When Dr. Henry Hsieh entered graduate school, he was interested in comets for a fairly simple reason: they seemed exciting.

On Monday, September 11, 2006, the first episode of Astronomy Cast was promoted across the Internet. Twenty years later, on ...

NASA’s Nancy Grace Roman Space Telescope, scheduled to launch August 30th, is designed to tackle some of the biggest ...

Pluto is on an icy march away from the Sun. In the year 2114, it will turn back, but until then, its elliptical orbit will carry it to colder and darker parts of the outer solar system. This is ...

This artist's illustration shows a white dwarf star surrounded by a debris disk with three asteroids orbiting in the disk. Credit: Pamela L. Gay / PSI Just as you may look to your grandparents to ...

Pamela L. Gay has been honored with the 2026 Westford Academy Alumni Distinguished Award for bringing the world of planetary science to the public. Westford Academy in Westford, Mass., is one of the ...

Long period comet C/2006 P1 (McNaught) over the Pacific ocean, as imaged from Paranal Observatory in 2007. Credit: ESO/Sebastian Deiries The Gaia mission has allowed researchers to understand the ...

The Perseverance rover on Mars inspects a rock dubbed Cheyava Falls with the Scanning Habitable Environments with Raman & Luminescence for Organics & Chemicals (SHERLOC) instrument on its robotic arm.

Candice Hansen-Koharcheck, a Planetary Science Institute senior scientist since 2010, died on April 11 after a valiant three-year battle with cancer. Her career spanned nearly 50 years, during which ...

Yellowballs, circled, are spherical star-forming regions that appear yellow in infrared images and are primarily associated with intermediate-mass stars. Credit: NASA/JPL-Caltech/The College of ...

As the Artemis II crew came close to passing behind the Moon and experiencing a planned loss of signal, they captured this image of a crescent Earth. Credit: NASA The participating scientists will ...

The painting on the left is an artist’s conception of a plume eruption on Saturn’s moon Enceladus. The image on the right is a photo of two researchers in the Utah desert collecting effluent from the ...