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Episode 1075             Episode 1077
Episode 1076

Horologium (constellation)
Wed, 2020-Apr-15 00:17 UTC
Length - 2:30

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Welcome to featured Wiki of the Day where we read the summary of the featured Wikipedia article every day.

The featured article for Wednesday, 15 April 2020 is Horologium (constellation).

Horologium (Latin hōrologium, from Greek ὡρολόγιον, lit. 'an instrument for telling the hour') is a constellation of six faintly visible stars in the southern celestial hemisphere. It was first described by the French astronomer Nicolas-Louis de Lacaille in 1756 and visualized by him as a clock with a pendulum and a second hand. In 1922 the constellation was redefined by the International Astronomical Union (IAU) as a region of the celestial sphere containing Lacaille's stars, and has since been an IAU designated constellation. Horologium's associated region is wholly visible to observers south of 23°N.

The constellation's brightest star—and the only one brighter than an apparent magnitude of 4—is Alpha Horologii (at 3.85), an ageing orange giant star that has swollen to around 11 times the diameter of the Sun. The long-period variable-brightness star, R Horologii (4.7 to 14.3), has one of the largest variations in brightness known for stars in the night sky visible to the unaided eye. Four star systems in the constellation are known to have exoplanets; one—Gliese 1061—contains an exoplanet in its habitable zone.





This recording reflects the Wikipedia text as of 00:17 UTC on Wednesday, 15 April 2020.

For the full current version of the article, see Horologium (constellation) on Wikipedia.

This podcast is produced by Abulsme Productions based on Wikipedia content and is released under a Creative Commons Attribution-ShareAlike License.

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This has been Aditi. Thank you for listening to featured Wiki of the Day.

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