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General Physics Jun 14, 2022

Can we time travel? A theoretical physicist provides some answers

Time travel makes regular appearances in popular culture, with innumerable time travel storylines in movies, television and literature. But it is a surprisingly old idea: one can argue that the Greek tragedy Oedipus Rex, ...

Astronomy Jun 10, 2022

NASA's NuSTAR mission celebrates ten years studying the X-ray universe

After a decade of observing some of the hottest, densest, and most energetic regions in our universe, this small but powerful space telescope still has more to see.

Astronomy Jun 3, 2022

Putting the theory of special relativity into practice, by counting galaxies

Scientists who study the cosmos have a favorite philosophy known as the "mediocrity principle," which, in essence, suggests that there's really nothing special about Earth, the sun or the Milky Way galaxy compared to the ...

Astronomy Jun 1, 2022

What the quest to image black holes could tell us about our universe

Not long ago, the idea of photographing a black hole was as quixotic as photographing a unicorn. Now, scientists have not one but two images of two different supermassive black holes—and they both look as magical as flaming ...

Astronomy May 24, 2022

AI reveals unsuspected math underlying search for exoplanets

Artificial intelligence (AI) algorithms trained on real astronomical observations now outperform astronomers in sifting through massive amounts of data to find new exploding stars, identify new types of galaxies and detect ...

Astronomy May 13, 2022

Black hole scientist: 'Wherever we look, we should see donuts'

Discovering something for the second time doesn't usually have scientists jump out of their seats with excitement. But that's exactly what happened in the case of Sgr A* (pronounced "sadge-ay-star"), the second black hole ...

Quantum Physics May 6, 2022

It takes three to tangle: Long-range quantum entanglement needs three-way interaction

A theoretical study shows that long-range entanglement can indeed survive at temperatures above absolute zero, if the correct conditions are met.

General Physics May 6, 2022

What is the multiverse, and does it really exist?

Whether you need a new villain or an old Spider-Man, your sci-fi movie will sound more scientifically respectable if you use the word "multiverse." The Marvel multiverse puts different versions of our universe "out there," ...

Astronomy May 5, 2022

Hubble reveals surviving companion star in aftermath of supernova

NASA's Hubble Space Telescope has uncovered a witness at the scene of a star's explosive death: a companion star previously hidden in the glare of its partner's supernova. The discovery is a first for a particular type of ...

Other May 4, 2022

The women scientists forgotten by history

French doctor and researcher Marthe Gautier, who died over the weekend, was one of a long line of women scientists who greatly contributed to scientific discovery only to see the credit go to their male colleagues.

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