Astro Blog

By Kimberly M. S. Cartier , Eos/AGU.  Excerpt: Tiny asteroid Chariklo, floating through the void between Saturn and Uranus, boasts two rings. It’s the first asteroid found to have them, and their existence took astronomers by surprise when they were spotted in 2013. ...“The opacity of the outer ring is now lower than in the previous observations, but also the opacity of the inner ring was stronger,” said Pablo Santos-Sanz , an astrophysicist at Instituto de Astrofísica de Andalucía in Granada, Spain, and lead researcher on the discovery. ... Chariklo is a Centaur asteroid, meaning it orbits the Sun in the space between the giant planets. It’s 302 kilometers (108 miles) across, is not very spherical, and orbits about 2.3 billion kilometers (1.5 billion miles) from the Sun. In 2013, Chariklo passed between earthbound observers and a distant star, an alignment called stellar occultation. Astronomers saw that the star’s light dimmed twice before Chariklo obscured the star and twice a...

By Daniel Clery , Science.  Excerpt: NASA has selected a far-infrared space telescope to explore the faint, cool glow of gas and dust that fuel star formation and coalesce into planets. The $1.2 billion PRIMA is NASA’s first Probe class mission, intended to fill a gap between relatively inexpensive, researcher-led Explorer missions and multibillion-dollar flagship missions such as the JWST observatory. Due to launch in 2033, PRIMA would also end an observing gap for astronomers, who have lacked a space-based far-infrared instrument since Europe’s Herschel telescope ceased operation in 2013....  Full article at https://www.science.org/content/article/new-space-telescope-will-reopen-astronomers-view-far-infrared . 

By David Nield , ScienceAlert.  Excerpt: Now, a team from the Center for Astrophysics Harvard & Smithsonian and the University of Oregon has announced an important first: A radio signal coming directly from an exoplanet (a planet outside the Solar System). Previously, radio detections in planet-hosting systems couldn't be unambiguously localized to the planets rather than the stars they're circling. However, this isn't aliens trying to get in touch. It's the signal coming from the exoplanet's auroras, created by charged particles interacting with atmospheric and magnetic field conditions to release energy....  Full article at https://www.sciencealert.com/astronomers-detect-radio-signals-coming-directly-from-an-exoplanet-for-the-first-time .

By Mark S. Robinson et al, Science Advances.  Abstract: Observing the aftermath of recent impact events on the Moon tests models of impact frequency, surface change rates, and cratering physics. The Lunar Reconnaissance Orbiter Camera (LROC) Wide Angle Camera (WAC; 100-meter scale) images the whole Moon each month and has done so since 2010. ...In fall 2025, a routine temporal comparison of WAC image sets revealed a new 222-meter-diameter crater that formed in spring 2024. This is the largest contemporary impact crater found in the Solar System and, according to current models, a once-in-132-year event. ...images show that the crater exposed complex geology, inform current models of cratering mechanics, and document widespread surface changes extending more than 1000 crater radii....  Full article at https://www.science.org/doi/10.1126/sciadv.aeh7812 .