Dr Robin George Andrews 🌋☄️

NEW: Here it is—the inside story of how astronomers tracked down 2024 YR4, the most dangerous asteroid ever found, in the hope of working out whether it would strike Earth in a few short years. It’s Don’t Look Up, but everyone lives. Me @techreview technologyreview.com/2025/07/08/111…

NEW: Betelgeuse, a big red star, will eventually explode. But despite its self-destructive proclivities, the irritable giant has managed to make, and keep, a friend: a companion star that Betelgeuse will, eventually and rudely, eat up. Me @NYTScience nytimes.com/2025/07/21/sci…

Very cool update on 3I/ATLAS: the Vera Rubin Observatory (which hasn’t even got its survey going yet) has found images of the interstellar object going back to June 21, clearly showing a coma (that’s also expanding over time). Deffo a comet. (Not aliens.) arxiv.org/pdf/2507.13409

NEW: The warning has been downgraded to a TSUNAMI ADVISORY. It's likely that peak tsunami heights will be about 4 feet or less. Still – wave motions could cause damage at some marinas and docks.

A TSUNAMI ADVISORY IS NOW IN EFFECT...  SOUTH ALASKA AND THE ALASKA PENINSULA, Pacific coasts from    Kennedy Entrance, AK to Unimak    Pass, Alaska Mag  7.3  * Origin Time    1238 AKDT Jul 16 2025  * Depth 12 miles  * Location       55 miles S of Sand Point, Alaska

NEW: We’re all excited about 3I/ATLAS, the third-ever interstellar object to be discovered. But just you wait: Rubin’s probably going to find so many more—and in doing so, it’ll turn astronomers into archaeologists of long-lost worlds. Me @SuperclusterHQ supercluster.com/editorial/the-…

Ed. 81 features longreads from: @SquigglyVolcano @tawakarombo @KimberlyMutandi @evelazarus @m_hoppenstedt @vbauerlein @The_SummerMan @IanFrisch @lindsayzoladz @ErikaHayasaki @thisismaryjane_ @daphnecmilner @krevinlorenzo @sarahtreleaven @dmehro @lrnlrsn longformprofiles.substack.com/p/edition-81-l…

NEW: Come on, you didn’t think I’d write nothing on that new interstellar comet, even while on holiday, did you? Pfft. Here’s everything we know so far about the solar system’s new gatecrasher, from its size, shape, origins and voyage. ☄️ Me @NatGeo nationalgeographic.com/science/articl…

Well, isn’t that lovely?

Seismicity continues beneath Mt. Rainier, WA, at lower rates than yesterday. Plots show map of located swarm quakes (orange) with all quakes since 2020 (blue), and recent quake numbers/magnitudes over time. Update: ow.ly/2hnu50Wnb8H More info at ow.ly/NfyO50Wnb8F

An amateur astronomer may have just spotted the first known comet (or asteroid) impact on Saturn. We've seen impact flashes on the Moon & Jupiter, but this would be by far the most distant one yet observed. earthsky.org/space/did-spac…

An earthquake swarm began at Mt. Rainier, WA, at 1:29 am PDT on July 8. Map shows current swarm (orange) with all earthquakes located since 2020 (blue). According to @PNSN, hundreds of events have occurred thus far (max M1.7). This is the largest swarm at Mt. Rainier since 2009.

📣Discovery alert! One of NASA's planetary defense telescopes first observed an interstellar comet passing through our solar system. The comet is the third object we've found that has come from outside our solar system. It poses no threat to Earth. science.nasa.gov/blogs/planetar…

ESA's astronomers are actively tracking 3I/ATLAS, which is now the third confirmed interstellar comet to pass through our Solar System! More info at: esa.int/Space_Safety/P…

3rd interstellar object discovered? Maybe. There's a lot of buzz right now in the Astro community. More observations should come in tonight to confirm if A11pI3Z is from beyond the solar system.

Think you can spot a comet? ☄️ Try your eye with the *very first* citizen science project on @the_zooniverse that uses data from NSF-DOE Rubin Observatory, Comet Catchers! We can't think of a more fitting project for #AsteroidDay 🤩 ☄️ cometcatchers.net ☄️