See Callisto Transit Jupiter and a Rogue Saturn Float Through the Milky Way

Read news from the world of astronomy for the week of January 9, 2026.

Having trouble viewing this email? {Click here to read it on the Web.} Read news from the world of astronomy for the week of January 9, 2026. Subscribe to Sky & Telescope Magazine to receive full access to the articles below. Visit our FAQ page to learn more. This week in the world of astronomy, discover a cloud of hydrogen gas that's devoid of stars and a rogue planet the size of Saturn. Plus, see Jupiter at opposition. An extremely rare Callisto event on January 10th Observers across America may witness a special transit and shadow event of Jupiter’s moon on opposition day. Read More Astro-News Highlights Not Every Galaxy Has a Central Black Hole Many less massive galaxies appear to lack something astronomers thought was ubiquitous: a central, supermassive black hole. Read More Rogue Saturn Discovered Floating Through the Milky Way Astronomers have measured the mass of a free-floating planet for the first time. Comparable to Saturn, it’s surprisingly massive for such rogue worlds. Read More Starless Gas Cloud Might Harbor Dark Matter Astronomers discovered a cloud of hydrogen gas that’s devoid of stars. Read More Visit Shop @ Sky for Atlases, Globes, and More! Observing Highlights This Week's Sky at a Glance, January 9 – 18 Jupiter is at opposition. Evenings are moonless, and the winter Milky Way arches high over the world. Betelgeuse stands over Sirius. Read More Big and Bright, Jupiter Beckons in January Jupiter’s having a special moment! Don’t miss the giant planet at its best when it reaches opposition this week. Read More January Podcast: Orion and Jupiter This time of year, you’ll always find the mighty Hunter rising up in the east at nightfall. He’s got real competition from Jupiter. Presented by: Celestron. Read More Community Comets & Interstellar Visitors: Exploring the Dynamic Sky On January 22, 2026, at 7:00 PM, ET, Hamptons Observatory will present a free, virtual lecture by Ariel Graykowski, a scientist from the SETI Institute, who will talk about comets, interstellar visitors such as 3I/ATLAS and its unique features. Read More The World's Largest Space and Astronomy Expo Returns! On April 11-12, over 100 of your favorite vendors, hundreds of fellow astronomy enthusiasts, and an incredible lineup of guest speakers will gather in Suffern, New York, for a cosmic extravaganza.  From a trusted S&T partner Read More Observing? But it's So Cold Outside! Stay warm with Sky & Telescope merch this January. Our high-quality, branded winter wear will help you keep out the cold while gazing up at the scintillating winter stars. Read More   Shop the S&T Swag Store Today! Sky & Telescope | American Astronomical Society | Privacy Policy

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