astrophysics

The Mega-Engineering of the James Webb Space Telescope: Beryllium Gold Mirrors, Kapton Sunshield, and the Optics Peering into Cosmic Dawn

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Explore the mega-engineering behind the James Webb Space Telescope. Learn how gold-coated beryllium mirrors, a 5-layer Kapton sunshield, and 7-Kelvin cryocoolers peer into cosmic dawn 1.5 million kilometers from Earth.

The Fastest Star in the Galaxy: The Discovery of S301 at 25,000 km/s and the Ultimate Test of Einstein Around Sagittarius A*

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Discover star S301, detected by the ESO racing at 25,000 km/s (8.5% of light speed) around supermassive black hole Sagittarius A*. Learn how its orbit unlocks the black hole’s spin and tests Einstein’s General Relativity.