Mysterious Neptune Dark Spot detected from Earth for the first time

There are four telescopic images of the planet Neptune side-by-side. The rightmost one is an almost-featureless cyan disc with a faint dark spot to the upper-right. The other three, coloured in blue, green and red, show higher contrast views of dark and bright spots, as well as bands crossing the planet diagonally.

Using ESO’s Very Large Telescope (VLT), astronomers have observed a large dark spot in Neptune’s atmosphere, with an unexpected smaller bright spot adjacent to it. This is the first time a dark spot on the planet has ever been observed with a telescope on Earth. These occasional features in the blue background of Neptune’s atmosphere are a mystery to astronomers, and the new results provide further clues as to their nature and origin.

Large spots are common features in the atmospheres of giant planets, the most famous being Jupiter’s Great Red Spot. On Neptune, a dark spot was first discovered by NASA’s Voyager 2 in 1989, before disappearing a few years later...

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New findings show how the Brain prepares to make Choices during Decision-Making

New findings show how the brain prepares for making choices during decision-making
Region highlighted = approximate location of the orbitofrontal cortex. Credit: PaulWicks, Wikimedia

Neuroscientists and psychologists have been trying for decades to better understand how humans make decisions, in the hope to devise more effective interventions to promote healthy and beneficial lifestyle choices. Two brain regions that have been linked to decision-making are the orbitofrontal cortex (OFC) and the anterior cingulate cortex (ACC).

Researchers at University of California, Berkeley (UC Berkeley), have been conducting extensive research focusing on these two areas of the brain and exploring their involvement in decision-making...

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Brain-computer interface enables woman with Severe Paralysis to speak through Digital Avatar

Brain-computer interface enables woman with severe paralysis to speak through digital avatar
Multimodal speech decoding in a participant with vocal-tract paralysis. Credit: Nature (2023). DOI: 10.1038/s41586-023-06443-4

Researchers at UC San Francisco and UC Berkeley have developed a brain-computer interface (BCI) that has enabled a woman with severe paralysis from a brainstem stroke to speak through a digital avatar.

It is the first time that either speech or facial expressions have been synthesized from brain signals. The system can also decode these signals into text at nearly 80 words per minute, a vast improvement over commercially available technology.

Edward Chang, MD, chair of neurological surgery at UCSF, who has worked on the technology, known as a brain computer interface, or BCI, for more than a decade, hopes this latest research breakthrough, appearing Aug...

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European Astronomers Detect New Component of Radio Halo in a Nearby Galaxy Cluster

European astronomers detect new component of radio halo in a nearby galaxy cluster
Composite RGB image of Abell 2142: radio (GMRT, 323 MHz) in red, optical (DSS-2, red filter) in green, and X-rays (XMM-Newton) in blue. Credit: Bruno et al., 2023.

Using the LOw Frequency ARray (LOFAR), astronomers from the University of Bologna, Italy and elsewhere, have conducted radio observations of the nearby galaxy cluster Abell 2142. In result, they detected a new component of the cluster’s giant radio halo. The finding was presented in a paper published August 15 on the pre-print server arXiv.

Galaxy clusters contain up to thousands of galaxies bound together by gravity. They are the largest known gravitationally bound structures in the universe, and could serve as excellent laboratories for studying galaxy evolution and cosmology.

Radio halos are enormous regions of diff...

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