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astronomy

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nonlinear dynamics

New Proof Finds the ‘Ultimate Instability’ in a Solar System Model

By Jordana Cepelewicz
May 16, 2023
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For the first time, mathematicians have proved that planetary orbits in a solar system will always be unstable.

astrophysics

Astronomers Dig Up the Stars That Birthed the Milky Way

By Lyndie Chiou
March 28, 2023
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There once was a cosmic seed that sprouted the Milky Way galaxy. Astronomers have discovered its last surviving remnants.

simulated image of two celestial bodies interacting
astrophysics

What Lights the Universe’s Standard Candles?

By Lyndie Chiou
February 8, 2023
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Type Ia supernovas are astronomers’ best tools for measuring cosmic distances. In a first, researchers have managed to re-create one on a supercomputer, giving a boost to a leading hypothesis for how they form.

A graphical illustration showing a number of well-known stars in the present-day universe, along with the edge of a far bigger star.
astronomy

Astronomers Say They Have Spotted the Universe’s First Stars

By Jonathan O'Callaghan
January 30, 2023
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Theory has it that “Population III” stars brought light to the cosmos. The James Webb Space Telescope may have just glimpsed them.

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.

2022 in Review

The Year in Physics

By Natalie Wolchover
December 22, 2022
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In a year filled with sweet new observations in astronomy and tantalizing breakthroughs in condensed matter physics, the brand-new space telescope takes the cake.

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.

Lisa Kaltenegger, a woman with red hair, peers through the eyepiece of an antique telescope.
astrobiology

A Dream of Discovering Alien Life Finds New Hope

By Joshua Sokol
November 3, 2022
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For Lisa Kaltenegger and her generation of exoplanet astronomers, decades of planning have set the stage for an epochal detection.

A yellow and orange blob of light appears against a purple grainy background.
astronomy

Webb Space Telescope Snaps Its First Photo of an Exoplanet

By Jonathan O'Callaghan
September 1, 2022
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The grainy image of a “super-Jupiter” is a sign of what’s to come as the telescope’s exoplanet observations ramp up.


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