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astrophysics

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A video of the sun showing the eruption of a solar flare.
solar physics

Tiny Jets on the Sun Power the Colossal Solar Wind

By Theo Nicitopoulos
April 24, 2023
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A new analysis argues that ubiquitous eruptions in the sun’s corona explain the vast flow of charged particles seen streaming out through the solar system.

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.

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.

A drawing of cosmic rays approaching the sun and the sun emitting gamma rays.
astrophysics

Strange Solar Gamma Rays Discovered at Even Higher Energies

By Katie McCormick
February 27, 2023
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There appear to be too many gamma rays coming from the sun. New higher-energy measurements reveal that this excess continues for a bit, then disappears — a cutoff that could help clarify what’s going on.

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.

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.

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.


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