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© 2026 Developments Today. All rights reserved.

Betelgeuse is the red supergiant star in the shoulder of Orion. For decades, astronomers have suspected that Betelgeuse has a companion star orbiting around it. The image in the middle inset in this image was taken in January 2019 with the SPHERE instrument at ESO’s VLT, and shows Betelgeuse itself. The image in the inset on the left was taken in December 2024, when the companion was predicted to be furthest apart from Betelgeuse as seen from Earth. In this inset, Betelgeuse has been removed, revealing a source (marked with a crosshair) consistent with being Betelgeuse B. Credit: ESO/M. Montargès et al. Background: N. Rissinger (skysurvey.org)

Astronomers finally image Betelgeuse’s suspected companion star

Astronomers used ESO’s Very Large Telescope to identify a source consistent with Betelgeuse B.
The companion was imaged from 2024 data when it was predicted to be furthest from Betelgeuse in the sky.
Researchers estimate the companion may be about two to three times the Sun’s mass.

DE

DT Editorial Team·Jul 31, 2026·via universetoday.com

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Image of KSP-OT-202104a in a quiescent phase image made by stacking 549 x 60s exposures (Credit : Sang Chul Kim et al)

Astronomers Spot a Dwarf Nova Orbiting Below a Long-Standing Limit

Astronomers identified KSP-OT-202104a, a dwarf nova with a 72-minute orbit.
The system sits below the roughly 76-minute period minimum long used for dwarf novae.
Only ten such systems are known, and this team found two of them.
The companion star’s composition or evolutionary state may explain the unusually tight orbit.

DE

DT Editorial Team·Jun 25, 2026·via universetoday.com

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The path of a planet as it spirals into its star. The result is that the event tears the planet apart and sucks its elements into the star. Image credit: NASA, ESA, CSA, Ralf Crawford (STScI)

Astronomers report evidence a star consumed one of its planets

Researchers say unusual lithium levels in TOI-5882 suggest the star absorbed a planet.
A brown dwarf companion in the system may have destabilized the planet's orbit and sent it inward.
The finding highlights how astronomers use stellar spectra to reconstruct violent events in planetary systems.

DE

DT Editorial Team·Jun 25, 2026·via universetoday.com

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Artist's rendition of the birth of twin stars in the HOPS-312 system. Credit - NSF/AUI/NSF NRAO/B. Saxton

Young Binary Stars Appear to Form Through Disk Fragmentation, Not Chaotic Migration

A preprint examined 51 infant binary systems to test how close stellar pairs form.
Researchers used ALMA observations of gas outflows as a proxy for system angular momentum.
The observed alignments strongly favored disk fragmentation over turbulent fragmentation followed by inward migration.

DE

DT Editorial Team·May 3, 2026·via universetoday.com

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The images of Trumpler 3 and NGC 2353 are open clusters that contains hundreds of young stars that are gravitationally bound together because they formed from the same gas cloud. In this composite image of the clusters, X-rays from Chandra (purple) have been combined with an optical image from the PanSTARRS telescope in Hawaii (red, green, and blue). The stars look like fuzzy dots of different sizes dotting the darkness of space.

NASA Study Suggests Young Sun-Like Stars Calm Down Faster Than Expected

NASA says young Sun-like stars are dimmer in X-rays than previously thought.
The study examined eight clusters aged 45 million to 750 million years.
Lower-than-expected X-ray output could improve prospects for life on orbiting planets.

DE

DT Editorial Team·Apr 23, 2026·via nasa.gov

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stars

NASA Study Finds Young Sun-Like Stars Quiet Down in X-Rays Faster Than Expected

Chandra observations show young Sun-like stars emit fewer X-rays than expected over time.
A faster decline in X-ray activity may improve the odds that nearby planets retain atmospheres.
The result refines both stellar evolution models and assessments of planetary habitability.

DE

DT Editorial Team·Apr 15, 2026·via science.nasa.gov

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Starquake Models Tie White Dwarf Magnetism to Hidden Fields Inside Stars

New models connect white dwarf surface magnetism to interior magnetic evidence from starquakes.
The work supports the idea that some stellar magnetism is preserved over long evolutionary timescales.
The result gives astronomers a framework to relate magnetic fields in living stars to those in stellar remnants.

DE

DT Editorial Team·Apr 14, 2026·via phys.org

More in Science→

Tons of stars are seen against a dark sky.

Astronomers Find Rare Second-Generation Star From Ancient Universe

Astronomers discovered an extremely rare, iron-deficient second-generation star that formed from a single Population III supernova
The star's chemical fingerprint provides direct evidence of how the universe's first stars seeded heavy elements
Such stars were detected using high-resolution spectroscopy across databases of millions of stellar spectra
The findings help constrain the mass and explosion energetics of the universe's first stellar generation

DE

DT Editorial Team·Mar 19, 2026·4 min read·via space.com

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