From Wikipedia, the free encyclopedia
From today's featured article
Artist's conception
Epsilon Eridani is a star in the constellation of Eridanus . Viewable from most of Earth's surface along a declination 9.46° south of the celestial equator , it is 10.5 light-years away and has an apparent magnitude of 3.73. It is the third-closest individual star or star system visible to the unaided eye. Estimated at less than a billion years old, the young star has a higher level of magnetic activity than the present-day Sun, with a stellar wind 30 times as strong. Epsilon Eridani is smaller and less massive than the Sun, with a greater proportion of hydrogen and helium . It is a main-sequence star of spectral class K2, which means that energy generated at the core through nuclear fusion of hydrogen is emitted from the surface at a temperature of about 5,000 K , giving it an orange hue. Observations for more than twenty years have yielded evidence of a giant planet orbiting the star, making it one of the nearest systems with a candidate exoplanet . The detection of this planet, Epsilon Eridani b , was announced by Bruce Campbell, Gordon Walker and Stephenson Yang in 1987. (Full article... )
Did you know...
An OFB MPV
In the news
Frank-Walter Steinmeier
On this day...
Today's featured picture
Saudade , an oil on canvas painting completed in 1899 by José Ferraz de Almeida Júnior . The Portuguese word saudade refers to a deep emotional state of nostalgic or profound melancholic longing for a beloved, and often connotes a repressed knowledge that the object of longing might never return. Once described as "the love that remains" after someone is gone, saudade now refers to a sense that someone or something that should be present is missing.
Painting: José Ferraz de Almeida Júnior
Other areas of Wikipedia
Community portal – Bulletin board, projects, resources and activities covering a wide range of Wikipedia areas.
Help desk – Ask questions about using Wikipedia.
Local embassy – For Wikipedia-related communication in languages other than English.
Reference desk – Serving as virtual librarians, Wikipedia volunteers tackle your questions on a wide range of subjects.
Site news – Announcements, updates, articles and press releases on Wikipedia and the Wikimedia Foundation.
Village pump – For discussions about Wikipedia itself, including areas for technical issues and policies.
Wikipedia's sister projects
Wikipedia is hosted by the Wikimedia Foundation , a non-profit organization that also hosts a range of other projects :
Wikipedia languages
This Wikipedia is written in English . Started in 2001 (2001 ) , it currently contains 5,334,953 articles.
Many other Wikipedias are available; some of the largest are listed below.
More than 1,000,000 articles:
More than 250,000 articles:
More than 50,000 articles: