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Inex
The inex is an eclipse cycle of 10,571.95 days (about 29 years minus 20 days). The cycle was first described in modern times by Crommelin in 1901, but was named by George van den Bergh who studied it in detail half a century later. It has been suggested that the cycle was known to Hipparchos. One inex after an eclipse of a particular saros series there will be an eclipse in the next saros series, unless the latter saros series has come to an end. It corresponds to: *358 lunations (synodic months) *388.50011 draconitic months *30.50011 eclipse years (61 eclipse seasons) *383.67351 anomalistic months. *8 eclipse sets The 30.5 eclipse years means that if there is a solar eclipse (or lunar eclipse), then after one inex a New Moon (resp. Full Moon) will take place at the opposite node of the orbit of the Moon, and under these circumstances another eclipse can occur. Unlike the saros, the inex is not close to an integer number of ''anomalistic months'' so successive eclipses are no ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eclipse Cycle
Eclipses may occur repeatedly, separated by certain intervals of time: these intervals are called eclipse cycles. The series of eclipses separated by a repeat of one of these intervals is called an eclipse series. Eclipse conditions Eclipses may occur when Earth and the Moon are aligned with the Sun, and the shadow of one body projected by the Sun falls on the other. So at new moon, when the Moon is in conjunction with the Sun, the Moon may pass in front of the Sun as viewed from a narrow region on the surface of Earth and cause a solar eclipse. At full moon, when the Moon is in opposition to the Sun, the Moon may pass through the shadow of Earth, and a lunar eclipse is visible from the night half of Earth. The conjunction and opposition of the Moon together have a special name: syzygy (Greek for "junction"), because of the importance of these lunar phases. An eclipse does not occur at every new or full moon, because the plane of the Moon's orbit around Earth is tilte ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Saros (astronomy)
The saros () is a period of exactly 223 synodic months, approximately 6585.3211 days, or 18 years, 10, 11, or 12 days (depending on the number of leap years), and 8 hours, that can be used to predict eclipses of the Sun and Moon. One saros period after an eclipse, the Sun, Earth, and Moon return to approximately the same relative geometry, a near straight line, and a nearly identical eclipse will occur, in what is referred to as an eclipse cycle. A sar is one half of a saros. A series of eclipses that are separated by one saros is called a ''saros series''. It corresponds to: *6,585.321347 solar days *18.029 years *223 synodic months *241.999 draconic months *18.999 eclipse years (38 eclipse seasons) *238.992 anomalistic months The 19 eclipse years means that if there is a solar eclipse (or lunar eclipse), then after one saros a new moon will take place at the same node of the orbit of the Moon, and under these circumstances another eclipse can occur. History The earliest ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
June 2029 Lunar Eclipse
A total lunar eclipse will take place on Tuesday, June 26, 2029. A dramatic total eclipse lasting 1 hour and 41 minutes 53 seconds will plunge the full Moon into deep darkness, as it passes right through the centre of the Earth's umbral shadow. While the visual effect of a total eclipse is variable, the Moon may be stained a deep orange or red color at maximum eclipse. This will be a great spectacle for everyone who sees it from most of the Americas and western Europe and Africa. The partial eclipse will last for 3 hours and 39 minutes 32 seconds in total. The moon will pass through the center of the Earth's shadow. Totality will last 101 minutes 53 seconds, the maximum duration for Saros series 130. With an umbral eclipse magnitude of 1.84362, this is the largest lunar eclipse of the 21st century. Gamma has a value of only 0.01240. Due to the Moon's relatively large size as seen from Earth and greater speed in its elliptical orbit, totality will not last over 106 minutes. This ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
August 1942 Lunar Eclipse
A total lunar eclipse took place on Wednesday, August 26, 1942. The moon passed through the center of the Earth's shadow. This is the 38th member of Lunar Saros 127. The previous event is the August 1924 lunar eclipse. The next event is the September 1960 lunar eclipse. Visibility Related lunar eclipses Inex series Saros series Lunar saros series 127, repeating every 18 years and 11 days, has a total of 72 lunar eclipse events including 54 umbral lunar eclipses (38 partial lunar eclipses and 16 total lunar eclipses). Solar Saros 134 interleaves with this lunar saros with an event occurring every 9 years 5 days alternating between each saros series. Tritos * Preceded: Lunar eclipse of September 26, 1931 * Followed: Lunar eclipse of July 26, 1953 Tzolkinex * Preceded: Lunar eclipse of July 16, 1935 * Followed: Lunar eclipse of October 7, 1949 See also *List of lunar eclipses and List of 21st-century lunar eclipses There will be 230 lunar eclipse ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Solar Eclipse Of June 21, 2020
An annular solar eclipse occurred on Sunday, June 21, 2020. An annular solar eclipse is a solar eclipse whose presentation looks like a ring, or annulus; it occurs when the Moon's apparent diameter is smaller than the sun's, blocking most, but not all, of the sun's light. In this instance, the moon's apparent diameter was 0.6% smaller than the sun's. An annular solar eclipse that occurred prior was on December 26, 2019. Path The path of this annular eclipse passed through parts of Central and Eastern Africa; southern Arabian Peninsula, including Yemen, Oman, and southern Saudi Arabia; parts of South Asia and the Himalayas, including southern Pakistan, northern India, and Nepal; parts of East Asia, including South China and Taiwan, and part of Micronesia, including Guam. A partial eclipse was visible throughout much of the rest of Africa, southeastern Europe, most of Asia, and in New Guinea and northern Australia just before sunset. In Europe, the partial eclipse was visible to pl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Saros Cycle
The saros () is a period of exactly 223 synodic months, approximately 6585.3211 days, or 18 years, 10, 11, or 12 days (depending on the number of leap years), and 8 hours, that can be used to predict eclipses of the Sun and Moon. One saros period after an eclipse, the Sun, Earth, and Moon return to approximately the same relative geometry, a near straight line, and a nearly identical eclipse will occur, in what is referred to as an eclipse cycle. A sar is one half of a saros. A series of eclipses that are separated by one saros is called a ''saros series''. It corresponds to: *6,585.321347 solar days *18.029 years *223 synodic months *241.999 draconic months *18.999 eclipse years (38 eclipse seasons) *238.992 anomalistic months The 19 eclipse years means that if there is a solar eclipse (or lunar eclipse), then after one saros a new moon will take place at the same node of the orbit of the Moon, and under these circumstances another eclipse can occur. History The earliest ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Saros Series
The saros () is a period of exactly 223 synodic months, approximately 6585.3211 days, or 18 years, 10, 11, or 12 days (depending on the number of leap years), and 8 hours, that can be used to predict eclipses of the Sun and Moon. One saros period after an eclipse, the Sun, Earth, and Moon return to approximately the same relative geometry, a near straight line, and a nearly identical eclipse will occur, in what is referred to as an eclipse cycle. A sar is one half of a saros. A series of eclipses that are separated by one saros is called a ''saros series''. It corresponds to: *6,585.321347 solar days *18.029 years *223 synodic months *241.999 draconic months *18.999 eclipse years (38 eclipse seasons) *238.992 anomalistic months The 19 eclipse years means that if there is a solar eclipse (or lunar eclipse), then after one saros a new moon will take place at the same node of the orbit of the Moon, and under these circumstances another eclipse can occur. History The earliest disco ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Solar Eclipse Of May 31, 2049
An annular solar eclipse will occur on Monday, May 31, 2049. A solar eclipse occurs when the Moon passes between Earth and the Sun, thereby totally or partly obscuring the image of the Sun for a viewer on Earth. An annular solar eclipse occurs when the Moon's apparent diameter The angular diameter, angular size, apparent diameter, or apparent size is an angular distance describing how large a sphere or circle appears from a given point of view. In the vision sciences, it is called the visual angle, and in optics, it is ... is smaller than the Sun's, blocking most of the Sun's light and causing the Sun to look like an annulus (ring). An annular eclipse appears as a partial eclipse over a region of the Earth thousands of kilometres wide. Images Animated path Related eclipses Solar eclipses 2047–2050 Saros 138 It is a part of Saros cycle 138, repeating every 18 years, 11 days, containing 70 events. The series started with partial solar eclipse on June 6, 1472. I ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Astronomical Year Numbering
Astronomical year numbering is based on AD/ CE year numbering, but follows normal decimal integer numbering more strictly. Thus, it has a year 0; the years before that are designated with negative numbers and the years after that are designated with positive numbers. Astronomers use the Julian calendar for years before 1582, including the year 0, and the Gregorian calendar for years after 1582, as exemplified by Jacques Cassini (1740),Jacques Cassini, Tables Astronomiques' (1740), Explication et Usage pp. 5 (PA5), 7 (PA7), Tables pp. 10 (RA1-PA10), 22 (RA1-PA22), 63 (RA1-PA63), 77 (RA1-PA77), 91 (RA1-PA91), 105 (RA1-PA105), 119 (RA1-PA119). Simon Newcomb (1898) and Fred Espenak (2007).Fred EspenakPhases of the Moon: −99 to 0 (100 to 1 BCE) ''NASA Eclipse web site'' The prefix AD and the suffixes CE, BC or BCE (Common Era, Before Christ or Before Common Era) are dropped. The year 1 BC/BCE is numbered 0, the year 2 BC is numbered −1, and in general the year ''n'' BC/BCE is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
May 2087 Lunar Eclipse
A total lunar eclipse will take place on May 17, 2087. The moon will pass through the center of the Earth's shadow. Visibility Related lunar eclipses Saros series Inex series Half-Saros cycle A lunar eclipse will be preceded and followed by solar eclipses by 9 years and 5.5 days (a half saros).Mathematical Astronomy Morsels, Jean Meeus, p.110, Chapter 18, ''The half-saros'' This lunar eclipse is related to two total solar eclipses of Solar Saros 139. See also *List of lunar eclipses and List of 21st-century lunar eclipses There will be 230 lunar eclipses in the 21st century (2001–2100): 87 penumbral, 58 partial and 85 total. Eclipses are listed in sets by lunar years, repeating every 12 months for each node. Ascending node eclipses are given a red background hi ... Notes External links * 2087-05 2087-05 2087 in science {{lunar-eclipse-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
June 2058 Lunar Eclipse
A total lunar eclipse will take place on June 6, 2058. The moon will pass through the center of the Earth's shadow. Visibility Related lunar eclipses Lunar year series Saros series Tritos series Inex series Half-Saros cycle A lunar eclipse will be preceded and followed by solar eclipses by 9 years and 5.5 days (a half saros).Mathematical Astronomy Morsels, Jean Meeus, p.110, Chapter 18, ''The half-saros'' This lunar eclipse is related to two annular solar eclipses of Solar Saros 138. See also *List of lunar eclipses and List of 21st-century lunar eclipses There will be 230 lunar eclipses in the 21st century (2001–2100): 87 penumbral, 58 partial and 85 total. Eclipses are listed in sets by lunar years, repeating every 12 months for each node. Ascending node eclipses are given a red background hi ... Notes External links * 2058-06 2058-06 2058 in science 2058-06 {{lunar-eclipse-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
George Van Den Bergh
George van den Bergh (25 April 1890 in Oss – 3 October 1966 in Oegstgeest) was a Dutch law professor and amateur astronomer. Van den Bergh was the son of Samuel van den Bergh, one of the founders of Unilever. His brother Sidney James and his nephew Maarten would follow his father in business life, while George pursued an academic career. He was a lawyer in Amsterdam, 1915–1936. From 1925–33 he was a member of the House of Representatives of the Netherlands. He was author of ''Aarde en wereld in ruimte en tijd: Een uiteenzetting voor iedereen'' (1935) which was translated into English in 1937 as ''The Universe in Space and Time'' (U.K. edition) and ''Astronomy for the Millions'' (U.S. edition). Etty Hillesum (''An Interrupted Life'') mentions that he was arrested and detained by the Nazis in 1941. He survived the war. During the 1950s he studied the longer eclipse cycles, allowing him to predict solar and lunar eclipses over a long time interval. This was publ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
