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NASA's Juno Finds Io's Subsurface Hotter Than Expected

NASA's Juno Finds Io's Subsurface Hotter Than Expected

NASA's Juno spacecraft has discovered that Jupiter's moon Io has subsurface temperatures higher than previously predicted by models. During two recent flybys, Juno detected these elevated temperatures, which are attributed to Io's extreme volcanic activity driven by tidal flexing from Jupiter's gravity. The findings also revealed that large areas of Io's surface are smoother than anticipated. These observations will be used to refine models of how internal heat moves through Io's crust and escapes, providing new insights into the moon's geological processes.

NASA's Juno Reveals Unexpected Heat in Io's Subsurface

NASA's Juno Reveals Unexpected Heat in Io's Subsurface

NASA's Juno spacecraft has discovered that Jupiter's moon Io is hotter beneath its surface than previously predicted by scientific models. During two recent flybys, Juno detected subsurface temperatures that exceeded expectations, despite Io's known extreme volcanic activity. The findings also revealed that large areas of Io's surface are smoother than anticipated. These observations are significant as Io is the most volcanically active body in the solar system, with its internal heat driven by tidal forces from Jupiter's gravity. The data collected will help refine models of heat distribution and surface dynamics on Io.

NASA's Swift Observatory Detects Wandering Black Hole Consuming Star

NASA's Swift Observatory Detects Wandering Black Hole Consuming Star

NASA's Neil Gehrels Swift Observatory has observed a supermassive black hole, located unusually far from the center of its galaxy, as it devours a star. This event, known as a tidal disruption event, is rare and marks the first time such an occurrence has been detected so far from a galactic core. The black hole, with a mass approximately 1 million times that of the Sun, was first identified by the Zwicky Transient Facility in November 2025. The flare produced by the star's destruction was exceptionally bright, temporarily shining with the brilliance of about 10 billion suns. This discovery validates a new technique for identifying supermassive black holes that are not located at the centers of galaxies.

JWST Debunks Dyson Sphere Candidates, Reveals Hidden Galaxies

JWST Debunks Dyson Sphere Candidates, Reveals Hidden Galaxies

The James Webb Space Telescope (JWST) has examined two stars previously suspected of harboring Dyson spheres, revealing them to be false positives. The study, led by astrophysicist Olivia Curtis from Pennsylvania State University, found that the stars' infrared excess was due to distant galaxies aligned behind them, not megastructures built by alien civilizations. The galaxies, identified as a Hot Dust-Obscured Galaxy and a dusty starburst galaxy, naturally emit the warm infrared glow initially attributed to Dyson spheres. This discovery highlights the challenges in searching for extraterrestrial technosignatures and the need for advanced techniques to differentiate between natural and artificial sources of infrared radiation.

Researchers Identify Potential First Exomoon Orbiting Brown Dwarf

Researchers Identify Potential First Exomoon Orbiting Brown Dwarf

Astronomers have potentially identified the first exomoon, named CD-35 2722 B, orbiting a brown dwarf rather than a traditional planet. This discovery was made using radial velocity analysis, a technique that detects wobbles in stars to indicate the presence of nearby exoplanets. The exomoon is approximately 90% the size of Jupiter and takes 170 days to orbit its host. The lack of a standard definition for what constitutes a moon complicates the classification of this celestial body. The findings, led by Kevin Hoy, a PhD student at the Instituto de Estudios Astrofísicos, challenge existing astronomical definitions and open new avenues for research.

Astronomers Detect First Plausible Exomoon Using Radial-Velocity Method

Astronomers Detect First Plausible Exomoon Using Radial-Velocity Method

Astronomers have made a significant breakthrough by detecting what could be the first plausible exomoon using the radial-velocity method. This discovery was made in the CD-35 2722 system, where a brown dwarf exhibited a wobble indicative of an orbiting body. The object, with a mass close to Jupiter's, challenges traditional definitions of a moon, as it orbits a brown dwarf rather than a planet. This detection marks a milestone in astronomical research, as finding exomoons has proven more challenging than initially expected due to their small size and dimness compared to their host bodies.

Astronomers Confirm Four White Dwarfs Hidden by Red Dwarfs Within 65 Light-Years

Astronomers Confirm Four White Dwarfs Hidden by Red Dwarfs Within 65 Light-Years

Astronomers have confirmed the existence of four white dwarfs within 65 light-years of Earth, previously hidden by the glare of their red dwarf companions. This discovery was made possible through ultraviolet observations from the Hubble Space Telescope, which allowed researchers to distinguish the faint remnants from the brighter stars. The study, led by the University of Warwick and the University of Colorado Boulder, was published in the Monthly Notices of the Royal Astronomical Society. One of these white dwarfs, part of the G 203-47 system, is now recognized as the ninth closest white dwarf to the Sun. The findings highlight the challenges in detecting such stellar remnants due to the masking effect of their brighter companions.

GJ 887 d: Second Closest Habitable-Zone Planet Confirmed

GJ 887 d: Second Closest Habitable-Zone Planet Confirmed

Astronomers have confirmed the existence of GJ 887 d, a potentially habitable planet orbiting a red dwarf star 10.7 light-years away. This discovery makes GJ 887 d the second-closest known planet in a star's habitable zone after Proxima Centauri b. The confirmation was made through precise radial-velocity measurements, which detected the planet's influence on its star. GJ 887 d orbits its star every 50.77 days, placing it within the habitable zone where conditions might support liquid water.

GJ 887 d: Second Closest Potentially Habitable Planet Confirmed

GJ 887 d: Second Closest Potentially Habitable Planet Confirmed

Astronomers have confirmed the existence of GJ 887 d, a potentially habitable planet located 10.7 light-years away from Earth. This planet orbits a red dwarf star, GJ 887, and is the second-closest known planet in a star's habitable zone after Proxima Centauri b. The confirmation was made using radial velocity measurements, which detected the planet's gravitational influence on its star. GJ 887 d has a minimum mass about six times that of Earth, but its exact nature, whether rocky or gas-rich, remains unknown. The planet's potential habitability is still under investigation, as factors like its atmosphere and magnetic field are yet to be determined.

NASA Highlights Lunar Maria: Tranquility and Serenity's Historical Significance

NASA Highlights Lunar Maria: Tranquility and Serenity's Historical Significance

NASA's Astronomy Picture of the Day for July 25, 2026, features the lunar maria known as the Seas of Tranquility and Serenity. These regions, Mare Tranquillitatis and Mare Serenitatis, are ancient lava flows that fill large impact basins on the Moon. Historically, these areas were named based on pre-telescopic observations, which likened them to Earth's oceans. The Mare Tranquillitatis is notably significant as the landing site of the Apollo 11 lunar module, marking the first human presence on the Moon on July 20, 1969.

Meteor Showers to Peak Amid Bright Moonlight, Challenging Skywatchers

Meteor Showers to Peak Amid Bright Moonlight, Challenging Skywatchers

Meteor Showers to Peak Amid Bright Moonlight, Challenging Skywatchers

NASA Celebrates 50th Anniversary of Viking 1's Historic Mars Landing

NASA Celebrates 50th Anniversary of Viking 1's Historic Mars Landing

NASA commemorates the 50th anniversary of the Viking 1 mission, which marked humanity's first successful landing on Mars and the transmission of images from the Martian surface. Viking 1 landed on July 20, 1976, and provided the first view of Mars' surface, revealing a rocky terrain. The mission was a significant milestone in space exploration, paving the way for future Mars missions. Viking 1's success demonstrated the feasibility of landing on another planet and conducting scientific experiments remotely.