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Theta Centaurids
Theta Centaurids is a weak meteor shower that occurs from January 23 to March 12. It is only visible from the Southern Hemisphere. Basic information *Abbreviation: TCE *Speed: 60 km/s *Rating: Weak *Hourly rate: 4 *Peak Date: February 14 * Radiant: Alpha= 210 degrees, Delta= -40 degrees More information Theta Centaurids is the northernmost of several meteor showers. The radiant is located west of Lupus. Theta Centaurids is best seen at five o’clock in the morning and eleven o’clock at night. This shower occurs as little as one day after Alpha Centaurids The Alpha Centaurids are a meteor shower in the constellation Centaurus Centaurus is a bright constellation in the southern sky. One of the largest constellations, Centaurus was included among the 48 constellations listed by the 2nd-cent ..., a meteor shower around the same area. Another meteor shower nearby is the Omicron Centaurids shower. Theta Centaurids is considered a very fast meteor shower. Its rang ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Meteor Shower
A meteor shower is a celestial event in which a number of meteors are observed to radiate, or originate, from one point in the night sky. These meteors are caused by streams of cosmic debris called meteoroids entering Earth's atmosphere at extremely high speeds on parallel trajectories. Most meteors are smaller than a grain of sand, so almost all of them disintegrate and never hit the Earth's surface. Very intense or unusual meteor showers are known as meteor outbursts and meteor storms, which produce at least 1,000 meteors an hour, most notably from the Leonids. The Meteor Data Centre lists over 900 suspected meteor showers of which about 100 are well established. Several organizations point to viewing opportunities on the Internet. NASA maintains a daily map of active meteor showers. Historical developments A meteor shower in August 1583 was recorded in the Timbuktu manuscripts.Abraham, Curtis"Stars of the Sahara" ''New Scientist'', issue 2617,15 August 2007, page 39–41 In ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Theta Centaurids
Theta Centaurids is a weak meteor shower that occurs from January 23 to March 12. It is only visible from the Southern Hemisphere. Basic information *Abbreviation: TCE *Speed: 60 km/s *Rating: Weak *Hourly rate: 4 *Peak Date: February 14 * Radiant: Alpha= 210 degrees, Delta= -40 degrees More information Theta Centaurids is the northernmost of several meteor showers. The radiant is located west of Lupus. Theta Centaurids is best seen at five o’clock in the morning and eleven o’clock at night. This shower occurs as little as one day after Alpha Centaurids The Alpha Centaurids are a meteor shower in the constellation Centaurus Centaurus is a bright constellation in the southern sky. One of the largest constellations, Centaurus was included among the 48 constellations listed by the 2nd-cent ..., a meteor shower around the same area. Another meteor shower nearby is the Omicron Centaurids shower. Theta Centaurids is considered a very fast meteor shower. Its rang ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Radiant (meteor Shower)
The radiant or apparent radiant of a meteor shower is the celestial point in the sky from which (from the point of view of a terrestrial observer) the paths of meteors appear to originate. The Perseids, for example, are meteors which appear to come from a point within the constellation of Perseus. Meteor paths appear at random locations in the sky, but the apparent paths of two or more meteors from the same shower will converge at the radiant. The radiant is the vanishing point of the meteor paths, which are parallel lines in three-dimensional space, as seen from the perspective of the observer, who views a two-dimensional projection against the sky. The geometric effect is identical to crepuscular rays, where parallel sunbeams appear to converge. A meteor that does not point back to the known radiant for a given shower is known as a ''sporadic'' and is not considered part of that shower. Shower meteors may appear a short time before the radiant has risen in the observer's ea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Meteor Showers
Named meteor showers recur at approximately the same dates each year. They appear to radiate from a certain point in the sky, known as the radiant, and vary in the speed, frequency and brightness of the meteors. As of November 2019, there are 112 established meteor showers. Table of meteor showers Dates are given for 2022.https://www.amsmeteors.org/meteor-showers/2020-meteor-shower-list/ 2022 IMO list at amsmeteors.org The dates will vary from year to year due to the leap year cycle. This list includes showers with radiants in both the northern and southern hemispheres. There is some overlap, but generally showers whose radiants have positive declinations are best seen from the northern hemisphere, and those with negative declinations are best observed from the southern hemisphere. See also * Lists of astronomical objects Sources This list of meteor streams and peak activity times is based on data from the International Meteor Organization while most of the parent body a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lupus (constellation)
Lupus is a constellation of the mid- Southern Sky. Its name is Latin for wolf. Lupus was one of the 48 constellations listed by the 2nd-century astronomer Ptolemy, and it remains one of the 88 modern constellations but was long an asterism associated with the just westerly, larger constellation Centaurus. History and mythology In ancient times, the constellation was considered an asterism within Centaurus, and was considered to have been an arbitrary animal, killed, or about to be killed, on behalf of, or for, Centaurus. An alternative visualization, attested by Eratosthenes, saw this constellation as a wineskin held by Centaurus. It was not separated from Centaurus until Hipparchus of Bithynia named it ( meaning "beast") in the 2nd century BC. The Greek constellation is probably based on the Babylonian figure known as the Mad Dog (UR.IDIM). This was a strange hybrid creature that combined the head and torso of a man with the legs and tail of a lion (the cuneiform sign 'U ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alpha Centaurids
The Alpha Centaurids are a meteor shower in the constellation Centaurus Centaurus is a bright constellation in the southern sky. One of the largest constellations, Centaurus was included among the 48 constellations listed by the 2nd-century astronomer Ptolemy, and it remains one of the 88 modern constellations. ..., peaking in early February each year. The average magnitude is around 2.5, with a peak of about three meteors an hour. They have been observed since 1969, with a single possible recorded observation in 1938. There was a report of a viewing in 1988, but it was not real. References Further reading * Centaurus (constellation) February events">Centaurus_(constellation).html" ;"title="Centaurus (constellation)">Centaurus (constellation) February events Meteor showers {{Meteor showers ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Right Ascension
Right ascension (abbreviated RA; symbol ) is the angular distance of a particular point measured eastward along the celestial equator from the Sun at the March equinox to the ( hour circle of the) point in question above the earth. When paired with declination, these astronomical coordinates specify the location of a point on the celestial sphere in the equatorial coordinate system. An old term, ''right ascension'' ( la, ascensio recta), "''Ascensio recta'' Solis, stellæ, aut alterius cujusdam signi, est gradus æquatorus cum quo simul exoritur in sphæra recta"; roughly translated, "''Right ascension'' of the Sun, stars, or any other sign, is the degree of the equator that rises together in a right sphere" refers to the ''ascension'', or the point on the celestial equator that rises with any celestial object as seen from Earth's equator, where the celestial equator intersects the horizon at a right angle. It contrasts with ''oblique ascension'', the point on the celesti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Declination
In astronomy, declination (abbreviated dec; symbol ''δ'') is one of the two angles that locate a point on the celestial sphere in the equatorial coordinate system, the other being hour angle. Declination's angle is measured north or south of the celestial equator, along the hour circle passing through the point in question. The root of the word ''declination'' (Latin, ''declinatio'') means "a bending away" or "a bending down". It comes from the same root as the words ''incline'' ("bend foward") and ''recline'' ("bend backward"). In some 18th and 19th century astronomical texts, declination is given as ''North Pole Distance'' (N.P.D.), which is equivalent to 90 – (declination). For instance an object marked as declination −5 would have an N.P.D. of 95, and a declination of −90 (the south celestial pole) would have an N.P.D. of 180. Explanation Declination in astronomy is comparable to geographic latitude, projected onto the celestial sphere, and right ascension is l ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Right Ascension
Right ascension (abbreviated RA; symbol ) is the angular distance of a particular point measured eastward along the celestial equator from the Sun at the March equinox to the ( hour circle of the) point in question above the earth. When paired with declination, these astronomical coordinates specify the location of a point on the celestial sphere in the equatorial coordinate system. An old term, ''right ascension'' ( la, ascensio recta), "''Ascensio recta'' Solis, stellæ, aut alterius cujusdam signi, est gradus æquatorus cum quo simul exoritur in sphæra recta"; roughly translated, "''Right ascension'' of the Sun, stars, or any other sign, is the degree of the equator that rises together in a right sphere" refers to the ''ascension'', or the point on the celestial equator that rises with any celestial object as seen from Earth's equator, where the celestial equator intersects the horizon at a right angle. It contrasts with ''oblique ascension'', the point on the celesti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Meteor Showers
A meteor shower is a celestial event in which a number of meteors are observed to radiate, or originate, from one point in the night sky. These meteors are caused by streams of cosmic debris called meteoroids entering Earth's atmosphere at extremely high speeds on parallel trajectories. Most meteors are smaller than a grain of sand, so almost all of them disintegrate and never hit the Earth's surface. Very intense or unusual meteor showers are known as meteor outbursts and meteor storms, which produce at least 1,000 meteors an hour, most notably from the Leonids. The Meteor Data Centre lists over 900 suspected meteor showers of which about 100 are well established. Several organizations point to viewing opportunities on the Internet. NASA maintains a daily map of active meteor showers. Historical developments A meteor shower in August 1583 was recorded in the Timbuktu manuscripts.Abraham, Curtis"Stars of the Sahara" ''New Scientist'', issue 2617,15 August 2007, page 39–41 In ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
January Events
, partof = Revolutions of 1989, Singing Revolution, and Dissolution of the Soviet Union , image = , caption = A man with a Lithuanian flag in front of a Soviet tank, 13 January 1991 , date = 11–13 January 1991 , place = Lithuania , coordinates = , map_type = , latitude = , longitude = , map_size = , map_caption = , map_label = , territory = , result = Lithuanian victory * Soviet forces withdraw from the cities * Lithuanian statehood preserved , status = , combatant1 = * Lithuanian Riflemen's Union , combatant2 = * Soviet Army ** 76th Airborne DivisionLithuanians celebrat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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