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General Physics Jan 23, 2024

Gravity helps show strong force strength in the proton

The power of gravity is writ large across our visible universe. It can be seen in the lock step of moons as they circle planets; in wandering comets pulled off-course by massive stars; and in the swirl of gigantic galaxies. ...

Space Exploration Jan 19, 2024

Q&A: Small solar sails could be the next 'giant leap' for interplanetary space exploration

Nearly 70 years after the launch of the first satellite, we still have more questions than answers about space. But a team of Berkeley researchers is on a mission to change this with a proposal to build a fleet of low-cost, ...

Planetary Sciences Jan 16, 2024

Samples from Wild 2 comet reveal a surprising past

Eighteen years after NASA's Stardust mission returned to Earth with the first samples from a known comet, the true nature of that icy object is coming into focus.

Astronomy Jan 9, 2024

Centaurs gain comet-like characteristics through close encounters with Jupiter, Saturn

A rapid reshaping of orbits resulting from a close encounter with Jupiter or Saturn can lead Centaurs to exhibit comet-like activity, according to a Planetary Science Institute Senior Scientist Eva Lilly paper.

Astronomy Dec 14, 2023

NASA's NEOWISE celebrates 10 years, plans end of mission

The asteroid and comet-hunting infrared space telescope has gathered an impressive haul of observations, but it's now at the mercy of the sun, which is accelerating its demise.

Planetary Sciences Dec 12, 2023

Halley's comet is finally headed back to the sun: When you can see it

The most famous comet of all is headed back toward Earth. Halley's comet reached aphelion—its farthest point from the sun—on Dec. 8, at which point it began its long journey back to the sun.

Astronomy Dec 7, 2023

Famed Halley's comet passes aphelion this weekend

It's lonely out there in the frozen outer solar system. On Saturday, December 9th, that most famous of all comets 1P/Halley reaches a hallmark point on its 75-year journey through the solar system, reaching aphelion or its ...

Astrobiology Nov 14, 2023

'Bouncing' comets could deliver building blocks for life to exoplanets

How did the molecular building blocks for life end up on Earth? One long-standing theory is that they could have been delivered by comets. Now, researchers from the University of Cambridge have shown how comets could deposit ...

Planetary Sciences Nov 14, 2023

Testing of citizen scientist discovery suggests it is on the boundary between comet and asteroid

A team of space scientists, astronomers and astrophysicists affiliated with multiple institutions across the U.S., working with a colleague from Italy, has determined that a celestial object spotted by citizen scientists ...

Astronomy Nov 7, 2023

A new trail to exoplanets: Team successfully detects ammonia isotopologues in atmosphere of cold brown dwarf

They reveal the origin of wine, the age of bones and fossils, and they serve as diagnostic tools in medicine. Isotopes and isotopologues—molecules that differ only in the composition of their isotopes—also play an increasingly ...

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