Why Star Positions?
... need not touch on these again. Referring to ‘minutes of arc’ and ‘seconds of arc’ simply reminds us that we are dealing with angular measurements, rather than minutes or seconds of time. We will keep our description to angles measured in degrees, minutes, and seconds, and give some examples to try t ...
... need not touch on these again. Referring to ‘minutes of arc’ and ‘seconds of arc’ simply reminds us that we are dealing with angular measurements, rather than minutes or seconds of time. We will keep our description to angles measured in degrees, minutes, and seconds, and give some examples to try t ...
The Life And Times Of A Star
... 10,000 times weaker (because the surface is over 100 times farther from the center). The escape velocity from the sun’s surface is reduced by 10 times. The fastest moving gas atoms at the sun’s surface can now easily escape into space. ...
... 10,000 times weaker (because the surface is over 100 times farther from the center). The escape velocity from the sun’s surface is reduced by 10 times. The fastest moving gas atoms at the sun’s surface can now easily escape into space. ...
File - YEAR 11 EBSS PHYSICS DETAILED STUDIES
... about losses as light travelled through gasses or dust clouds. We can also determine the size of a star by its spectrum. To do this we need to know its Luminosity, the amount of energy given off by each unit area, and an accurate surface temperature. ...
... about losses as light travelled through gasses or dust clouds. We can also determine the size of a star by its spectrum. To do this we need to know its Luminosity, the amount of energy given off by each unit area, and an accurate surface temperature. ...
Astronomy Timeline
... 130 B.C. - Greek astronomer Hipparchus develops the first accurate star map and star catalogue, and a reliable method to predict solar eclipses 46 B.C. - Julius Caesar, after consulting the astronomer Sosigenes of Alexandria, introduces the Julian Calendar, a regular year of 365 days divided into 12 ...
... 130 B.C. - Greek astronomer Hipparchus develops the first accurate star map and star catalogue, and a reliable method to predict solar eclipses 46 B.C. - Julius Caesar, after consulting the astronomer Sosigenes of Alexandria, introduces the Julian Calendar, a regular year of 365 days divided into 12 ...
Constellations, Looking Far Away, and Stars/Stellar Evolution
... comparing. The O-stars are the most massive (60 times the mass of the sun) on the diagonal (called the main sequence) and the L stars are the least massive (barely 1/10 the mass of the Sun). Stars are born with a given mass and that determines how their lives go. Exploration should also help answer ...
... comparing. The O-stars are the most massive (60 times the mass of the sun) on the diagonal (called the main sequence) and the L stars are the least massive (barely 1/10 the mass of the Sun). Stars are born with a given mass and that determines how their lives go. Exploration should also help answer ...
10. The Lives of the Stars
... Stars are born inside giant clouds of cool gas and dust. Such a cloud may contain thousands of dense blobs of gas; some of these blobs collapse under their own weight. Gravitational compression heats the gas until thermonuclear reactions occur. When the production of nuclear energy matches the rate ...
... Stars are born inside giant clouds of cool gas and dust. Such a cloud may contain thousands of dense blobs of gas; some of these blobs collapse under their own weight. Gravitational compression heats the gas until thermonuclear reactions occur. When the production of nuclear energy matches the rate ...
Lesson 6 - Magnitudes of Stars
... Magnitudes are a way of assigning a number to a star so we know how bright it is Similar to how the Richter scale assigns a number to the strength of an earthquake Betelgeuse and Rigel, stars in Orion with apparent magnitudes 0.3 and 0.9 ...
... Magnitudes are a way of assigning a number to a star so we know how bright it is Similar to how the Richter scale assigns a number to the strength of an earthquake Betelgeuse and Rigel, stars in Orion with apparent magnitudes 0.3 and 0.9 ...
Hertzsprung-Russell Diagrams and Distance to Stars
... Norris Russell. Up until that time, it was naively believed that the brightness of a star was directly related to its temperature, or color. It was expected that intrinsically brighter stars would be hotter and therefore bluer, in much the same way a metal rod changes its color from red, to white, t ...
... Norris Russell. Up until that time, it was naively believed that the brightness of a star was directly related to its temperature, or color. It was expected that intrinsically brighter stars would be hotter and therefore bluer, in much the same way a metal rod changes its color from red, to white, t ...
The Stellar Cycle
... What holds the white dwarf from collapsing? • The resulting outward pressure which keeps the electrons apart is called electron degeneracy pressure – this is what balances the weight. • Only if more energy drives the electrons into higher energy states, can the density increase. • Adding mass can d ...
... What holds the white dwarf from collapsing? • The resulting outward pressure which keeps the electrons apart is called electron degeneracy pressure – this is what balances the weight. • Only if more energy drives the electrons into higher energy states, can the density increase. • Adding mass can d ...
The Big Dipper is a
... If your astrological sign is Aries, the Sun should be in the constellation Aries on your birthday. The dates, according to astrological tradition, during which the Sun is in the constellation Aries are: March 21 to April 20th. In which constellation is the Sun actually in, during this time period? a ...
... If your astrological sign is Aries, the Sun should be in the constellation Aries on your birthday. The dates, according to astrological tradition, during which the Sun is in the constellation Aries are: March 21 to April 20th. In which constellation is the Sun actually in, during this time period? a ...
Killer Skies
... explosion enables elements heavier than iron to form supernova explosions seed the created elements into space, for the next generation of stars and planets. Carl Sagan says it well. ...
... explosion enables elements heavier than iron to form supernova explosions seed the created elements into space, for the next generation of stars and planets. Carl Sagan says it well. ...
Astrology and Sex Appeal
... as Henry Kissinger remarked, is the ultimate aphrodisiac and where is it more likely to be found than in an imperious Leo? Venus and Jupiter are within three degrees in Mussolini’s chart - both in Cancer where Jupiter is exalted giving the conjunction something of a turbo charge. With Uranus at 20o ...
... as Henry Kissinger remarked, is the ultimate aphrodisiac and where is it more likely to be found than in an imperious Leo? Venus and Jupiter are within three degrees in Mussolini’s chart - both in Cancer where Jupiter is exalted giving the conjunction something of a turbo charge. With Uranus at 20o ...
Learning Objectives
... An object of known luminosity is called a standard candle. Most stars are not standard candles – their luminosities are not known and consequently their distances cannot be easily calculated. However, some special types of variable and exploding stars do have known, standard luminosities. Consequen ...
... An object of known luminosity is called a standard candle. Most stars are not standard candles – their luminosities are not known and consequently their distances cannot be easily calculated. However, some special types of variable and exploding stars do have known, standard luminosities. Consequen ...
Lecture6
... downward first – while R decreases, Ts increase is so small that L decreases (see Eqn(16), but then, moves toward left before going down again slightly – finally increase in Ts catches up with R decrease to keep L ~ constant, and then reverses the trend again in the end, before reaching MS. ...
... downward first – while R decreases, Ts increase is so small that L decreases (see Eqn(16), but then, moves toward left before going down again slightly – finally increase in Ts catches up with R decrease to keep L ~ constant, and then reverses the trend again in the end, before reaching MS. ...
Lecture8_2014_v2 - UCO/Lick Observatory
... • Are you comfortable or uncomfortable with the idea that they are so different from our own? ...
... • Are you comfortable or uncomfortable with the idea that they are so different from our own? ...
Perseid Watch at Weiser State Forest August 12
... (European Southern Observatory ESO1531) The chemical element lithium has been found for the first time in material ejected by a nova. Observations of Nova Centauri 2013 made using telescopes at ESO’s La Silla Observatory, and near Santiago in Chile, help to explain the mystery of why many young star ...
... (European Southern Observatory ESO1531) The chemical element lithium has been found for the first time in material ejected by a nova. Observations of Nova Centauri 2013 made using telescopes at ESO’s La Silla Observatory, and near Santiago in Chile, help to explain the mystery of why many young star ...
Grade Nine Planetarium script
... h) Cygnus is on the opposite side of Cepheus from Cassiopeia. If you start from the top of Cepheus’ pointy head and draw a line straight down through the middle of his neck (if he had one) and go along this line for another 1.5 fist widths, you come to Deneb, the bright star in Cygnus. 12) The previ ...
... h) Cygnus is on the opposite side of Cepheus from Cassiopeia. If you start from the top of Cepheus’ pointy head and draw a line straight down through the middle of his neck (if he had one) and go along this line for another 1.5 fist widths, you come to Deneb, the bright star in Cygnus. 12) The previ ...
Star of Bethlehem
In Christian tradition, the Star of Bethlehem, also called the Christmas Star, revealed the birth of Jesus to the Biblical Magi, and later led them to Bethlehem. The star appears only in the nativity story of the Gospel of Matthew, where astrologers from the east are inspired by the star to travel to Jerusalem. There they meet King Herod of Judea, and ask where the king of the Jews had been born. Herod, following a verse from the Book of Micah interpreted as a prophecy, directs them to Bethlehem, to the south of Jerusalem. The star leads them to Jesus' home in the town, where they worship him and give him gifts. The wise men are then given a divine warning not to return to Herod so they return home by a different route.Many Christians see the star as a miraculous sign to mark the birth of the Christ (or messiah). Some theologians claimed that the star fulfilled a prophecy, known as the Star Prophecy. Astronomers have made several attempts to link the star to unusual astronomical events, such as a conjunction of Jupiter and Saturn, a comet or a supernova.Many modern scholars do not consider the story to be describing a historical event but a pious fiction created by the author of the Gospel of Matthew.The subject is a favorite at planetarium shows during the Christmas season, although the Biblical account describes Jesus with a broader Greek word, which can mean either ""infant"" or ""child"" (paidon), rather than the more specific word for infant (brephos), possibly implying that some time has passed since the birth. The visit is traditionally celebrated on Epiphany (January 6) in Western Christianity.