solar month
31Solar variation — Solar variations are changes in the amount of solar radiation emitted by the Sun. There are periodic components to these variations, the principal one being the 11 year solar cycle (or sunspot cycle), as well as aperiodic fluctuations. Solar… …
32Solar energy — is the light and radiant heat from the Sun that powers Earth s climate and weather and sustains life. Since ancient times it has been harnessed for human use through a range of technologies. Solar radiation along with secondary solar resources… …
33Solar water disinfection — Solar water disinfection, also known as SODIS [ [http://www.sodis.ch sodis.ch] ] is a method of disinfecting water using only sunlight and plastic PET bottles. SODIS is a cheap and effective method for decentralized water treatment, usually… …
34Solar sail — Solar sails (also called light sails or photon sails, especially when they use light sources other than the Sun) are a proposed form of spacecraft propulsion using large membrane mirrors. Radiation pressure is about 10 5 Pa at Earth s distance… …
35Solar thermal energy — Solar thermal system for water heating in Santorini, Greece …
36Solar retinopathy — is damage to the eye s retina, particularly the macula, from prolonged exposure to solar radiation. It usually occurs due to staring at the sun or viewing a solar eclipse [Midwest Eye Care, P.C. [http://www.midwesteyecare.com/SubSection/index.php?… …
37Solar Wind (comic) — Solar Wind is a British small press comicbook. Edited by Cosmic Ray (a pseudonym for small press comics publisher Paul Scott), the comic is devoted to gentle parodies of British boys comics of the 1970s and 80s. Eight issues in all were produced… …
38Month — For the Egyptian hawk god, see Monthu. A month is a unit of time, used with calendars, which was first used and invented in Mesopotamia, as a natural period related to the motion of the Moon; month and Moon are cognates. The traditional concept… …
39Solar eclipse — A solar eclipse occurs when the Moon passes between the Sun and the Earth so that the Sun is wholly or partially obscured. This can only happen during a new moon, when the Sun and Moon are in conjunction as seen from the Earth. At least two and… …
40Solar chimney — This article refers to a device for ventilation. For the power generation technology, see Solar updraft tower. A solar chimney often referred to as a thermal chimney is a way of improving the natural ventilation of buildings by using convection… …
