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Solar Eclipses
A solar eclipse occurs when the Moon passes between Earth and the Sun, thereby obscuring the view of the Sun from a small part of Earth, totally or partially. Such an alignment occurs approximately every six months, during the eclipse season in its new moon phase, when the Moon's orbital plane is closest to the plane of Earth's orbit. In a total eclipse, the disk of the Sun is fully obscured by the Moon. In partial and annular eclipses, only part of the Sun is obscured. Unlike a lunar eclipse, which may be viewed from anywhere on the night side of Earth, a solar eclipse can only be viewed from a relatively small area of the world. As such, although total solar eclipses occur somewhere on Earth every 18 months on average, they recur at any given place only once every 360 to 410 years. If the Moon were in a perfectly circular orbit and in the same orbital plane as Earth, there would be total solar eclipses once a month, at every new moon. Instead, because the Moon's orbit is t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Solar Eclipse 1999 4
Solar may refer to: Astronomy * Of or relating to the Sun ** Solar telescope, a special purpose telescope used to observe the Sun ** A device that utilizes solar energy (e.g. "solar panels") ** Solar calendar, a calendar whose dates indicate the position of the Earth on its revolution around the Sun ** Solar eclipse, an eclipse of a sun in which it is obstructed by the moon ** Solar System, the planetary system made up by the Sun and the objects orbiting it * Solar Maximum Mission, a satellite * SOLAR (ISS), an observatory on International Space Station Music * Solar (composition), "Solar" (composition), attributed to Miles Davis * Solar (Red Garland album), ''Solar'' (Red Garland album), 1962 * Solar (Taeyang album), ''Solar'' (Taeyang album), 2010 * ''Solar'', a 2011 album by Rubik (band), Rubik * "Solar", a song by Northlane from ''Mesmer (album), Mesmer'', 2017 * "Solar", a song by Sault from ''Air (Sault album), Air'', 2022 * ”Solar”, a song by Stam1na from ''Taival ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Night
Night, or nighttime, is the period of darkness when the Sun is below the horizon. Sunlight illuminates one side of the Earth, leaving the other in darkness. The opposite of nighttime is daytime. Earth's rotation causes the appearance of sunrise and sunset. Moonlight, airglow, starlight, and light pollution dimly illuminate night. The duration of day, night, and twilight varies depending on the time of year and the latitude. Night on other celestial bodies is affected by their rotation and orbital periods. The planets Mercury and Venus have much longer nights than Earth. On Venus, night lasts about 58 Earth days. The Moon's rotation is tidally locked, rotating so that one of the sides of the Moon always faces Earth. Nightfall across portions of the near side of the Moon results in lunar phases visible from Earth. Organisms respond to the changes brought by nightfall: darkness, increased humidity, and lower temperatures. Their responses include direct reactions a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Magnitude Of An Eclipse
The magnitude of eclipse is the fraction of the angular diameter of a celestial body being eclipsed. This applies to all celestial eclipses. The magnitude of a partial or annular solar eclipse is always between 0.0 and 1.0, while the magnitude of a total solar eclipse is always greater than or equal to 1.0, and has a theoretically maximum value of around 1.12. This measure is strictly a ratio of diameters and should not be confused with the covered fraction of the apparent area (disk) of the eclipsed body. Neither should it be confused with the astronomical magnitude scale of apparent brightness. Effect of the magnitude on a solar eclipse The apparent sizes of the Moon and Sun are both approximately 0.5°, or 30', but both vary because the distance between Earth and Moon varies. (The distance between Earth and Sun also varies, but the effect is slight in comparison.) In an annular solar eclipse, the magnitude of the eclipse is the ratio between the apparent angular diamet ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ellipse
In mathematics, an ellipse is a plane curve surrounding two focus (geometry), focal points, such that for all points on the curve, the sum of the two distances to the focal points is a constant. It generalizes a circle, which is the special type of ellipse in which the two focal points are the same. The elongation of an ellipse is measured by its eccentricity (mathematics), eccentricity e, a number ranging from e = 0 (the Limiting case (mathematics), limiting case of a circle) to e = 1 (the limiting case of infinite elongation, no longer an ellipse but a parabola). An ellipse has a simple algebraic solution for its area, but for Perimeter of an ellipse, its perimeter (also known as circumference), Integral, integration is required to obtain an exact solution. The largest and smallest diameters of an ellipse, also known as its width and height, are typically denoted and . An ellipse has four extreme points: two ''Vertex (geometry), vertices'' at the endpoints of the major axis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Degree Of Arc
A degree (in full, a degree of arc, arc degree, or arcdegree), usually denoted by ° (the degree symbol), is a measurement of a plane angle in which one full rotation is 360 degrees. It is not an SI unit—the SI unit of angular measure is the radian—but it is mentioned in the SI brochure as an accepted unit. Because a full rotation equals 2 radians, one degree is equivalent to radians. History The original motivation for choosing the degree as a unit of rotations and angles is unknown. One theory states that it is related to the fact that 360 is approximately the number of days in a year. Ancient astronomers noticed that the sun, which follows through the ecliptic path over the course of the year, seems to advance in its path by approximately one degree each day. Some ancient calendars, such as the Persian calendar and the Babylonian calendar, used 360 days for a year. The use of a calendar with 360 days may be related to the use of sexagesimal numbers. Another theory ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Diameter
In geometry, a diameter of a circle is any straight line segment that passes through the centre of the circle and whose endpoints lie on the circle. It can also be defined as the longest Chord (geometry), chord of the circle. Both definitions are also valid for the diameter of a sphere. In more modern usage, the length d of a diameter is also called the diameter. In this sense one speaks of diameter rather than diameter (which refers to the line segment itself), because all diameters of a circle or sphere have the same length, this being twice the radius r. :d = 2r \qquad\text\qquad r = \frac. The word "diameter" is derived from (), "diameter of a circle", from (), "across, through" and (), "measure". It is often abbreviated \text, \text, d, or \varnothing. Constructions With straightedge and compass, a diameter of a given circle can be constructed as the perpendicular bisector of an arbitrary chord. Drawing two diameters in this way can be used to locate the center of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Solar Eclipse May 20,2012
Solar may refer to: Astronomy * Of or relating to the Sun ** Solar telescope, a special purpose telescope used to observe the Sun ** A device that utilizes solar energy (e.g. "solar panels") ** Solar calendar, a calendar whose dates indicate the position of the Earth on its revolution around the Sun ** Solar eclipse, an eclipse of a sun in which it is obstructed by the moon ** Solar System, the planetary system made up by the Sun and the objects orbiting it * Solar Maximum Mission, a satellite * SOLAR (ISS), an observatory on International Space Station Music * "Solar" (composition), attributed to Miles Davis * ''Solar'' (Red Garland album), 1962 * ''Solar'' (Taeyang album), 2010 * ''Solar'', a 2011 album by Rubik * "Solar", a song by Northlane from '' Mesmer'', 2017 * "Solar", a song by Sault from ''Air'', 2022 * ”Solar”, a song by Stam1na from '' Taival'', 2018 * SOLAR Records, a record label Geography * Solar (Spanish term), a type of urban site * Solar, Cou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eclipse Chasing
Eclipse chasing is the pursuit of observing solar eclipses when they occur around the Earth. Solar eclipses must occur at least twice and as often as five times a year across the Earth. Total eclipses may occur multiple times every few years. A person who chases eclipses is known as an umbraphile, meaning shadow lover. Umbraphiles often travel for eclipses and use various tools to help view the Sun including solar viewers also known as eclipse glasses, as well as telescopes. As of 2017, three New Yorkers, Glenn Schneider, Jay Pasachoff, and John Beattie have each seen 33 total solar eclipses, the current record. Donald Liebenberg, professor of astronomy at Clemson University in South Carolina has seen 26 traveling to Turkey, Zambia, China, the Cook Islands and others. History In the 19th century, Mabel Loomis Todd, an American editor and writer, and her husband David Peck Todd, a professor of astronomy at Amherst College, traveled around the world to view solar eclipses. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sungazing
Sungazing is the practice of intentionally looking directly at the sun, usually during sunrise or sunset. Proponents believe it can provide health benefits by connecting with the sun's energy, potentially leading to increased energy levels, improved mental clarity, and even spiritual awakening. However, medical professionals strongly advise against it due to the risk of severe eye damage. The human eye is very sensitive, and exposure to direct sunlight can lead to solar retinopathy, pterygium, cataracts, and potentially blindness. Studies have shown that even when viewing a solar eclipse the eye can still be exposed to harmful levels of ultraviolet radiation. Damage The damage to eyes from ultraviolet radiation can be serious and permanent due to damage to the retina. Wearing sunglasses can prevent some harm, depending on the UV rating. People who have had cataract surgery, received photodynamic therapy, or are under the effects of photosensitizing medications have an increased ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Omen
An omen (also called ''portent'') is a phenomenon that is believed to foretell the future, often signifying the advent of change. It was commonly believed in ancient history, and still believed by some today, that omens bring divine messages from the gods. These omens include natural phenomena, for example an eclipse, abnormal births of animals (especially humans) and behaviour of the sacrificial lamb on its way to the slaughter. Specialists, known as diviners, variously existed to interpret these omens. They would also use an artificial method, for example, a clay model of a sheep liver, to communicate with their gods in times of crisis. They would expect a binary answer, either yes or no, favourable or unfavourable. They did these to predict what would happen in the future and to take action to avoid disaster. Though the word ''omen'' is usually devoid of reference to the change's nature, hence being possibly either "good" or "bad", the term is more often used in a foreb ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Supernatural
Supernatural phenomena or entities are those beyond the Scientific law, laws of nature. The term is derived from Medieval Latin , from Latin 'above, beyond, outside of' + 'nature'. Although the corollary term "nature" has had multiple meanings since the ancient world, the term "supernatural" emerged in the Middle Ages and did not exist in the ancient world. The supernatural is featured in folklore and religious contexts, but can also feature as an explanation in more secular contexts, as in the cases of superstitions or belief in the paranormal. The term is attributed to non-physical entity, non-physical entities, such as angels, demons, gods and ghost, spirits. It also includes claimed abilities embodied in or provided by such beings, including Magic (supernatural), magic, telekinesis, levitation (paranormal), levitation, precognition and extrasensory perception. The supernatural is hypernymic to religion. Religions are standardized supernaturalist worldviews, or at least m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Natural Phenomena
A natural phenomenon is an observable event which is not man-made. Examples include: sunrise, weather, fog, thunder, tornadoes; biological processes, decomposition, germination; physical processes, wave propagation, erosion; tidal flow, and natural disasters such as electromagnetic pulses, volcanic eruptions, hurricanes and earthquakes. History Over many intervals of time, natural phenomena have been observed by a series of countless events as a feature created by nature. Physical phenomena The act of: * Freezing * Boiling * Gravity * Magnetism Gallery File:Crystal in VCGS furnace.jpg, Crystal in VCGS furnace File:Liquid hydrogen bubble chamber photograph of an anti-proton colliding with a proton.jpg, Liquid hydrogen bubble chamber photograph of an anti-proton colliding with a proton File:Static on the playground (48616367).jpg, Children notice an effect of static electricity Chemical phenomena * Oxidation ** Fire ** Rusting Biological phenomena * Metabolism ** ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
