with great precision. The result fits perfectly with the data astrophysicists and geochemists ...

Evolution Jul 31, 2024

Mass extinction 66 million years ago triggered rapid evolution of bird genomes, study finds

Shortly after an asteroid slammed into Earth 66 million years ago, life for non-avian dinosaurs ended, but the evolutionary story for the early ancestors of birds began.

Astronomy Jul 31, 2024

NASA smacked a spacecraft into an asteroid—and learned details about its 12-million-year history

NASA's DART mission—Double Asteroid Redirection Test—was humanity's first real-world planetary defense mission.

Planetary Sciences Jul 31, 2024

Astrophysicists build model to explain to rapid planet formation

Our solar system is our immediate cosmic neighborhood. We know it well: the sun at the center; then the rocky planets Mercury, Venus, Earth, and Mars; and then the asteroid belt; followed by the gas giants Jupiter and Saturn; ...

Astronomy Jul 30, 2024

DART mission sheds new light on target binary asteroid system

In studying data collected from NASA's DART (Double Asteroid Redirection Test) mission, which in 2022 sent a spacecraft to intentionally collide with the asteroid moonlet Dimorphos, the mission's science team has discovered ...

Astrobiology Jul 30, 2024

Study suggests cloud-to-ground lightning strikes may have generated building blocks for life on Earth

A large team of chemists at Harvard University has found evidence suggesting that cloud-to-ground lightning strikes may have helped generate some of the building blocks needed for life on Earth to arise.

Astronomy Jul 29, 2024

Ever see a star explode? You're about to get a chance very soon

Every clear night for the last three weeks, Bob Stephens has pointed his home telescope at the same two stars in hopes of witnessing one of the most violent events in the universe—a nova explosion a hundred thousand times ...

Astronomy Jul 27, 2024

A cave discovered on the moon opens up new opportunities for settlement by humans

Almost 55 years after the launch of Apollo 11—the first mission to land humans on the moon—scientists have found evidence of a large cave system near the landing site of those astronauts.

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