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Astronomers propose 'SatHub' to address growing threat of satellite megaconstellations

Astronomers propose 'SatHub' to address growing threat of satellite megaconstellations
space.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from space.com Daily Mail and Mail on Sunday newspapers.

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"Disturbing" --The Existence of Gargantuan Galaxies at Dawn of the Universe (Weekend Feature)

The anatomy of an enigma: a team of astronomers using the Large Binocular Telescope Observatory (LBT) atop Mount Graham in southeastern Arizona collected 17 hours’ worth of light from the abnormally massive elliptical galaxy dubbed C1-23152 (image above). The young galaxy is 12 billion light years away and defies conventional models of its origins as it must have accumulated its enormous mass within 1.8 billion years after the big bang, less than 13% of the present age of the universe. Most elliptical galaxies, such as C1-23152 at the center of a galaxy cluster, take many billions of years to reach their massive sizes. Hence the enduring mystery of how and why these monster objects exist in the early universe. ....

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Using Optical Metrology for Large Optics in Telescopes

Using Optical Metrology for Large Optics in Telescopes
Sponsored by 4D TechnologyJan 7 2021
The quantification of large optics demands metrology systems that operate in the context of turbulence, vibration and additional challenges.
Figure 1.
Measurement of large optics, such as this 8-meter primary mirror for the Large Binocular Telescope Observatory, requires metrology systems that can function despite vibration, turbulence and other challenges. (Courtesy R. Bertram and LBTO). Image Credit: 4D Technology
Introduction
The demand for meter-scale optical components has quickly grown in recent years, driven by an increase in satellite-based and terrestrial astronomy, and security and defense applications.
Laser interferometry is utilized across the manufacturing of large optics to validate adherence to stringent design requirements. ‘Dynamic interferometry’ has more recently been utilized for the vibration-resistant quantification of ....

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Massive waves of lava on Jupiter's Moon Io seen in exceptionally detailed map of lava lake

Massive waves of lava on Jupiterâs Moon Io seen in exceptionally detailed map of lava lake
Massive waves of lava on Jupiterâs Moon Io seen in exceptionally detailed map of lava lake
Researchers At University Of California (UC) Berkeley Took Advantage Of A Rare Orbital Alignment Between Io And Europa, The Two Of Jupiterâs Moons And Obtained An Exceptionally Detailed Map Of The Largest Lava Lake On Lo.
News Nation Bureau | Edited By : Bindiya Bhatt
| Updated on: 12 May 2017, 04:28:08 PM
Los Angeles:
Two giant waves of lava have been detected by the scientists on Jupiter’s Volcanic Moon lo, which is solar system’s most volcanically active celestial body. The huge waves were seen sweeping across the largest lava lake on lo. ....

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