Daily Knowledge

"Well begun is half done."
[Aristotle]

Quote of the Day, from brainyquote.com (2026/08/28)

October 1912 issue, containing the first Tarzan story

The All-Story Magazine was a pulp magazine founded in 1905 and published by Frank Munsey. The editor was Robert H. Davis. Munsey merged it with The Cavalier, another pulp, in May 1914, and the title changed to All-Story Cavalier Weekly for a year. In 1920 it was merged with Munsey's Argosy; the combined magazine was retitled Argosy All-Story Weekly. Well-known contributors included mystery writer Mary Roberts Rinehart and the Western writer Max Brand. The most famous was Edgar Rice Burroughs, whose first sale, Under the Moons of Mars, appeared in 1912, starting his Barsoom series set on Mars. The same year, All-Story printed his Tarzan of the Apes (issue pictured), and more Tarzan stories followed, along with another Burroughs series, about Pellucidar, a land inside the Earth. The debut of Zorro, the vigilante, was in All-Story in 1919, in Johnston McCulley's The Curse of Capistrano. The magazine was merged in 1929 into another, which soon focused on love stories and continued until 1955. (Full article...)

Enceladus imaged by the Cassini orbiter

1640 – Bishops' Wars: Scottish Covenanter forces led by Alexander Leslie defeated the English army near Newburn, England.
1789 – With the first use of his 1.2-metre (3.9 ft) telescope, then the largest in the world, William Herschel discovered a new moon of Saturn, later named Enceladus (pictured).
1909 – The 1909 Monterrey hurricane dissipated; one of the deadliest Atlantic tropical cyclones on record, it killed an estimated 4,000 people throughout Mexico.
1963 – American civil-rights leader Martin Luther King Jr. delivered the speech "I Have a Dream" during the March on Washington, calling for civil and economic rights and an end to racism in the United States.
2022 – A mass shooting took place in Phoenix, Arizona, leaving three dead and five others injured.

Age of Earth: ~ 4.568 billion years
World Population: 7.3 billion (July 2015)
Continents: 7 (Asia, Africa, North America, South America, Antarctica, Europe, and Australia)
Mean Radius: 6371.0 km
Axial Tilt: 23,44°

Image Source: Wikipedia - License: Public Domain (thanks to NASA)

Our solar system consists of
1 star (Sun) and 8 planets (Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune).

1 AU (astronomical unit) is roughly the distance between Earth and the Sun (about 150 million kilometres).
The space probe Voyager 1 was launched by the NASA in 1977 and is meanwhile (autumn 2015) about 133 AU away from Earth.

Image Source: Wikipedia - License: CC BY-SA 3.0