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A quadruple transit of the moons of Saturn captured by Hubble Space Telescope.

Today's featured list: The moons of Saturn are numerous and diverse, ranging from tiny moonlets less than 1 kilometer (0.62 mi) across to the enormous Titan, which is larger than the planet Mercury. Saturn has sixty-two moons with confirmed orbits, fifty-three of which have names, and only thirteen of which have diameters larger than 50 kilometers (31 mi). Saturn has seven moons that are large enough to become spherical, and dense rings with complex orbital motions of their own.

Portrait of Elizabeth I

Today's featured topic: The BBC Sports Personality of the Year is an awards ceremony that takes place annually in December. Devised by Paul Fox in 1954, it originally consisted of one titular award. Several new awards have been introduced, and as of 2008, eight awards are presented, including the Team of the Year, Overseas Personality, Lifetime Achievement Award, Helen Rollason Award, the Coach Award, and the Newcomer Award.

Listen to
Spring, from The Four Seasons

Today's featured sound: The Four Seasons, a set of four violin concertos by Antonio Vivaldi. Composed in 1723,The Four Seasons is Vivaldi's best-known work, and is among the most popular pieces of Baroque music. The texture of each concerto is varied, each resembling its respective season. Performed by John Harrison and the Wichita State University Chamber Players.

Did you know...

Catharina Weiss
Catharina Weiss

In the news

Yahya Sinwar in 2011
Yahya Sinwar

On this day...

October 20

Pope Pius XII
Pope Pius XII
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House sparrow

The house sparrow (Passer domesticus) is a passerine bird of the sparrow family Passeridae. Originally native to Europe, the Mediterranean Basin and a large part of Asia, it is now found in most parts of the world and is the most widely distributed wild bird. It is closely associated with human habitation and resides in both urban and rural areas. The house sparrow is a small bird with a typical length of 16 cm (6.3 in) and a mass of 24–39.5 g (0.85–1.39 oz). Females and young birds are coloured pale brown and grey, and males have brighter black, white, and brown markings. It is sometimes considered a pest but is also sometimes kept as a pet or used as a food item. This male house sparrow was photographed in Prospect Park, New York City, United States.

Photograph credit: Rhododendrites

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