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astronomy Articles | Developments Today

The Universe’s biggest black holes may be forged in violent mergers

Gravitational-Wave Data Suggest the Biggest Black Holes Are Built Through Repeated Collisions

Researchers analyzed 153 reliable black hole merger detections from GWTC4.
The most massive black holes appear to form through hierarchical mergers.
Dense star clusters may enable repeated black hole collisions.
Spin signatures suggest a separate high-mass black hole population.

DE

DT Editorial Team·May 9, 2026·via sciencedaily.com

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Interstellar comet 3I/ATLAS contains strange water never seen in our solar system

Interstellar comet 3I/ATLAS carries heavy water unlike anything seen in the solar system

3I/ATLAS is only the third confirmed interstellar visitor detected.
Researchers found unusually high deuterium levels in its water.
The chemistry suggests the comet formed in much colder conditions than our solar system.

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DT Editorial Team·May 8, 2026·via sciencedaily.com

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Interstellar comet 3I/ATLAS (C/2025 N1) captured by the Subaru Telescope on December 13th, 2025. Credit: NAOJ

Subaru Telescope Data Suggests 3I/ATLAS Has a More Complex Interior Than Earlier Readings Indicated

Subaru observed 3I/ATLAS after perihelion and analyzed light from its coma.
The team found a lower carbon-dioxide-to-water ratio than earlier space-based observations suggested.
Researchers say the result points to evolving coma chemistry and offers clues about the object’s interior structure.

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DT Editorial Team·May 7, 2026·via universetoday.com

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Artist's impression of the Cygnus X-1 binary system. Credit: ICRAR

Black Hole Jets in Cygnus X-1 Measured at Power Equivalent to 10000 Suns

Researchers used 18 years of radio imaging to study jets in Cygnus X-1.
The jets were measured at a power equivalent to 10,000 Suns.
The team estimated jet speeds at roughly half the speed of light.

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DT Editorial Team·May 7, 2026·via universetoday.com

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Neutron star illustration

NASA’s Roman Telescope Could Reveal Dozens of Invisible Neutron Stars

A new study says Roman could identify and characterize dozens of isolated neutron stars.
The telescope would use astrometric microlensing to detect otherwise invisible objects.
Roman’s precision may also help astronomers estimate neutron star masses.

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DT Editorial Team·May 6, 2026·via nasa.gov

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Citizen Scientists Help NASA Double the Known Brown Dwarf Count

NASA volunteers discovered more than 3,000 brown dwarfs over 10 years.
The new paper says the effort effectively doubled the known brown dwarf population.
The expanded catalog has already revealed extreme T subdwarfs and other rare objects.
Roughly 200,000 volunteers contributed through the Backyard Worlds: Planet 9 project.

DE

DT Editorial Team·May 5, 2026·via science.nasa.gov

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Astronomers Detect First Pluto Cousin With Thin Atmosphere

A Thin Atmosphere Found Around a Pluto Cousin Is Rewriting Assumptions About the Outer Solar System

Scientists confirmed a thin atmosphere around trans-Neptunian object 2002 XV93.
It is the first such object beyond Pluto known to have an atmosphere.
Researchers used a stellar occultation and light-curve analysis to infer its presence.
The result suggests the outer solar system may be more dynamic than previously thought.

DE

DT Editorial Team·May 4, 2026·via gizmodo.com

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Scientists have found thousands of exoplanets throughout the galaxy. They vary widely, from small, rocky worlds and gas giants to water-rich planets and those as hot as stars. Credit: NASA GSFC

A New Solar Telescope at Paranal Is Being Built to Help Exoplanet Hunters Subtract a Star’s Noise

PoET has begun observations at ESO’s Paranal site in Chile.
The telescope studies the Sun to help astronomers model stellar noise in exoplanet data.
Its work supports the search for rocky Earth-like planets around Sun-like stars.

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DT Editorial Team·May 4, 2026·via universetoday.com

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A dark blue night sky is streaked with white meteors moving through space with a rusty cylindrical water tower below.

Eta Aquariid Meteor Shower to Peak May 5-6 as Earth Crosses Halley’s Debris Trail

The Eta Aquariid meteor shower is expected to peak overnight on May 5-6, 2026.
The shower is created by debris left behind by Halley’s Comet.
Moonlight may make dimmer meteors harder to see this year.

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DT Editorial Team·May 3, 2026·via livescience.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.

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

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An artist

Astronomers Report More Than 11,000 Exoplanet Candidates in a Single Machine-Learning Sweep

A preprint reports 11,554 exoplanet candidates found in TESS data.
The search analyzed light curves from 83,717,159 stars using machine learning.
The candidates are not yet confirmed and the study has not been peer reviewed.

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

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Moon phase today explained: What the Moon will look like on May 2, 2026

Moon remains fully lit after May’s first full moon, with a second full moon due on May 31

May 2 is a waning gibbous Moon, but the source says 100% remains lit.
Several lunar features are visible with the naked eye, binoculars, or a telescope.
A second full moon in May 2026 is expected on May 31.

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DT Editorial Team·May 2, 2026·via mashable.com

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Full Moon May 2026: When to see the full moon, what it's called

May opens with the Flower Moon and an unusually full lunar calendar

Mashable’s supplied text identifies May 1 as the date of the Flower Moon.
It also notes a second full moon on May 31, creating a Blue Moon month.
The Flower Moon name is tied to seasonal spring blooms.
The story highlights how astronomy and cultural naming traditions intersect.

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DT Editorial Team·May 1, 2026·via mashable.com

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hubble

Hubble’s New Spiral Portrait Offers a Nearby Lab for Galactic Evolution

NGC 3137 is a spiral galaxy 53 million light-years away.
The galaxy belongs to a group that may resemble the Milky Way’s Local Group.
NASA says the image can help researchers study star formation and black-hole growth.

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DT Editorial Team·May 1, 2026·via science.nasa.gov

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The rings of Uranus are even stranger than we thought

Uranus's Outer Rings May Be Far More Different Than Astronomers Expected

Researchers combined Keck, Hubble and JWST data spanning nearly two decades.
The mu ring appears icy and blue, while the nu ring appears dusty and red.
Brightness changes in the nu ring may point to a past collision event.

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DT Editorial Team·May 1, 2026·via newscientist.com

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Artist's illustration of an ultracool dwarf star and an orbiting exoplanet. (Credit: NASA/JPL-Caltech)

Canada’s proposed POET microsatellite would target Earth-sized worlds around ultracool stars

Canada’s proposed POET mission would focus on Earth-sized planets around small, cool stars.
A 20-centimeter telescope would observe in near-UV, visible and near-infrared bands.
The mission builds on prior Canadian microsatellite programs MOST and NEOSSat.

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DT Editorial Team·Apr 29, 2026·via universetoday.com

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Image of the Milky Way above Paranal, Chile on 21 July 2007. (Credit : ESO/Y.Beletsky)

Why the Milky Way’s Southern Halo Runs Hotter Than the North

Researchers link the Milky Way’s hotter southern halo to compression caused by the galaxy’s motion toward the Large Magellanic Cloud.
The model matches eROSITA observations showing the southern halo is about 12% warmer than the north.
The explanation may also account for why cooler fast-moving gas clouds are seen more often in the northern halo.

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DT Editorial Team·Apr 29, 2026·via universetoday.com

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LRG 3-757 is a fabulous example of an einstein ring and now, a team of scientists want your help to find them (Credit : ESA/Hubble)

Euclid’s Huge New Sky Dataset Is Sending Citizen Scientists Hunting for Gravitational Lenses

Euclid’s latest data release covers roughly 72 million galaxies, far larger than its initial dataset.
AI has already flagged about 300,000 candidate images, but astronomers still want the public to help identify true lenses.
Gravitational lenses are valuable because they magnify distant objects and help scientists study mass distribution in the universe.

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DT Editorial Team·Apr 28, 2026·via universetoday.com

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A ball of yellow and pink sits behind a wall of pink gas with ripples of black and green gridded fabric in the foreground.

AI Cosmology Tool Promises Sharper View of How the Universe Changes

Researchers describe a new AI approach intended to improve reconstruction of cosmic change from observational data.
The method targets a known weakness in genetic algorithms: unstable estimates of derivatives and other nonobservable quantities.
If validated, the technique could strengthen tests of the standard cosmological model and help probe unresolved tensions in the field.

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DT Editorial Team·Apr 28, 2026·via livescience.com

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Image of the Milky Way with its prominent central bar. Credit - NASA/JPL-Caltech/ESO/R. Hurt

Astronomers Pin Down the Outer Limit of the Milky Way’s Star-Forming Disc

Researchers say the Milky Way’s star-forming disc ends roughly 40,000 light-years from the galactic center.
The conclusion comes from age analysis of more than 100,000 giant stars using several survey datasets.
Older stars beyond that boundary are thought to be migrants pushed outward by spiral arms or the central bar.

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DT Editorial Team·Apr 28, 2026·via universetoday.com

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