Photometric Surveys and Variable stars
... Gamma Doradus stars • sp. type mid-late F, lum. class V, Pop I • P: 8h - 3d (close to P(rot)!) • sometimes multiperiodic • g-mode pulsators (n < 0) The gamma Doradus class is a new designation (early 1990’s). Before they were discovered, they were sometimes unknowingly used as comp stars! ...
... Gamma Doradus stars • sp. type mid-late F, lum. class V, Pop I • P: 8h - 3d (close to P(rot)!) • sometimes multiperiodic • g-mode pulsators (n < 0) The gamma Doradus class is a new designation (early 1990’s). Before they were discovered, they were sometimes unknowingly used as comp stars! ...
20 – N10/4/PHYSI/SP3/ENG/TZ0/XX Option E
... (iii) State why the method of parallax can only be used for stars at a distance of less than a few hundred parsecs from Earth. ...
... (iii) State why the method of parallax can only be used for stars at a distance of less than a few hundred parsecs from Earth. ...
Astronomy Exam #4
... 26. An O star is known to be eight times the temperature of the Sun and fivr times its radius. What is its luminosity? You may answer either in Watts or in units of solar luminosity. Note: the radius of the Sun is 696,000 km and the temperature of the Sun is 5,800 K. ...
... 26. An O star is known to be eight times the temperature of the Sun and fivr times its radius. What is its luminosity? You may answer either in Watts or in units of solar luminosity. Note: the radius of the Sun is 696,000 km and the temperature of the Sun is 5,800 K. ...
Stars, Galaxies & Universe
... Death of a Star • Stars use up their hydrogen and expand their atmosphere. • Stars that are less than 1.4 solar masses will shrink to a white dwarf. • Stars between 1.4 -3.0 solar masses will produce a supernova and leave a neutron star. • Stars more than 3.0 solar masses will produce a supernova a ...
... Death of a Star • Stars use up their hydrogen and expand their atmosphere. • Stars that are less than 1.4 solar masses will shrink to a white dwarf. • Stars between 1.4 -3.0 solar masses will produce a supernova and leave a neutron star. • Stars more than 3.0 solar masses will produce a supernova a ...
Images from the Las Cumbres Observatory Global Telescope
... white main sequence star and the companion, Sirius B, is a white dwarf that orbits the primary every 50 years. The distance between the two stars varies between 8.1 and 31.5 AU. The companion is not visible to the naked eye. Sirius A belongs to the spectral class A1V and Sirius B to DA2. Sirius A ha ...
... white main sequence star and the companion, Sirius B, is a white dwarf that orbits the primary every 50 years. The distance between the two stars varies between 8.1 and 31.5 AU. The companion is not visible to the naked eye. Sirius A belongs to the spectral class A1V and Sirius B to DA2. Sirius A ha ...
Life Cycle of a Star - Intervention Worksheet
... black holes when they die. After a large mass star explodes, a large amount of mass may remain. The gravity of the mass is so strong that gas is pulled inward, pulling more gas into a smaller and smaller space. Eventually, the gravity becomes so strong that nothing can escape, not even light. Sequen ...
... black holes when they die. After a large mass star explodes, a large amount of mass may remain. The gravity of the mass is so strong that gas is pulled inward, pulling more gas into a smaller and smaller space. Eventually, the gravity becomes so strong that nothing can escape, not even light. Sequen ...
Colour-magnitude diagram of an open cluster
... lifetimes than low-mass stars. The Sun will run out of fuel after about 1010 years; a star that is 10× more massive than the Sun will only live for about 10 million years! The point where the main sequence ends (the main sequence turn-off ) is thus a good indicator of the age of a star cluster. In ...
... lifetimes than low-mass stars. The Sun will run out of fuel after about 1010 years; a star that is 10× more massive than the Sun will only live for about 10 million years! The point where the main sequence ends (the main sequence turn-off ) is thus a good indicator of the age of a star cluster. In ...
Double Stars Discovered by IOTA Predicted Occultations July, 2010
... A double asteroid was initially considered, but because the measured magnitude drops did not agree with the predicted magnitude drop and because the single event measured magnitude drops agreed with the single occultation of a double star, the combination of all the chords precluded a double asteroi ...
... A double asteroid was initially considered, but because the measured magnitude drops did not agree with the predicted magnitude drop and because the single event measured magnitude drops agreed with the single occultation of a double star, the combination of all the chords precluded a double asteroi ...
Stars - Mrs. Tosh`s class
... Explain how stars at different stages in their life cycle appear on the H-R diagram. ...
... Explain how stars at different stages in their life cycle appear on the H-R diagram. ...
10438 starlight - The Described and Captioned Media Program
... Our knowledge of stars is the result of a complex interplay and flow of facts, ideas, and models among several areas of study: observational astronomy, mechanics, spectroscopy, radiation physics, nuclear physics, and theoretical physics. In this program, viewers examine how our basic knowledge abou ...
... Our knowledge of stars is the result of a complex interplay and flow of facts, ideas, and models among several areas of study: observational astronomy, mechanics, spectroscopy, radiation physics, nuclear physics, and theoretical physics. In this program, viewers examine how our basic knowledge abou ...
Absolute Magnitudes of Supernovae
... Figure 1: Six views of a distance galaxy with a supernova to the lower left of the galaxy. Notice the decreasing brightness and changing color of the supernova with time. (Hubble Space Telescope) ...
... Figure 1: Six views of a distance galaxy with a supernova to the lower left of the galaxy. Notice the decreasing brightness and changing color of the supernova with time. (Hubble Space Telescope) ...
Auriga (constellation)
Auriga is one of the 48 constellations listed by the 2nd-century astronomer Ptolemy and remains one of the 88 modern constellations. Located north of the celestial equator, its name is the Latin word for ""charioteer"", associating it with various mythological charioteers, including Erichthonius and Myrtilus. Auriga is most prominent during winter evenings in the Northern Hemisphere, along with the five other constellations that have stars in the Winter Hexagon asterism. Because of its northern declination, Auriga is only visible in its entirety as far as 34° south; for observers farther south it lies partially or fully below the horizon. A large constellation, with an area of 657 square degrees, it is half the size of the largest constellation, Hydra.Its brightest star, Capella, is an unusual multiple star system among the brightest stars in the night sky. Beta Aurigae is an interesting variable star in the constellation; Epsilon Aurigae, a nearby eclipsing binary with an unusually long period, has been studied intensively. Because of its position near the winter Milky Way, Auriga has many bright open clusters in its borders, including M36, M37, and M38, popular targets for amateur astronomers. In addition, it has one prominent nebula, the Flaming Star Nebula, associated with the variable star AE Aurigae.In Chinese mythology, Auriga's stars were incorporated into several constellations, including the celestial emperors' chariots, made up of the modern constellation's brightest stars. Auriga is home to the radiant for the Aurigids, Zeta Aurigids, Delta Aurigids, and the hypothesized Iota Aurigids.