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11:51 UTC
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Ganymede
Ganymede is a moon of Jupiter and the largest and most massive satellite in the Solar System. It is the largest Solar System object without a substantial atmosphere and also the only moon in the Solar System with a substantial magnetic field. Like Titan, Saturn's largest moon, it is larger than the planet Mercury but, due to its lower density, has somewhat less surface gravity than Mercury, Io, or the Moon. Ganymede is composed of silicate rock and water in approximately equal proportions. It is a fully differentiated body, with an iron-rich liquid core and an internal ocean. Ganymede orbits Jupiter in roughly seven days and is in a 1:2:4 orbital resonance with Europa and Io. This image, a composite of three photographs taken by the NASA space probe Juno during a flyby in 2021, depicts the northern hemisphere of Ganymede roughly centered around the prime meridian.Photograph credit: NASA / JPL-Caltech / SwRI / MSSS / Kevin M. Gill


Pomacanthus maculosus

Pomacanthus maculosus, commonly known as the yellowbar angelfish, is a species in the marine angelfish family, Pomacanthidae, found in the western Indian Ocean and, more recently, in the eastern Mediterranean Sea. It has a deep and compressed body with a small mouth that is equipped with small bristle-like teeth. The background colour of adults is brownish blue with each scale having a blue margin creating the impression that it is predominantly blue. There is an uneven, yellow bar close to the centre of the flanks with dark blue, vertically elongated spots towards the head. The species is occasionally collected for the aquarium trade and has also been recorded on sale as food in fish markets. This P. maculosus fish was photographed in Ras Muhammad National Park in the Red Sea off the coast of the Sinai Peninsula in Egypt.

Photograph credit: Diego Delso

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William Howard Taft

William Howard Taft (September 15, 1857 – March 8, 1930) was the 27th president of the United States, serving from 1909 to 1913, and the tenth chief justice of the United States, serving from 1921 to 1930, the only person to have held both offices. Taft was elected president in 1908, the chosen successor of Theodore Roosevelt, but was defeated for reelection in 1912 by Woodrow Wilson after Roosevelt split the Republican vote by running as a third-party candidate. In 1921, President Warren G. Harding appointed Taft to be chief justice, a position he held until a month before his death. This photograph was taken in 1908 by the Pach Brothers studio.

Photograph credit: Pach Brothers; restored by Adam Cuerden