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כתבות אחרונות מאתר 'Phys'
Phys

Liquid-assisted crystal growth cuts perovskite defects for efficient solar cells and LEDs‎

A research team led by professor Seong Sik Shin of the SKKU Advanced Institute of Nanotechnology (SAINT) at Sungkyunkwan University (SKKU), in international collaboration with the Korea Research Institute of Chemical Technology (KRICT), the University of California, San Diego, and Princeton University, has developed a next-generation perovskite semiconductor thin film with dramatically reduced defects. Using the same material platform, the researchers demonstrated both high-performance solar cells and LEDs.

01:04
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Phys

JWST tracks more than 100 magnified stellar events in the Dragon galaxy‎

Using the James Webb Space Telescope (JWST), a team of astronomers identified 104 magnified stellar events in a galaxy known as the Dragon, located around 6.5 billion light-years away. This discovery more than doubles the previous record of 44 such detections in the same galaxy. Because these kinds of events reveal some of the most luminous stars and likely the presence of dark matter, this study offers a rare look at the galaxy's stellar population along with a possible hint at the nature of dark matter.

22:03
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Phys

How space weather powers auroras in the sky and threatens power grids on the ground‎

An aurora is one of nature's most spectacular light shows: It looks like green or red curtains rippling across the night sky. When viewed from the ground, this colorful display might seem far away and disconnected from anything happening on Earth's surface.

22:03
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Phys

100 buses long: Scientists map one of the world's largest known coral colonies‎

A huge coral colony stretching more than 1.5 kilometers (0.93 miles) along the outer reef of the Cocos (Keeling) Islands has been identified by researchers, making it one of the largest known coral colonies ever recorded.

19:01
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Phys

New species of ground-dwelling bird, the largest of its kind, identified in same cave as Homo floresiensis‎

In 2009, researchers working in the Liang Bua cave on Flores Island came across a leg bone. The 190,000–120,000-year-old fossil was identified as a bird bone and set aside. Like many bird bones before it, it was overlooked and left to collect dust.

19:01
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Phys

Game theory helps SETI search for alien civilizations‎

The search for extraterrestrial intelligence (SETI) is mostly concerned with where to look for technosignatures from another civilization. Between 2012 and 2015, SETI's Project Phoenix targeted about 1,000 sun-like stars for signs of intelligent life. But where to look might not be as important as when to look, according to scientists at SETI.

19:01
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Phys

'Stupendously large' primordial black holes ruled out as a dark matter source‎

Primordial black holes are hypothetical objects that could have formed directly from dense clumps of matter in the very early universe. If they exist, their dramatic origins would set them apart from the black holes we see today, which form when massive stars collapse. Some theories suggest that "stupendously large" primordial black holes could account for a significant share of the universe's elusive dark matter.

17:30
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