Jump to content

User:Hemanshu/edmainpage

From Wikipedia, the free encyclopedia

Welcome to Wikipedia, a free-content encyclopedia in many languages. In this English edition, started in January 2001, we are working on 6,900,762 articles. Learn how to edit pages, experiment in the sandbox, and visit our Community Portal to find out how you can edit any article right now.

September 20, 2004: Wikipedia passed 1 million articles in over 100 languages.

Today's featured article

Umbriel imaged by Voyager 2
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...)

Selected anniversaries

October 24: Simchat Torah begins at sunset (Jewish diaspora)

Bust of Qutuz
Bust of Qutuz
More anniversaries:

In the news

Yahya Sinwar in 2011
Yahya Sinwar

Did you know...

Wuhan trolleybus on route 1
Wuhan trolleybus on route 1

Wikipedia in other languages

Wikipedia's sister projects

Wikipedia is written by volunteer editors and hosted by the Wikimedia Foundation, a non-profit organization that also hosts a range of other volunteer projects:

If you find this encyclopedia or its sister projects useful, please consider making a donation.

All New: 5 10 15 20 25 30 35 40 Orphaned: 500 1001 1501