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Astronomers Discover Potential Companion Star to Betelgeuse

Astronomers Discover Potential Companion Star to Betelgeuse

Astronomers have captured the clearest image yet of a faint star orbiting Betelgeuse, suggesting the red supergiant may have a companion star. This discovery was announced by the European Southern Observatory and detailed in the journal Astronomy & Astrophysics. The companion star, nicknamed Betelgeuse B, was identified using the Very Large Telescope. This finding could explain Betelgeuse's unusual brightness patterns, which deviate from its known 400-day cycle. The companion star is estimated to be two to three times more massive than the Sun.

Astronomers Confirm Betelgeuse Has a Companion Star Using Advanced Imaging

Astronomers Confirm Betelgeuse Has a Companion Star Using Advanced Imaging

Astronomers have obtained strong evidence that Betelgeuse, the red supergiant star in the Orion constellation, has a faint stellar companion. Using the European Southern Observatory’s Very Large Telescope (VLT), a team led by French researcher Miguel Montargès captured images of Betelgeuse B, the star predicted to orbit Betelgeuse. The discovery was made possible by a rare observational window in December 2024, when the companion appeared farthest from Betelgeuse as seen from Earth. The team used advanced image-reconstruction techniques to separate the faint companion from the bright source of Betelgeuse, revealing that Betelgeuse B is more massive than previously estimated.

Astronomers observe companion star orbiting stellar giant Betelgeuse

Astronomers observe companion star orbiting stellar giant Betelgeuse

By Will Dunham WASHINGTON, July 29 (Reuters) - Betelgeuse is a superstar among the stars — one of the brightest in the night sky, a massive red supergiant in the constellation Orion that sometimes brightens and dims, and adds to its allure with the fact that it may be on the brink of exploding.

Astronomers Capture Image of Betelgeuse's Suspected Companion Star

Astronomers Capture Image of Betelgeuse's Suspected Companion Star

Astronomers using the European Southern Observatory's Very Large Telescope have captured the clearest evidence yet of a faint companion star orbiting Betelgeuse, a red supergiant in the constellation Orion. Betelgeuse, located approximately 724 light-years from Earth, is nearing the end of its life span and is known for its massive size and luminosity. The discovery of the companion star, dubbed Betelgeuse B, was made using the SPHERE-ZIMPOL instrument, which is designed for high-contrast imaging. The companion star is estimated to be a young main-sequence star with a mass between 2.6 and 3.1 solar masses.

How The Petrova Line Works Within Project Hail Mary’s Fictional Science

How The Petrova Line Works Within Project Hail Mary’s Fictional Science

A deep dive into the Petrova Line from 'Project Hail Mary,' explaining the in-universe science and the real-world astrophysics that make it so compelling.

NASA's Swift Observatory Captures Rare Black Hole Event

NASA's Swift Observatory Captures Rare Black Hole Event

NASA's Neil Gehrels Swift Observatory has observed a rare astronomical event where a 'wandering' mega black hole shredded a star. This phenomenon, known as a tidal disruption event, was detected on the outskirts of a galaxy approximately 750 million light-years away. The black hole, weighing about a million times the Sun's mass, was first identified in November 2025 by the Zwicky Transient Facility. The event was notable for its location far from the galaxy's core, challenging previous assumptions about where such events occur.

James Webb Space Telescope Identifies Galaxies Behind Stars, Ruling Out Dyson Sphere Candidates

James Webb Space Telescope Identifies Galaxies Behind Stars, Ruling Out Dyson Sphere Candidates

The James Webb Space Telescope (JWST) has examined two stars previously suspected of harboring Dyson spheres, only to discover that the stars were actually aligned with distant galaxies. These galaxies were producing a warm infrared glow, which mimicked the waste heat expected from a hypothetical Dyson sphere. The research, led by astrophysicist Olivia Curtis of Pennsylvania State University, involved untangling light and working around JWST's quirks to reveal that the light from both stars was being boosted by a distant galaxy almost perfectly lined up behind them. This discovery not only ruled out the Dyson sphere candidates but also provided valuable insights for future searches, highlighting the importance of identifying false positives in the quest for alien technology.

Asteroid 44 Nysa Revealed to Have Unusual Shape and Moon

Asteroid 44 Nysa Revealed to Have Unusual Shape and Moon

Astronomers have discovered that the asteroid 44 Nysa, first identified in 1857, has a peculiar three-lobed shape and possibly its own tiny moon. This revelation was made possible through advanced observational techniques using the Large Binocular Telescope in Arizona and the Very Large Telescope in Chile. The asteroid, which is an E-type rich in enstatite, is located in the main asteroid belt between Mars and Jupiter. It is one of the brightest and largest E-type asteroids known, with an average diameter of about 75 kilometers. The three-dimensional model created by researchers shows that 44 Nysa has three distinct lobes connected by thin 'necks'. Additionally, a small moon, approximately one kilometer in diameter, was observed orbiting the asteroid.

Uranus' Unique Tilt Causes Extreme Seasonal Light Cycles

Uranus' Unique Tilt Causes Extreme Seasonal Light Cycles

Uranus, the seventh planet from the Sun, exhibits a unique axial tilt of approximately 97.8 degrees, causing it to roll around the Sun rather than spin upright like other planets. This extreme tilt results in each pole experiencing 42 years of continuous sunlight followed by 42 years of darkness. The phenomenon is due to Uranus' slow orbit around the Sun, which takes 84 Earth years to complete. The planet's unusual tilt is believed to be the result of a massive collision with an object twice the mass of Earth. Despite its peculiar rotation, Uranus spins relatively quickly, completing a rotation every 17 hours. However, the planet's atmosphere does not respond to sunlight in a straightforward manner, with some atmospheric changes lagging behind the sunlight by only a few years.

NASA Announces New Opportunity for Habitable Worlds Observatory Science Investigations

NASA Announces New Opportunity for Habitable Worlds Observatory Science Investigations

NASA has released Amendment 68, introducing a new opportunity for the Habitable Worlds Observatory Precursor Science Investigations (HWO-PSI). This initiative is part of the ROSES-2025 program and aims to advance the scientific foundation for a potential future mission designed to search for life beyond our solar system. The HWO mission concept, recommended by the National Academies' Astro2020 survey, focuses on transformative science across astrophysics and planetary science. The program invites proposals, with mandatory Notices of Intent due by September 10, 2026, and full proposals by October 26, 2026.

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.

National Science Foundation's Vera C. Rubin Observatory Faces Threat from Satellite Launches

National Science Foundation's Vera C. Rubin Observatory Faces Threat from Satellite Launches

A study by the European Southern Observatory (ESO) has highlighted the potential threat to ground-based astronomy from the planned launch of nearly 1.7 million satellites. The study, led by astronomer Olivier Hainaut, indicates that the Vera C. Rubin Observatory, funded by the U.S. National Science Foundation, could have several hours of observations rendered useless each night due to these satellites. The study warns that the night sky could become up to four times brighter, severely impacting astronomical research. The most disruptive satellites are expected to be those from Reflect Orbital, which are designed to beam concentrated sunlight to Earth at night.