A new study challenges the dream of water-rich “Hycean” planets like K2-18b, suggesting that most sub-Neptunes lose their water deep into their interiors during formation. Instead of vast oceans, ...

Astronomers have discovered that many sub-Neptune exoplanets, once thought to host vast oceans, are far less watery than ...

Astronomers might be close to confirming the presence of an Earth-like atmosphere on an exoplanet for the first time, ...

Mars may have released sulfur gases that trapped heat, shaped the climate, and created conditions for ancient life.

Earth has a number of mini-moons and quasi-moons. Mini-moons are objects that orbit our planet. But they make for fickle fans: They tend to swing around Earth for only a matter of months. One example ...

A new NASA mission will capture images of Earth's invisible "halo," the faint light given off by our planet's outermost atmospheric layer, the exosphere, as it morphs and changes in response to the ...

Astronomers are all set to witness the razor-thin waning crescent moon rise close to Venus in the predawn sky today, while ...

In the quiet hours before sunrise, the sky becomes a canvas of cosmic artistry, where the moon and Venus share a fleeting, ...

From September 21st to November 23rd, 2025, the final phase of Guru Chandal Yoga will occur, potentially causing confusion ...

Hubble has captured a dense, burned-out star in the act of consuming a Pluto-like object. Happening some 260 light years from Earth, the new observation, published in the Monthly Notices of the Royal ...

Kevin France, a professor of astrophysics at the University of Colorado Boulder, discusses the Habitable Worlds Observatory, ...