Significant people
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| Millennium: | 2nd millennium BC |
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The 1520s BC was a decade lasting from January 1, 1529 BC to December 31, 1520 BC.
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The 17th century BC was a century that lasted from 1700 BC to 1601 BC.
The 1630s BC was a decade lasting from January 1, 1639 BC to December 31, 1630 BC.
The 1690s BC was a decade lasting from January 1, 1699 BC to December 31, 1690 BC.
The 1550s BC was a decade lasting from January 1, 1559 BC to December 31, 1550 BC.
The 1490s BC was a decade lasting from January 1, 1499 BC to December 31, 1490 BC.
The 1480s BC was a decade lasting from January 1, 1489 BC to December 31, 1480 BC.
The 1400s BC is a decade which lasted from 1409 BC to 1400 BC.
The saros is a period of exactly 223 synodic months, approximately 6585.3211 days, or 18 years, 10, 11, or 12 days, 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.
The Antikythera mechanism is an Ancient Greek hand-powered orrery, described as the oldest example of an analogue computer used to predict astronomical positions and eclipses decades in advance. It could also be used to track the four-year cycle of athletic games which was similar to an Olympiad, the cycle of the ancient Olympic Games.
The inex is an eclipse cycle of 10,571.95 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.
A total solar eclipse occurred on March 29, 2006. 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. A total solar eclipse occurs when the Moon's apparent diameter is larger than the Sun's, blocking all direct sunlight, turning day into darkness. Totality occurs in a narrow path across Earth's surface, with the partial solar eclipse visible over a surrounding region thousands of kilometres wide. It was visible from a narrow corridor which traversed half the Earth. The magnitude, that is, the ratio between the apparent sizes of the Moon and that of the Sun, was 1.052, and it was part of Saros 139.
A partial lunar eclipse took place on 16 August 2008, the second of two lunar eclipses in 2008, with the first being a total eclipse on 20 February 2008. The next lunar eclipse was a penumbral eclipse occurring on 9 February 2009, while the next total lunar eclipse occurred on 21 December 2010.
A penumbral lunar eclipse occurred on 28 November 2012, the second of two lunar eclipses in 2012.
A total lunar eclipse took place on 4 April 2015. It is the former of two total lunar eclipses in 2015, and the third in a tetrad. Other eclipses in the tetrad are those of 15 April 2014, 8 October 2014, and 28 September 2015.
A total lunar eclipse occurred on 15–16 May 2022, the first of two total lunar eclipses in 2022. the event occurred near lunar perigee; as a result, this event was referred to some in media coverage as a "super flower blood moon" and elsewhere as a "super blood moon", a supermoon that coincides with a total lunar eclipse. The eclipse was the longest total lunar eclipse visible from nearly all of North America since 1989.
A penumbral lunar eclipse took place on 5 July 2020, the third of four lunar eclipses in 2020.
A penumbral lunar eclipse took place on Wednesday, February 21, 1951. This was 6.4 days after the Moon reached apogee.
An annular solar eclipse occurred on December 14, 1955. 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 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. Annularity was visible from French Equatorial Africa, Libya, Anglo-Egyptian Sudan including the capital city Khartoum, French Somaliland including the capital Djibouti City, British Somaliland including the capital city Hargeisa, the Trust Territory of Somaliland, the Maldives, Andaman and Nicobar Islands, Burma, Thailand including the capital city Bangkok, Cambodia, Laos, North Vietnam and South Vietnam, China, British Hong Kong, Taiwan, and Ryukyu Islands. It was the third central solar eclipse visible from Bangkok from 1948 to 1958, where it is rare for a large city to witness 4 central solar eclipses in just 9.945 years. This is the 20th member Solar Saros 141, and the last of first set of solar eclipses without a penumbral internal contact, the next event is the 1973 Dec 24 event, which is the first of 19 solar eclipses with a penumbral internal contact until 2298 Jul 09.
Saros cycle series 135 for solar eclipses occurs at the Moon's ascending node, repeating every 18 years, 11 days. Solar Saros 135 contains 71 events in which of 18 will be partial eclipses and 53 will be umbral eclipses. All eclipses in this series occurs at the Moon's ascending node.
Saros cycle series 114 for lunar eclipses occurs at the moon's ascending node, 18 years 11 and 1/3 days. It contains 71 member events, with 13 total eclipses, starting in 1458 and ending in 1674. Solar saros 121 interleaves with this lunar saros with an event occurring every 9 years 5 days alternating between each saros series.
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