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astrophysics

Latest Articles

Photo of Large Magellan Cloud rotating clockwise.
Abstractions blog

What Astronomers Are Learning From Gaia’s New Milky Way Map

By Natalie Wolchover
May 8, 2018
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A roundup of some of the most important discoveries gleaned so far from the Gaia space observatory’s new map of the galaxy.

Lede art for "A Radically Conservative Solution for Cosmology’s Biggest Mystery": This Hubble image shows RS Puppis, a type of variable star known as a Cepheid variable. As variable stars go, Cepheids have comparatively long periods— RS Puppis, for example, varies in brightness by almost a factor of five every 40 or so days. RS Puppis is unusual; this variable star is shrouded by thick, dark clouds of dust enabling a phenomenon known as a light echo to be shown with stunning clarity. These Hubble observations show the ethereal object embedded in its dusty environment, set against a dark sky filled with background galaxies.
Abstractions blog

A Radically Conservative Solution for Cosmology’s Biggest Mystery

By Ramin Skibba
May 1, 2018
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Two ways of measuring the universe’s expansion rate yield two conflicting answers. Many point to the possibility of new physics at work, but a new analysis argues that unseen errors could be to blame.

Lede art for "Troubled Times for Alternatives to Einstein’s Theory of Gravity"
astrophysics

Troubled Times for Alternatives to Einstein’s Theory of Gravity

By Katia Moskvitch
April 30, 2018
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New observations of extreme astrophysical systems have “brutally and pitilessly murdered” attempts to replace Einstein’s general theory of relativity.

Photo of mathematician Donald Richards sitting in a Pennsylvania State University classroom.
Q&A

A Revealer of Secrets in the Data of Life and the Universe

By Natalie Wolchover
April 11, 2018
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The statistician Donald Richards lives to uncover subtle patterns hiding in real-world data.

Illustration for first stars
cosmology

Whisper From the First Stars Sets Off Loud Dark Matter Debate

By Liz Kruesi
March 29, 2018
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A surprise discovery announced a month ago suggested that the early universe looked very different than previously believed. Initial theories that the discrepancy was due to dark matter have come under fire.

Photo of the cosmos by the multi-lensed Dragonfly telescope
Abstractions blog

A Victory for Dark Matter in a Galaxy Without Any

By Joshua Sokol
March 28, 2018
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Paradoxically, a small galaxy that seems to contain none of the invisible stuff known as “dark matter” may help prove that it exists.

Illustration for Extreme Radio Bursts
astrophysics

Astronomers Trace Radio Burst to Extreme Cosmic Neighborhood

By Katia Moskvitch
January 10, 2018
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A mysterious object that repeatedly bursts with ultra-powerful radio waves must live in an extreme environment — something like the one around a supermassive black hole.

Magellan Baade telescope and CMB illustration
astrophysics

Earliest Black Hole Gives Rare Glimpse of Ancient Universe

By Joshua Sokol
December 6, 2017
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It weighs as much as 780 million suns and helped to cast off the cosmic Dark Ages. But now that astronomers have found the earliest known black hole, they wonder: How could this giant have grown so big, so fast?

Plunge Into A (Virtual Reality) Black Hole
Multimedia

Plunge Into a (Virtual Reality) Black Hole

By Natalie Wolchover
December 4, 2017
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Join a fleet of robotic probes on a one-way virtual-reality trip into the abyss of a massive black hole.


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