In medieval and Renaissance society and culture, celestial events were not mere spectacles in the sky. Rather, they were omens, predictors of the future, and windows into the workings of the universe.
Astronomy
Apr 2, 2024
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Circularly conjugated compounds with 4n+2 pi-electrons are known as aromatic compounds. They are generally stable and are found in our surroundings. Conversely, anti-aromatic compounds with 4n pi-electrons have been conventionally ...
Analytical Chemistry
Jul 27, 2023
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Vinyl polymerization (polymerization of vinyl compounds) is a useful method for preparing sp3-carbon-based main-chain polymers including commodity plastics, where the polymer backbone is constructed from a two-carbon unit ...
Polymers
Sep 2, 2022
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NASA will stand down from commanding its Mars missions for the next few weeks while Earth and the Red Planet are on opposite sides of the Sun. This period, called Mars solar conjunction, happens every two years.
Planetary Sciences
Sep 28, 2021
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The solar system's two biggest planets, Jupiter and Saturn, came within planetary kissing range in Monday's evening sky, an intimacy that will not occur again until 2080.
Space Exploration
Dec 21, 2020
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Jupiter and Saturn will merge in the night sky Monday, appearing closer to one another than they have since Galileo's time in the 17th century.
Space Exploration
Dec 18, 2020
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Just after sunset on the evening of Dec. 21, Jupiter and Saturn will appear closer together in Earth's night sky than they have been since the Middle Ages, offering people the world over a celestial treat to ring in the winter ...
Space Exploration
Nov 20, 2020
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The daily chatter between antennas here on Earth and those on NASA spacecraft at Mars is about to get much quieter for a few weeks.
Space Exploration
Aug 24, 2019
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This month, movements of the planets will put Mars almost directly behind the sun, from Earth's perspective, causing curtailed communications between Earth and Mars.
Space Exploration
Jul 15, 2017
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Researchers at Aalborg University, in conjunction with Bang & Olufsen in Denmark, have developed a sound laboratory that can reproduce the acoustics of any environment from cars to concert halls. One goal is better design ...
Engineering
Oct 12, 2016
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Conjunctivitis (also called pink eye or madras eye) refers to inflammation of the conjunctiva (the outermost layer of the eye and the inner surface of the eyelids). It is most commonly due to an infection (usually viral, but sometimes bacterial) or an allergic reaction.
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