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galaxies

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cosmology

Shadows in the Big Bang Afterglow Reveal Invisible Cosmic Structures

By Zack Savitsky
March 13, 2023
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Cosmologists are using secondary signatures from the cosmic microwave background to map the universe’s hidden matter.

golden planets look like they're moving through a twisting current
The Joy of Why

How Will the Universe End?

By Steven Strogatz
February 22, 2023
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Big Freeze, Big Rip, Big Crunch, Bounce or vacuum decay? Steven Strogatz speaks with theoretical cosmologist Katie Mack about the five ways that scientists think the universe could come to an end.

A panoramic image of the cosmos shows hundreds of galaxies, including four blobs of light that are magnified and labeled with their corresponding redshifts.
astrophysics

Standard Model of Cosmology Survives a Telescope’s Findings

By Rebecca Boyle
January 20, 2023
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Reports that the James Webb Space Telescope killed the reigning cosmological model turn out to have been exaggerated. But astronomers still have much to learn from distant galaxies glimpsed by Webb.

cosmology

Asymmetry Detected in the Distribution of Galaxies

By Katie McCormick
December 5, 2022
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Two new studies suggest that certain tetrahedral arrangements of galaxies outnumber their mirror images, potentially reflecting details of the universe’s birth. But confirmation is needed.

astrophysics

The Enduring Mystery of the Dragonfly 44 Galaxy

By Lyndie Chiou
November 7, 2022
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A growing catalog of huge but dim galaxies such as Dragonfly 44 is forcing astronomers to invent new theories of galactic evolution.

An illustration of a blue swirling galaxy inside an amillary sphere. A black hole appears in the center.
black holes

What Drives Galaxies? The Milky Way’s Black Hole May Be the Key.

By Thomas Lewton
August 23, 2022
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Supermassive black holes have come to the fore as engines of galactic evolution, but new observations of the Milky Way and its central hole don’t yet hang together.

Image of a spiral galaxy strewn with ribbons of pink light.]
astronomy

Two Weeks In, the Webb Space Telescope Is Reshaping Astronomy

By Jonathan O'Callaghan
July 25, 2022
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In the days after the mega-telescope started delivering data, astronomers reported new discoveries about galaxies, stars, exoplanets and even Jupiter.

A grid of 66 galaxies.
astrophysics

Tiny Galaxies Reveal Secrets of Supermassive Black Holes

By Charlie Wood
March 14, 2022
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Dwarf galaxies weren’t supposed to have big black holes. Their surprise discovery has revealed clues about how the universe’s biggest black holes could have formed.

2021 in Review

The Year in Physics

By Michael Moyer
December 22, 2021
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Puzzling particles, quirky (and controversial) quantum computers, and one of the most ambitious science experiments in history marked the year’s milestones.


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