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Artist's conception of Epsilon Eridani
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...)

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Saudade

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

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From Wikipedia, the free encyclopedia
Welcome to Wikipedia,
5,334,953 articles in English

From today's featured article

Artist's conception of Epsilon Eridani
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 Ordnance Factory Board Mine Protected Vehicle
An OFB MPV

In the news

Frank-Walter Steinmeier in 2014
Frank-Walter Steinmeier

On this day...

February 14: Valentine's Day

Salman Rushdie
Salman Rushdie
More anniversaries:

Today's featured picture

Saudade

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:


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