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Wednesday, July 18, 2018

Speaking of Science: Over the moons

Speaking of Science
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The shadow of the Jovian moon Ganymede in the center of the stormy Great Red Spot. (NASA/ESA/AFP/Getty Images)

The number of Jupiter's moons is up to 79 and counting, astronomers announced this week. One of them has a strange orbit — the satellite travels against the flow of its neighboring moons. For that reason headlines have described the moon as an oddity, oddball and a weirdo.

The odd moon already has a name: Valetudo, who in Roman mythology was a goddess of personal health and one of Jupiter's many descendants. Astronomer and moon-finder Scott Sheppard told Vox that the name was a tribute to his girlfriend, who is, he said, "very cleanly."

For a goddess of cleanliness, Valetudo has a relatively muddled origin. In one depiction on an early Roman coin, she was the translation of the Greek goddess Hygieia into the Roman pantheon. But she shared that coin with Salus, another goddess of hygiene and well-being, who later took on Hygieia's characteristics.

Also, as one reader pointed out, in Portuguese "vale tudo" means "anything goes." It's also come to mean a chaotic Brazilian martial art. (A 1997 Los Angeles Times article, on the origin of mixed martial arts, described vale tudo as "no-holds-barred tournaments" popular in Japan and Brazil.) The violent connotation is fitting, too — because this Jovian moon orbits against the grain, Valetudo could possibly smash into its neighbors.

— Ben

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ESO — Supersharp Images from New VLT Adaptive Optics — Photo Release eso1824

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European
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ESO News
18 July 2018

ESO's Very Large Telescope (VLT) has achieved first light with a new adaptive optics mode called laser tomography — and has captured remarkably sharp test images of the planet Neptune, star clusters and other objects. The pioneering MUSE instrument in Narrow-Field Mode, working with the GALACSI adaptive optics module, can now use this new technique to correct for turbulence at different altitudes in the atmosphere. It is now possible to capture images from the ground at visible wavelengths that are sharper than those from the NASA/ESA Hubble Space Telescope. The combination of exquisite image sharpness and the spectroscopic capabilities of MUSE will enable astronomers to study the properties of astronomical objects in much greater detail than was possible before.

The release, images and videos are available on:
https://www.eso.org/public/news/eso1824/

Kind regards,
The ESO Education and Public Outreach Department
18 July 2018




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Pinpointing the Source — Paolo Padovani talks about the first discovery of a distant source of high energy neutrinos

Interview with: Paolo Padovani

12 July 2018: In the ice of Antarctica, a detector went off. It found a neutrino — a tiny, nearly massless particle. Observatories were notified and scientists began monitoring the area. They soon ...

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