Umbriel imaged by Voyager 2

Umbriel is the third-largest moon of Uranus. It was discovered on October 24, 1851, by William Lassell. Named after a character in the 1712 poem The Rape of the Lock by Alexander Pope, Umbriel is composed mainly of ice with a substantial fraction of rock. It may be differentiated into a rocky core and an icy mantle. Its surface, the darkest among Uranian moons, appears to have been shaped mostly by impacts, but the presence of canyons suggests early endogenic processes. This shows Umbriel may have undergone an early endogenically driven resurfacing event that erased its older surface. Covered by numerous impact craters reaching 210 km (130 mi) in diameter, Umbriel is the second-most heavily cratered satellite of Uranus after Oberon. Like all moons of Uranus, Umbriel likely formed from an accretion disk that surrounded the planet just after its formation. The only close study of Umbriel was conducted in January 1986 by Voyager 2, which captured images of about 40 percent of its surface during the spacecraft's flyby of Uranus. (Full article...)

Japanese battleship Yamashiro

The Fusō-class battleships were a pair of dreadnoughts built for the Imperial Japanese Navy before and during World War I: Fusō was launched in 1914, and Yamashiro (pictured) in 1915. During the 1930s, both ships underwent a series of modernizations and reconstructions. This increased their armor, replaced and upgraded their machinery, and rebuilt their superstructures into a distinctive pagoda-mast style. Despite the expensive reconstructions, both vessels were considered obsolescent by the eve of World War II, and neither saw significant action in the early years of the war. In 1944 both underwent upgrades to their anti-aircraft suite before transferring to Singapore. Fusō and Yamashiro were the only two Japanese battleships at the Battle of Surigao Strait, the southernmost action of the Battle of Leyte Gulf, and both were lost in the early hours of 25 October 1944 to torpedoes and naval gunfire. Only ten crewmembers from each ship survived. (This article is part of a featured topic: Battleships of Japan.)

Katy Perry (born October 25, 1984) is an American singer, songwriter, and television personality. She released her debut album in 2001, then signed to Capitol Records in 2007. Perry rose to fame in 2008 with the release of the single "I Kissed a Girl". She has released seven studio albums, most recently 143 in September 2024. Perry has the second-most US diamond certified singles for any female artist (six). She has received various accolades, including a Billboard Spotlight Award, four Guinness World Records, five Billboard Music Awards, five American Music Awards, a Brit Award, and a Juno Award. Perry is one of the best-selling music artists of all time, having sold more than 143 million units worldwide. She made her film debut voicing Smurfette in The Smurfs in 2011, released a documentary film in 2012, and launched her own shoe line, Katy Perry Collections, in 2017. Perry served as a judge on American Idol between 2018 and 2024. (Full article...)