Please support this podcast by checking out our sponsors: - KrispCall: Agentic Cloud Telephony - https://try.krispcall.com/tad - Discover the Future of AI Audio with ElevenLabs - https://try.elevenlabs.io/tad - Invest Like the Pros with StockMVP - https://www.stock-mvp.com/?via=ron Support The Automated Daily directly: Buy me a coffee: https://buymeacoffee.com/theautomateddaily Today's topics: Roman telescope hunts invisible neutron stars - A new study shows NASA's Nancy Grace Roman Space Telescope could uncover a vast hidden population of isolated neutron stars using gravitational microlensing, offering the first large-scale census of these dark stellar remnants and precise mass measurements. Keywords: Roman Space Telescope, neutron stars, microlensing, stellar remnants, Milky Way. Hubble spots galaxy mid-transformation - Fresh Hubble observations of the galaxy NGC 1266 reveal a rare post-starburst system where a central black hole appears to be shutting down star formation, catching a galaxy in the act of transforming from blue and star-forming to red and quiescent. Keywords: Hubble Space Telescope, NGC 1266, galaxy evolution, black hole feedback, post-starburst. SpaceX Dragon CRS-34 docks with ISS - SpaceX's uncrewed Dragon cargo ship on the CRS-34 mission has arrived at the International Space Station with about 6,500 pounds of supplies and experiments, reinforcing the station's role as an orbiting laboratory for biology, materials science, and space weather research. Keywords: SpaceX Dragon, CRS-34, International Space Station, cargo resupply, microgravity experiments. Episode Transcript Roman telescope hunts invisible neutron stars Our first story stays in our own Milky Way, but focuses on some of the most elusive objects it contains. Neutron stars are the ultra-dense corpses left behind when massive stars explode, but most of them are practically invisible: they don’t beam radio waves toward us like pulsars, and they don’t actively feed on a companion star, so there’s almost no light to give them away. A new study out this weekend looks ahead to NASA’s Nancy Grace Roman Space Telescope and concludes that Roman could change that picture by detecting dozens of these otherwise hidden neutron stars through their gravity alone. The key idea is gravitational microlensing, where a massive compact object drifts in front of a background star and briefly bends and magnifies its light. Astronomers already use photometric microlensing, essentially watching for a temporary brightening of a star, to discover planets, black holes, and other dark objects. What Roman brings to the table is a combination of extremely precise brightness measurements and extremely precise position measurements for millions of stars toward the crowded center of the Milky Way. The simulations behind this new work suggest that, as a heavy lens passes in front of a background star, Roman will not only see the star brighten but also watch its apparent position shift ever so slightly on the sky. Because neutron stars are much more massive than things like rogue planets or brown dwarfs, they produce a larger positional wobble, and that allows their mass to be measured rather than just inferred. This matters for a couple of reasons. First, astronomers know from theory and from supernova rates that the galaxy should be littered with hundreds of millions of neutron stars, but only a small fraction have been detected as pulsars or X-ray sources. If Roman can systematically pick up the gravitational fingerprints of isolated neutron stars, it would give us the first real census of these dark remnants and let us ask whether our models of how massive stars live and die are actually right. Second, the masses that Roman measures will test where the boundary lies between the heaviest possible neutron star and the lightest possible black hole. Right now that "mass gap" is surprisingly murky; seeing whether nature fills it in, or leaves it empty, tells us something fundamental about the physics of matter under extreme pressure and about how different kinds of stellar explosions proceed. The same microlensing techniques Roman will use for neutron stars will also apply to other invisible populations, from free-floating planets to dead stellar cores wandering far from where they were born. So this is one of those stories where the telescope hasn’t even launched yet, but careful planning and simulation are already revealing what kinds of discoveries we can expect. If the predictions hold up, within a few years of operations Roman could give us a much sharper, and much stranger, picture of the hidden skeleton of the Milky Way. Hubble spots galaxy mid-transformation From hidden stellar corpses to a galaxy caught in the act of changing its entire identity, our next story zooms out to the wider universe. Astronomers using the Hubble Space Telescope have released new observations of NGC 1266, a lenticular galaxy about 100 million light-years away in the constellation Eridanus. Lenticular galaxies are often described as an intermediate class between spirals and ellipticals: they have a disk like a spiral but lack prominent spiral arms, and they tend to be much poorer in cold gas and young stars. What makes NGC 1266 special is that it appears to be in the middle of a rare and rapid transformation from an active, star-forming galaxy into a much more quiescent system. Earlier work had already suggested that NGC 1266 went through a burst of intense star formation that shut down roughly half a billion years ago, leaving behind unusually dense gas in its center and signs of powerful outflows. The newly highlighted Hubble views, together with data at other wavelengths, sharpen that picture: the galaxy shows clear evidence of a buried active galactic nucleus, a supermassive black hole that is accreting material and driving gas out of the regions where stars would otherwise form. You can think of it as a central engine that is both feeding and dieting at the same time, consuming some gas while flinging the rest back out. The result is that the fuel supply for new stars is being cut off, and the galaxy is quickly moving from the blue, star-forming population to the red, "retired" population. Catching a galaxy in this brief state is scientifically valuable because the transition is thought to happen relatively fast compared to a galaxy’s lifetime. Simulations of galaxy evolution often rely on feedback from black holes to explain why we see so many massive galaxies that are no longer forming stars. But it’s rare to find nearby systems where that feedback can be studied in detail as it operates. NGC 1266 offers exactly that: a close-up laboratory for how a central black hole can reshape a galaxy’s gas, shut down star formation, and nudge the system along the evolutionary path from spiral to lenticular to fully elliptical. It also underscores just how interconnected these scales are. A region only a few light-years across at the very center of a galaxy, where the black hole lives, can influence gas that stretches thousands of light-years through the disk. The new Hubble imagery and supporting observations do not just make for a pretty picture; they provide constraints on the speeds, directions, and compositions of outflowing material. Those can be fed back into models of galaxy growth, helping to answer questions about why the universe today looks the way it does, with its mix of vibrant star-forming galaxies and massive, red-and-dead giants. In short, NGC 1266 is a snapshot of galactic middle age in fast forward, and Hubble is giving us front-row seats. SpaceX Dragon CRS-34 docks with ISS For our final story, we come much closer to home, to a spacecraft arrival in Earth orbit that is very much a today event. NASA and SpaceX’s 34th Commercial Resupply Services mission, known as CRS-34, is in the process of bringing a fresh Dragon cargo ship into port at the International Space Station. The Falcon 9 rocket carrying Dragon lifted off from Cape Canaveral on the evening of May 15th, after a weather delay earlier in the week, sending up roughly 6,500 pounds of science experiments, crew supplies, and station hardware. After a couple of days chasing the orbiting complex, Dragon is scheduled to complete its autonomous rendezvous and docking this morning, latching on to the forward port of the Harmony module. On the surface, another cargo ship to the ISS might sound routine, but the contents of this particular Dragon highlight how the station continues to serve as a unique microgravity laboratory. Among the investigations on board is an experiment using a bone scaffold made from wood, which could open up new approaches to treating conditions like osteoporosis by studying how bone-like structures respond to weightlessness. Another payload is designed to examine how red blood cells and the spleen change in space, work that feeds directly into understanding long-term human health on missions to the Moon and Mars. There is also hardware aimed at evaluating how well Earth-based simulators reproduce true microgravity, which matters for everything from astronaut training to the design of future experiments. Beyond biology, CRS-34 is also carrying new instruments to study the space environment around Earth. One will monitor charged particles that can threaten satellites and power grids, giving researchers better data to improve space weather forecasting and understand how the near-Earth radiation environment evolves. Another instrument is set up to take very precise measurements of sunlight reflected by Earth and the Moon. That kind of radiometric data feeds into climate models, helps refine our knowledge of Earth’s energy balance, and even provides useful calibration for other space telescopes watching the cosmos from low Earth orbit. Once berthed, Dragon will remain attached to the station until mid-June. During that time, crew members will unpack the science, swap in fresh
