The space telescope has captured the spiral galaxy NGC 7469 in the constellation Pegasus. An active supermassive black hole lurks at its bright center, surrounded by a ring of intense star formation, making this object key to studying the evolution of the Universe.
For more than three decades, Neptune’s rings essentially vanished from human sight. It took an infrared camera orbiting a million miles from Earth to finally bring them back into sharp focus. In 1989, NASA’s Voyager 2 spacecraft swept past Neptune and captured a few grainy images of its faint rings from roughly a million kilometers away before sailing on into the outer solar system. After that brief encounter, the rings—dark, dusty, and reflecting almost no visible light—slipped back into obscurity. Even the most powerful ground-based telescopes and Hubble struggled to detect them clearly. Then the James Webb Space Telescope turned its Near-Infrared Camera on the distant ice giant. Observing in near-infrared wavelengths rather than visible light, Webb’s ultra-stable optics pierced the darkness and revealed not only Neptune’s brighter rings but also its extremely faint dust bands in unprecedented detail—something never achieved before. That’s also why Neptune itself looks so dramatically different here. In familiar Hubble images the planet glows a vivid blue. In Webb’s infrared view it appears mostly dark, because methane in the atmosphere strongly absorbs red and infrared light. Only the high-altitude methane-ice clouds shine brightly, reflecting sunlight before the gas can swallow it. A planet’s true appearance can change completely depending on the kind of light you use to photograph it—and Neptune’s rings, long hidden, are proof of just how much the universe still keeps in reserve.
High-resolution observations from telescopes like ALMA and the James Webb Space Telescope (JWST) have unveiled stunning details of a young star encircled by a protoplanetary disk teeming with actively forming planets. Dramatic gaps, sweeping spirals, and prominent dense rings etched into the disk reveal where newborn worlds are aggressively gathering material, wielding their gravity to sculpt and reorganize their surroundings.In remarkable cases, direct infrared imaging has even captured these fledgling planets—still deeply nestled in swirling gas and dust—glowing brightly from the intense heat released during their accretion frenzy.This breakthrough is profoundly significant. For decades, planet formation was pieced together only indirectly, pieced from clues in fully mature systems like our Solar System. Now, these vivid, real-time snapshots offer direct proof of how planets take shape, migrate, and dynamically interact while their natal disk remains active. They demonstrate that planet formation kicks off remarkably early—often within just a few million years after a star ignites—and that these infant giants exert powerful influence on the disk's architecture.By witnessing the process unfold live, astronomers can rigorously test and refine theoretical models of planetary growth, orbital migration, and the emergence of the astonishing variety of planetary systems scattered throughout our galaxy. (Sources: NASA, James Webb Space Telescope, ALMA Observatory, Nature Astronomy, Astrophysical Journal, and recent studies from 2024–2026)
Astronomers have discovered what remains after two stars collide and merge in an explosion known as a luminous red nova. Using the James Webb Space Telescope (JWST), scientists studied these rare events and found that the merger creates a huge, cool star similar to a red supergiant. The research team analyzed nine past luminous red novas and focused on two well-documented cases, AT 2011kp and AT 1997bs, which occurred in galaxies tens of millions of light-years away. Years after the explosions, JWST’s powerful infrared vision was able to see through thick clouds of dust thrown out during the merger. The observations showed that the remaining object is hundreds of times larger than the Sun but much cooler at its surface. This result surprised scientists, who expected a smaller, hotter star. The team also found that the surrounding dust is rich in carbon-based compounds, which are essential for life. Because luminous red novas produce large amounts of this dust, they may have helped spread the raw materials needed for life throughout galaxies, including our own. Credit: A. Reguitti, A. Adamo/NASA/ESA/CSA
https://apod.nasa.gov/apod/ap250526.html
