A mystery interstellar object discovered last week is likely to be the oldest comet ever seen—possibly predating our solar system by more than 3 billion years, researchers say.
Astronomy
16 hours ago
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61
When the news started to spread on July 1, 2025, about a new object that was spotted from outside our solar system, only the third of its kind ever known, astronomers at Michigan State University—along with a team of international ...
Astronomy
10 hours ago
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7
Ever been late because you misread a clock? Sometimes, the "clocks" geologists use to date events can also be misread. Unraveling Earth's 4.5-billion-year history with rocks is tricky business.
Planetary Sciences
Jul 10, 2025
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19
On Earth, water is so intertwined with life that our search for life on other worlds is essentially a search for water. When scientists find exoplanets around distant stars, a primary consideration is if they're in the stars' ...
Astrobiology
Jul 10, 2025
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14
Our two-person team loaded the car with a GPS, a drone, notebooks, sample bags, a trowel and a flat spatula lovingly called a scoopula. Then we drove 30 minutes in our rented truck from Yuma, Arizona, to the Algodones Dunes, ...
Planetary Sciences
Jul 10, 2025
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1
Some exoplanets in their stars' habitable zones may be distinctly uninhabitable due to solar flaring. Red dwarfs are known for powerful flaring, and since they're dim and their habitable zones are close to the star, these ...
Planetary Sciences
Jul 10, 2025
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1
The discovery of more than 15,000 kilometers of ancient riverbeds on Mars suggests that the Red Planet may once have been much wetter than previously thought.
Planetary Sciences
Jul 9, 2025
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98
The answer to whether tiny bacterial life-forms really do exist in the clouds of Venus could be revealed once and for all by a UK-backed mission.
Astrobiology
Jul 9, 2025
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27
The moon's near and far sides exhibit striking asymmetry—from topography and crustal thickness to volcanic activity—yet the origins of these differences have long puzzled scientists.
Planetary Sciences
Jul 9, 2025
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14
A team of international researchers led by Tomas Stolker in the Netherlands has imaged a young gas giant exoplanet near a 12-million-year-old star. The planet is orbiting a star whose planet formation has finished, while ...
Planetary Sciences
Jul 9, 2025
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