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Earthshine has a calculated maximum apparent magnitude of −3.69 as viewed from Earth. [3] This phenomenon is most visible from Earth at night (or astronomical twilight) a few days before or after the day of new moon, [5] when the lunar phase is a thin crescent. On these nights, the entire lunar disk is both directly and indirectly sunlit, and ...
In 2008, the organizers coordinated the week with Earth Hour. [2] 7 2009 April 20–26 25 April International Year of Astronomy (IYA 2009) In 2009, the United States Dark Sky Week becomes International Dark Sky Week [13] [14] 8 2010 13–14 April [15] [16] 9 2011 3 April The world's first International Dark Sky City was founded in Flagstaff, AZ ...
Sky brightness refers to the visual perception of the sky and how it scatters and diffuses light. The fact that the sky is not completely dark at night is easily visible. If light sources (e.g. the Moon and light pollution ) were removed from the night sky , only direct starlight would be visible.
Stargazing Live is a British live television programme on astronomy that was broadcast yearly on BBC Two over three nights every winter from 2011 to 2017. The series was primarily presented by scientist Brian Cox and comedian and amateur astronomer Dara Ó Briain with support from TV presenter and biochemist Liz Bonnin and astronomer Mark Thompson.
The Rose Center for Earth and Space is a part of the American Museum of Natural History in New York City. The Center's complete name is The Frederick Phineas and Sandra Priest Rose Center for Earth and Space. The main entrance is located on the northern side of the museum on 81st Street near Central Park West in Manhattan's Upper West Side.
The Sky at Night is a documentary television programme on astronomy produced by the BBC. The show had the same permanent presenter, Sir Patrick Moore , from its first monthly broadcast on 24 April 1957 until 7 January 2013.
EarthNow is a Seattle-based startup company aiming to blanket the Earth with live satellite video coverage, initially aiming to provide services to governments and large-enterprise customers. [ 1 ] The company was founded in 2017 [ 2 ] and has backers including Bill Gates , SoftBank , Intellectual Ventures , Airbus , and OneWeb founder Greg Wyler .
In astronomy, diurnal motion (from Latin diurnus 'daily', from Latin diēs 'day') is the apparent motion of celestial objects (e.g. the Sun and stars) around Earth, or more precisely around the two celestial poles, over the course of one day. It is caused by Earth's rotation around its axis, so almost every star appears to follow a circular arc ...