"Sunshine" redirects here. For other uses, see Sunshine (disambiguation).
The Sun, as seen from low Earth orbit overlooking the International Space Station. This sunlight is not filtered by the lower atmosphere, which blocks much of the solar spectrum.
Sunlight shining upon two different sides of the U.S. state of New Jersey. Sunrise on the Jersey Shore at Spring Lake, Monmouth County (above), and sunset on the Shore at Sunset Beach, Cape May County (below). Both are filtered through high stratus clouds.
Sunrise over the Gulf of Mexico and Florida. Taken on 20 October 1968 from Apollo 7.
Sunlight is a portion of the electromagnetic radiation given off by the Sun, in particular infrared, visible, and ultraviolet light. On Earth, sunlight is scattered and filtered through Earth's atmosphere as daylight when the Sun is above the horizon. When direct solar radiation is not blocked by clouds, it is experienced as sunshine, a combination of bright light and radiant heat (Atmospheric). When blocked by clouds or reflected off other objects, sunlight is diffused. Sources estimate a global average of between 164 watts to 340 watts[1] per square meter over a 24-hour day;[2] this figure is estimated by NASA to be about a quarter of Earth's average total solar irradiance.
The ultraviolet radiation in sunlight has both positive and negative health effects, as it is both a requisite for vitamin D3 synthesis and a mutagen.
Sunlight takes about 8.3 minutes to reach Earth from the surface of the Sun.[3] A photon starting at the center of the Sun and changing direction every time it encounters a charged particle would take between 10,000 and 170,000 years to get to the surface.[4]
Sunlight is a key factor in photosynthesis, the process used by plants and other autotrophic organisms to convert light energy, normally from the Sun, into chemical energy that can be used to synthesize carbohydrates and fuel the organisms' activities.
Daylighting is the natural lighting of interior spaces by admitting sunlight.
Solar irradiance is the solar energy available from sunlight.
^"Climate and Earth's Energy Budget". earthobservatory.nasa.gov. 14 January 2009. Retrieved 2022-01-27.
^"Basics of Solar Energy". Archived from the original on 2016-11-28. Retrieved 2016-12-06.
^Bell Burnell, S. Jocelyn (2004). An Introduction to the Sun and Stars (illustrated ed.). Cambridge University Press. p. 56. ISBN 9780521546225. Extract of page 56
^"The 8-minute travel time to Earth by sunlight hides a thousand-year journey that actually began in the core". SunEarthDay.NASA.gov. NASA. Archived from the original on 2012-01-22. Retrieved 2012-02-12.
Sunlight is a portion of the electromagnetic radiation given off by the Sun, in particular infrared, visible, and ultraviolet light. On Earth, sunlight...
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with three sister foundations: Sunlight Giving, Acton Family Giving and Solidarity Giving. The couple started Sunlight Giving in 2014, a family foundation...
In the Sunlight is a 1915 American silent short drama film directed by Thomas Ricketts starring David Lythgoe, Vivian Rich, and Harry von Meter. As reported...
just below the horizon. Strictly speaking, alpenglow refers to indirect sunlight reflected or diffracted by the atmosphere after sunset or before sunrise...
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