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Planetary Sciences 18 hours ago

Supersonic waves could explain the strange orbits of hot Jupiters and Neptunes

Using advanced new simulations, a team of astronomers in the U.S. has developed a promising new theory for how giant, gaseous exoplanets migrate into stiflingly close orbits around their host stars. Led by J. J. Zanazzi at ...

Planetary Sciences Oct 27, 2026

Rubin Observatory reveals its first dwarf planet candidate in our solar system

Scientists may add a new dwarf planet to the official roster of our solar system. The distant, icy body, provisionally dubbed 2026 ED138, orbits our system beyond Pluto. It was spotted earlier this month by a scientist combing ...

Astronomy Oct 27, 2026

Webb links interstellar comet 3I/ATLAS to worlds beyond Neptune through similar ice signatures

A Southwest Research Institute–led study used NASA's James Webb Space Telescope to examine ice grains streaming from interstellar comet 3I/ATLAS, just the third object from beyond our solar system ever identified. The observations ...

Planetary Sciences Oct 20, 2026

Water as we've never known it: Physicists test water beyond Earth-like conditions

Water isn't always as it seems. Under extreme conditions, such as those found on other planets, it has been discovered to change its atomic structure, giving it the means to alter its appearance and other properties.

Planetary Sciences Oct 19, 2026

Planetary 'twins' Uranus and Neptune may have different origin stories

By indirectly probing the depths of Uranus and Neptune's atmospheres, an international team of scientists has revealed a significant contrast in their chemical composition. Neptune appears to be more enriched in oxygen than ...

Planetary Sciences Oct 12, 2026

The dying sun could tear the solar system apart sooner than thought

The fate of our solar system is written in the stars—well, one star to be precise: the sun. Estimates of what the end will look like once the sun sheds much of its mass and ultimately dies vary widely. New research published ...

Astronomy Oct 6, 2026

Striking new images of unique supernova remnant reveal pearl-like chains

The only known supernova remnant of its kind in the Milky Way has an unexpectedly intricate structure: chains of gas knots resembling pearls on a string, each wide enough to fit the solar system multiple times. Using the ...

Astrobiology Sep 29, 2026

Alien life? Why the possibility of exoplanet LHS 1140b emitting helium gas is so exciting

This summer, exoplanet science—the study of planets orbiting stars beyond our sun—took a big step forward. Reports of helium gas escaping from the atmosphere of LHS 1140b propelled this exoplanet from the pages of scientific ...

Planetary Sciences Sep 24, 2026

Astronomers capture an unprecedented view of gas giant formation in action

In recent decades, astronomers have reconstructed a fairly complete scenario for planet formation, from minute dust motes clumping together to the emergence of rocky spheres thousands of kilometers across, like Earth, or ...

Planetary Sciences Sep 21, 2026

A 'rebellious' exoplanet orbits in the opposite direction of its star

A star and its planets form when a cloud of gas and dust collapses in on itself somewhere in space. The cloud then forms a disk around the nascent star, within which the planets will form. This protostar and its disk then ...

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