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galaxies Articles | Developments Today

Hubble Captures a Spiral Galaxy Powered by a Hungry Black Hole

NASA released a new Hubble image of barred spiral galaxy IC 486.
The galaxy sits about 380 million light-years away and shows both old and young stellar regions.
Its bright center is powered by an active galactic nucleus around a supermassive black hole.

DE

DT Editorial Team·Apr 13, 2026·via science.nasa.gov

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Image of the NGC 1052-DF2 Ultra Diffuse Galaxy that started the chain of discoveries of galaxies lacking dark matter. Credit - NASA, ESA, and P. van Dokkum (Yale)

Astronomers report a third galaxy that appears to lack dark matter

Astronomers report a third galaxy that appears to be missing dark matter.
The finding supports the controversial ‘Bullet Dwarf’ collision scenario.
Such galaxies are important tests for dark matter and modified gravity theories.

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DT Editorial Team·Apr 8, 2026·via universetoday.com

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Astronomers studied more than 1 million galaxies and more than 8,000 growing supermassive black holes (SMBH) over billions of years to try to answer a difficult question. During Cosmic Noon about 10 billion years ago, the growth of SMBH began to slow dramatically. The image on the left represents one of the rapidly-growing SMBH in the past, and the image on the right represents a slower-growing SMBH about 3 billion light-years away. Image Credit: X-ray: NASA/CXC/Penn State Univ./Z. Yu; Optical (HST): NASA/ESA/STScI; Infrared: NASA/ESA/CSA/STScI; Image Processing: NASA/CXC/SAO/P. Edmonds, L. Frattare

Astronomers Trace the Long Slowdown in Supermassive Black Hole Growth

Researchers studied more than 1 million galaxies and over 8,000 growing supermassive black holes.
The study says black hole growth peaked around z ≈ 1.5 to 2 and then declined.
A leading explanation is the reduced availability of cold gas needed for accretion.

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DT Editorial Team·Apr 8, 2026·via universetoday.com

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Starburst galaxy M82, otherwise known as the Cigar Galaxy (Credit : NASA/ESA)

XRISM Measures a Galactic Wind at the Heart of M82

XRISM measured hot gas in M82 moving outward at more than 3.2 million kilometers per hour.
The gas temperature is reported at about 25 million degrees Celsius.
The result supports stellar wind and supernova shockwaves as the main drivers of the galaxy’s outflow.

DE

DT Editorial Team·Mar 30, 2026·via universetoday.com

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NASA-JAXA’s XRISM Telescope Clocks Hot Wind of Galaxy M82

XRISM Measures the Speed of M82’s Superheated Galactic Wind for the First Time

XRISM directly measured superheated gas in M82 moving at more than 2 million miles per hour.
Researchers say the hot outflow appears to drive the galaxy’s larger cool wind.
The result was published in Nature and helps test long-standing models of starburst feedback.

DE

DT Editorial Team·Mar 25, 2026·via science.nasa.gov

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A grid showing 18 dusty galaxies that look like reddish splotches and golden splotches.

70 Ancient Dusty Galaxies at the Edge of the Universe Could Rewrite Cosmic History

48 astronomers from 14 countries identified 70 dusty galaxies from the universe's first billion years using JWST and ALMA
The galaxies show surprising levels of metals and dust, suggesting multiple generations of stars had already lived and died
They may represent the missing evolutionary link between bright early galaxies and dead quiescent ones
Current cosmological models did not predict this level of chemical enrichment so early in cosmic history
The findings were published in The Astrophysical Journal Letters on February 20, 2026

DE

DT Editorial Team·Feb 21, 2026·7 min read·via space.com

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