Friday, May 13, 2022

Black Hole Image Reveals Beast in Center of Milky Way

Math and Science News from Quanta Magazine
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ASTROPHYSICS | ALL TOPICS

 

Black Hole Image Reveals Beast in Center of Milky Way

By JONATHAN O'CALLAGHAN

In 2019, the Event Horizon Telescope released a historic image of a supermassive black hole in another galaxy. The follow-up — an image of Sagittarius A* — shows it shimmering in the heart of our own.

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ALGORITHMS

 

Powerful 'Machine Scientists' Distill the Laws of Physics From Raw Data

By CHARLIE WOOD

Researchers say we're on the cusp of "GoPro physics," where a camera can point at an event and an algorithm can identify the underlying physics equation.

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Related: 
How Close Are Computers to Automating
Mathematical Reasoning?

by Stephen Ornes (2020)

COMPUTATIONAL COMPLEXITY

 

Computer Scientists Prove That Certain Problems Are Truly Hard

By MORDECHAI RORVIG

Finding out whether a question is too difficult to ever solve efficiently depends on figuring out just how hard it is. Researchers have now shown how to do that for a major class of problems.

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Related: 
Which Computational Universe
Do We Live In?

by Erica Klarreich

EXPLAINERS

 

Why 'De-Extinction' Is Impossible (But Could Work Anyway)

By YASEMIN SAPLAKOGLU

Several projects are aiming to bring back mammoths and other species that have vanished from the planet. Whether that's technically possible is beside the point.

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Related: 
New Hybrid Species Remix
Old Genes Creatively

by Jonathan Lambert (2019)

QUANTA SCIENCE PODCAST

 

New Map of Meaning in the Brain Changes Ideas About Memory

Podcast hosted by SUSAN VALOT;
Story by JORDANA CEPELEWICZ

Researchers have mapped hundreds of semantic categories to the tiny bits of the cortex that represent them in our thoughts and perceptions. What they discovered might change our view of memory.

Listen to the podcast

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Around the Web

Error Correction Without Magnets
Physicists have achieved error correction on their spin qubits without using a magnetic field, reports Martijn Boerkamp for Physics World. This new zero-field technique eliminates the magnetic field itself as a source of error. The code was implemented on three qubits, which allowed the researchers to correct for either "bit-flips" or "phase-flips" but not both. In 2021 Katie McCormick wrote for Quanta about a 9-qubit code that corrects for both.

Bending Light to See New Earths
Scientists are designing a new telescope that will use the gravitational pull of the sun to bend and focus light from distant sources, reports Elizabeth Howell for Inverse. This "gravity telescope" would be used to hunt for Earth-like planets around other stars. Gravity telescopes have been used before. In 2017, Ashley Yeager wrote for Quanta about new observations of the universe's earliest galaxies aided by a "giant cosmic lens" of galaxies and dark matter in the foreground.
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