Cosmology News

March 27, 2025

Top Headlines

New DESI Results Strengthen Hints That Dark Energy May Evolve

Mar. 20, 2025 — The Dark Energy Spectroscopic Instrument used millions of galaxies and quasars to build the largest 3D map of our universe to date. Combining their data with other experiments shows signs that the impact of dark energy may be weakening over time -- ...

Treasure Trove of Galaxies, Glimpses of Deep Fields

Mar. 19, 2025 — On 19 March 2025, the European Space Agency's Euclid mission releases its first batch of survey data, including a preview of its deep fields. Here, hundreds of thousands of galaxies in different shapes and sizes take center stage and show a glimpse ...

Violent Supernovae 'Triggered at Least Two Earth Extinctions'

Mar. 13, 2025 — At least two mass extinction events in Earth's history were likely caused by the 'devastating' effects of nearby supernova explosions, a new study suggests. Researchers say these super-powerful blasts -- caused by the death of a massive star -- may ...

Oxygen Discovered in Most Distant Known Galaxy

Mar. 20, 2025 — Astronomers have detected oxygen in the most distant known galaxy, JADES-GS-z14-0. This record-breaking detection is making astronomers rethink how quickly galaxies formed in the early ...

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Small, Faint and 'Unexpected in a Lot of Different Ways': Astronomers Make Galactic Discovery

Mar. 11, 2025 — The discovery of the dwarf galaxy Andromeda XXXV --located roughly 3 million light-years away and the smallest yet found in the Andromeda system -- ...

Black Holes: Not Endings, but Beginnings? New Research Could Revolutionize Our Understanding of the Universe

Mar. 12, 2025 — New research suggests black holes may transition into 'white holes', ejecting matter and potentially even time back into the universe, defying our ...

Four Tiny Planets Found Orbiting One of Our Nearest Stars

Mar. 11, 2025 — Astronomers have revealed new evidence that there are not just one but four tiny planets circling around Barnard's Star, the second-nearest star system to ...

James Webb Space Telescope Reveals Unexpected Complex Chemistry in Primordial Galaxy

Mar. 10, 2025 — Astronomers have peered back to a time when the universe was just less than 300 million years old. The research team, using JWST revealed something ...

Mysterious Phenomenon at Center of Galaxy Could Reveal New Kind of Dark Matter

Mar. 10, 2025 — A mysterious phenomenon at the center of our galaxy could be the result of a different type of dark ...

How Do the Universe's Highest-Energy Particles Originate? Magnetic Outflows Stemming from Star Mergers, Analysis Concludes

Feb. 28, 2025 — Physicists provide a viable and testable explanation for how UHECRs are ...

NASA's Hubble Provides Bird's-Eye View of Andromeda Galaxy's Ecosystem

Feb. 27, 2025 — Located 2.5 million light-years away, the majestic Andromeda galaxy appears to the naked eye as a faint, spindle-shaped object roughly the angular size of the full Moon. What backyard observers don't ...

In Ancient Stellar Nurseries, Some Stars Are Born of Fluffy Clouds

Feb. 20, 2025 — Researchers have found that stars in the early universe may have formed from 'fluffy' molecular clouds. Using the ALMA telescope to observe the Small Magellanic Cloud -- whose environment is similar ...

300 New Intermediate-Mass Black Holes Plus 2500 New Active Black Holes in Dwarf Galaxies Discovered

Feb. 19, 2025 — Within the Dark Energy Spectroscopic Instrument's early data, scientists have uncovered the largest samples ever of intermediate-mass black holes and ...

Does Planetary Evolution Favor Human-Like Life? Study Ups Odds We're Not Alone

Feb. 14, 2025 — Humanity may not be extraordinary but rather the natural evolutionary outcome for our planet and likely others, according to a new model for how ...

'Game Changing' Release of Type Ia Supernovae Data May Hold Key to the History of the Universe

Feb. 14, 2025 — A unique dataset of Type Ia Supernovae being released today could change how cosmologists measure the expansion history of the ...

First Detection of an Ultra-High-Energy Neutrino

Feb. 12, 2025 — Scientists have just detected a neutrino that is thirty times more energetic than any previously detected anywhere in the world. This exceptional discovery opens up new perspectives for understanding ...

Euclid Discovers a Stunning Einstein Ring

Feb. 10, 2025 — Euclid, the European Space Agency's dark Universe detective, has made an astonishing discovery -- right in our cosmic ...

New Technique to Detect Dark Matter Using Atomic Clocks and Lasers

Feb. 6, 2025 — A team of international researchers has developed an innovative approach to uncover the secrets of dark matter in the cosmos. They are searching for dark matter using atomic clocks and ...

Largest Radio Jet Ever Seen in the Early Universe

Feb. 6, 2025 — Astronomers have characterized the largest-ever early-Universe radio jet. Historically, such large radio jets have remained elusive in the distant Universe. With these observations, astronomers have ...

Quantum Machine Offers Peek Into 'Dance' of Cosmic Bubbles

Feb. 4, 2025 — Physicists have performed a groundbreaking simulation they say sheds new light on an elusive phenomenon that could determine the ultimate fate of the ...

A Less 'Clumpy,' More Complex Universe?

Jan. 29, 2025 — New research has combined cosmological data from two major surveys of the universe's evolutionary history and found hints that it may be less clumpy at certain points than previously thought. ...

The Hidden Power of the Smallest Microquasars

Jan. 29, 2025 — Researchers found for the first time evidence that even microquasars containing a low-mass star are efficient particle accelerators, which leads to a significant impact on the interpretation of the ...

A Super-Earth Laboratory for Searching Life Elsewhere in the Universe

Jan. 28, 2025 — Thirty years after the discovery of the first exoplanet, we detected more than 7000 of them in our Galaxy. But there are still billions more to be discovered! At the same time, exoplanetologists have ...

How Galaxies Are Clustered and Threaded Throughout the Universe

Jan. 21, 2025 — A new computational method gleans more information than its predecessors from maps showing how galaxies are clustered and threaded throughout the ...

NASA's Hubble Traces Hidden History of Andromeda Galaxy

Jan. 17, 2025 — In the years following the launch of NASA's Hubble Space Telescope, astronomers have tallied over 1 trillion galaxies in the universe. But only one galaxy stands out as the most important nearby ...

The Universe Is Expanding Too Fast to Fit Theories: Hubble Tension in Crisis

Jan. 17, 2025 — The Universe really seems to be expanding fast. Too fast, even. A new measurement confirms what previous -- and highly debated -- results had shown: The Universe is expanding faster than predicted by ...

This Tiny Galaxy Is Answering Some Big Questions

Jan. 16, 2025 — Leo P, a small galaxy and a distant neighbor of the Milky Way, is lighting the way for astronomers to better understand star formation and how a galaxy grows. Scientists have reported finding that ...

NASA Celebrates Edwin Hubble's Discovery of a New Universe

Jan. 15, 2025 — For humans, the most important star in the universe is our Sun. The second-most important star is nestled inside the Andromeda galaxy. Don't go looking for it -- the flickering star is 2.2 ...

This Quasar May Have Helped Turn the Lights on for the Universe

Jan. 15, 2025 — Astronomers have detected an intensely brightening and dimming quasar that may help explain how some objects in the early universe grew at a highly accelerated rate. The discovery is the most distant ...

Three Tiny 'Stellar-Ghost-Town' Galaxies Discovered

Jan. 15, 2025 — By combining data from the DESI Legacy Imaging Surveys and the Gemini South telescope, astronomers have investigated three ultra-faint dwarf galaxies that reside in a region of space isolated from ...

New Study Unveils Breakthrough in Understanding Cosmic Particle Accelerators

Jan. 13, 2025 — Scientists have come a step closer to understanding how collisionless shock waves -- found throughout the universe -- are able to accelerate particles to extreme ...

Beyond the 'Dragon Arc', a Treasure Trove of Unseen Stars

Jan. 6, 2025 — Taking advantage of a cosmic 'double lens,' astronomers resolved more than 40 individual stars in a galaxy so far away its light dates back to when the universe was only half its present ...

Dark Energy 'Doesn't Exist' So Can't Be Pushing 'Lumpy' Universe Apart

Dec. 20, 2024 — One of the biggest mysteries in science -- dark energy -- doesn't actually exist, according to researchers looking to solve the riddle of how the Universe is expanding. For the past 100 years, ...

Clever Trick to Cook Stars Like Christmas Pudding Detected for First Time

Dec. 20, 2024 — Researchers have found evidence of magnetic fields associated with a disc of gas and dust a few hundred light-years across deep inside a system of two merging galaxies known as Arp220. They say these ...