Ch13_Lecture - Chemistry at Winthrop University
... the main sequence • Generally, 90% of a group of stars will be on the main sequence; however, a few stars will be cool but very luminous (upper right part of H-R diagram), while others will be hot and dim (lower left part of H-R ...
... the main sequence • Generally, 90% of a group of stars will be on the main sequence; however, a few stars will be cool but very luminous (upper right part of H-R diagram), while others will be hot and dim (lower left part of H-R ...
1/20/09 301 Physics Chapter 12 The Family of Stars Triangulation
... • Given for Sirius Ls = 25L, Ts = 10,000 K, and for the Sun T= 6000 K, one finds Rs = 1.8R ...
... • Given for Sirius Ls = 25L, Ts = 10,000 K, and for the Sun T= 6000 K, one finds Rs = 1.8R ...
Deep Sky Catalogues, the New Uranometria and Other Stories
... If an object is entered as NGC/IC galaxy, the following kinds of errors can occur: a) The object is indeed a galaxy, but is plotted at a wrong place. At the correct position (the arrow in Fig. 1 points to it) the DSFG can give: another NGC/IC galaxy (which is often identical, e.g. NGC 3479 = NGC 350 ...
... If an object is entered as NGC/IC galaxy, the following kinds of errors can occur: a) The object is indeed a galaxy, but is plotted at a wrong place. At the correct position (the arrow in Fig. 1 points to it) the DSFG can give: another NGC/IC galaxy (which is often identical, e.g. NGC 3479 = NGC 350 ...
Photometry of star clusters with SalsaJ - Eu-Hou
... Photometry is generally used to generate light curves of objects such as variable stars and supernovae, where the interest is the variation of total light energy output by the system over time. It can also be used to discover exoplanets, by measuring the intensity of a stars light over a period of t ...
... Photometry is generally used to generate light curves of objects such as variable stars and supernovae, where the interest is the variation of total light energy output by the system over time. It can also be used to discover exoplanets, by measuring the intensity of a stars light over a period of t ...
SMMP_BISANA - Infinity and Beyond
... Despite the many mentions of the stars in Greek and early Roman texts, by far the most thorough star catalogue from ancient times belongs to the Roman Ptolemy of Alexandria, who grouped 1022 stars into 48 constellations during the 2nd century A.D. Although Ptolemy's Almagest does not include the co ...
... Despite the many mentions of the stars in Greek and early Roman texts, by far the most thorough star catalogue from ancient times belongs to the Roman Ptolemy of Alexandria, who grouped 1022 stars into 48 constellations during the 2nd century A.D. Although Ptolemy's Almagest does not include the co ...
HR diagram
... Spectral class is defined by the type, number and strength of spectral lines observed in a star’s optical spectrum. Spectral classes are coded by letter: O, B, A, F, G, K, M. Spectral class and color are defined by the star’s temperature. ...
... Spectral class is defined by the type, number and strength of spectral lines observed in a star’s optical spectrum. Spectral classes are coded by letter: O, B, A, F, G, K, M. Spectral class and color are defined by the star’s temperature. ...
Stars, Galaxies, and the Universe Section 1
... Stellar Motion Apparent Motion • The apparent motion of stars is the motion visible to the unaided eye. Apparent motion is caused by the movement of Earth. • The rotation of Earth causes the apparent motion of stars to be as though the stars are moving counterclockwise around the North Star. • Earth ...
... Stellar Motion Apparent Motion • The apparent motion of stars is the motion visible to the unaided eye. Apparent motion is caused by the movement of Earth. • The rotation of Earth causes the apparent motion of stars to be as though the stars are moving counterclockwise around the North Star. • Earth ...
Triangulation Trigonometric Parallax
... times larger than the Sun and are referred to as giants – Stars smaller than the giants are called dwarfs ...
... times larger than the Sun and are referred to as giants – Stars smaller than the giants are called dwarfs ...
Archaeology of the Milky Way - Max-Planck
... center of the Milky Way. “This finding can be explained by the fact that some stars don’t remain on their original orbit around the center, but are able to migrate inwards and outwards,” says Rix. New computer simulations support this scenario for the process of star migration. The Milky Way is a s ...
... center of the Milky Way. “This finding can be explained by the fact that some stars don’t remain on their original orbit around the center, but are able to migrate inwards and outwards,” says Rix. New computer simulations support this scenario for the process of star migration. The Milky Way is a s ...
151 - ESO
... she do? She started filling her eyes with tears. When Perseus persisted, questioning her again and again, she became afraid lest her unwillingness to talk might seem due to guilt. So she told him the name of her country, and her own name, and she also told him how her mother, a beautiful woman, had ...
... she do? She started filling her eyes with tears. When Perseus persisted, questioning her again and again, she became afraid lest her unwillingness to talk might seem due to guilt. So she told him the name of her country, and her own name, and she also told him how her mother, a beautiful woman, had ...
20 pm - Starmap
... many more details will be apparent. Using binoculars, preferably with a tripod, will considerably enhance your star gazing experience. Many deep sky objects like galaxies and clusters will be within reach. Jupiter satellites and Saturn’s rings will also be visible. A spectacular experience for begin ...
... many more details will be apparent. Using binoculars, preferably with a tripod, will considerably enhance your star gazing experience. Many deep sky objects like galaxies and clusters will be within reach. Jupiter satellites and Saturn’s rings will also be visible. A spectacular experience for begin ...
ph507lecnote06
... Because stellar colours and spectral types are roughly correlated, we may construct a plot of absolute magnitude versus colour - called a colour-magnitude diagram. The relative ease and convenience with which colour indices (such as B - V) may be determined for vast numbers of stars dictates the pop ...
... Because stellar colours and spectral types are roughly correlated, we may construct a plot of absolute magnitude versus colour - called a colour-magnitude diagram. The relative ease and convenience with which colour indices (such as B - V) may be determined for vast numbers of stars dictates the pop ...
Chapter 17
... B. they are all at the same distance. C. they are all in the field of view of the galaxy center. D. as a class, they have similar luminosities. 17. The "orbits" of the stars in our galaxy do not follow the laws of Kepler. We understand this to be due to: A. proportionally more mass distributed away ...
... B. they are all at the same distance. C. they are all in the field of view of the galaxy center. D. as a class, they have similar luminosities. 17. The "orbits" of the stars in our galaxy do not follow the laws of Kepler. We understand this to be due to: A. proportionally more mass distributed away ...
Sample Stellar Evolution TEST QUESTIONS
... 5. The region of the Sun just below the photosphere a. is undergoing thermonuclear fusion using the proton-proton chain. b. is undergoing thermonuclear fusion using the CNO cycle. c. is transporting energy to the photosphere by convection. d. is not in hydrostatic equilibrium. e. a and c above 6. Wh ...
... 5. The region of the Sun just below the photosphere a. is undergoing thermonuclear fusion using the proton-proton chain. b. is undergoing thermonuclear fusion using the CNO cycle. c. is transporting energy to the photosphere by convection. d. is not in hydrostatic equilibrium. e. a and c above 6. Wh ...
This Book of Hours calculation is a possible
... book of hours and is directly over the churches of Compagne les Bains and Les Sauzils. But more importantly it is over the snow capped Pic de Soularac in the Pyrenees, more about this mountain later. Porrima (due west) is the Goddess of childbirth and is represented by Chartres Cathedral in Carpenti ...
... book of hours and is directly over the churches of Compagne les Bains and Les Sauzils. But more importantly it is over the snow capped Pic de Soularac in the Pyrenees, more about this mountain later. Porrima (due west) is the Goddess of childbirth and is represented by Chartres Cathedral in Carpenti ...
PH607lec10
... Observed structure of the Milky Way's spiral arms As of 2005, the Milky Way is thought to comprise a large barred spiral galaxy of Hubble type SBbc (loosely wound barred spiral) with a total mass of about 1012 solar masses, comprising 200-400 billion stars. A BARRED SPIRAL: It was only in the 1980s ...
... Observed structure of the Milky Way's spiral arms As of 2005, the Milky Way is thought to comprise a large barred spiral galaxy of Hubble type SBbc (loosely wound barred spiral) with a total mass of about 1012 solar masses, comprising 200-400 billion stars. A BARRED SPIRAL: It was only in the 1980s ...
THE HR DIAGRAM
... Late in the nineteenth century, astronomers had tools that revealed a great deal about stars. By that time, advances in telescope design and photographic emulsions were becoming mature. They were able to take spectral images of stars which revealed their composition and th ...
... Late in the nineteenth century, astronomers had tools that revealed a great deal about stars. By that time, advances in telescope design and photographic emulsions were becoming mature. They were able to take spectral images of stars which revealed their composition and th ...
Chapter 12
... – For stars of a given temperature, the larger the radius, the larger the luminosity – Therefore, as one moves up the H-R diagram, a star’s radius must become bigger – On the other hand, for a given luminosity, the larger the radius, the smaller the temperature – Therefore, as one moves right on the ...
... – For stars of a given temperature, the larger the radius, the larger the luminosity – Therefore, as one moves up the H-R diagram, a star’s radius must become bigger – On the other hand, for a given luminosity, the larger the radius, the smaller the temperature – Therefore, as one moves right on the ...
Chapter 9 / Adobe Acrobat Document
... 1. A spiral galaxy is roundish but flat with a bulge in the centre. It has major and minor spiral arms that come from the centre. An elliptical galaxy is oval or cigar shaped with no visible arm structure. An irregular galaxy does not have a regular shape. 2. Galaxies form when gravity causes a larg ...
... 1. A spiral galaxy is roundish but flat with a bulge in the centre. It has major and minor spiral arms that come from the centre. An elliptical galaxy is oval or cigar shaped with no visible arm structure. An irregular galaxy does not have a regular shape. 2. Galaxies form when gravity causes a larg ...
M104: The Sombrero Galaxy
... This photogenic galaxy looks like a broad-brimmed Mexican hat floating in space. Appropriately called the Sombrero Galaxy, its catalogue name is Messier 104 (M104). Thick dust lanes make up the brim of the galaxy. The brim winds into the brilliant white crown, made up of a central bulge of older sta ...
... This photogenic galaxy looks like a broad-brimmed Mexican hat floating in space. Appropriately called the Sombrero Galaxy, its catalogue name is Messier 104 (M104). Thick dust lanes make up the brim of the galaxy. The brim winds into the brilliant white crown, made up of a central bulge of older sta ...
Lecture
... constellation of Perseus From the light curve of Algol, we can infer that the system contains two stars of very different surface temperature, orbiting in a slightly inclined plane. ...
... constellation of Perseus From the light curve of Algol, we can infer that the system contains two stars of very different surface temperature, orbiting in a slightly inclined plane. ...
Spectra of Star Clusters
... • How are stars classified into spectral types? • Stars are classified according to their spectra, with different spectral types generally corresponding to different temperatures. In order from hottest to coolest, the major spectral types are O, B, A, F, G, K, and M. These are subdivided into num ...
... • How are stars classified into spectral types? • Stars are classified according to their spectra, with different spectral types generally corresponding to different temperatures. In order from hottest to coolest, the major spectral types are O, B, A, F, G, K, and M. These are subdivided into num ...
M104: The Sombrero Galaxy
... This photogenic galaxy looks like a broad-brimmed Mexican hat floating in space. Appropriately called the Sombrero Galaxy, its catalogue name is Messier 104 (M104). Thick dust lanes make up the brim of the galaxy. The brim winds into the brilliant white crown, made up of a central bulge of older sta ...
... This photogenic galaxy looks like a broad-brimmed Mexican hat floating in space. Appropriately called the Sombrero Galaxy, its catalogue name is Messier 104 (M104). Thick dust lanes make up the brim of the galaxy. The brim winds into the brilliant white crown, made up of a central bulge of older sta ...
z - STScI
... after the Big Bang (to z ~ 5.6) – New stars appear to be forming at roughly a constant rate until very recently (1 < z < 5) – SCUBA may have detected a significant component of dust-hidden star formation at cosmological distances ...
... after the Big Bang (to z ~ 5.6) – New stars appear to be forming at roughly a constant rate until very recently (1 < z < 5) – SCUBA may have detected a significant component of dust-hidden star formation at cosmological distances ...
click here
... • Stars of given type of spectrum and the same colors have the same absolute magnitude (99.9%) • Stars have different apparent magnitudes depending on their distance. • Stars behind dust clouds look redder than they are intrinsically, so… m-M=5 log d1 –5+ A(l) (i.e., the star looks fainter) ...
... • Stars of given type of spectrum and the same colors have the same absolute magnitude (99.9%) • Stars have different apparent magnitudes depending on their distance. • Stars behind dust clouds look redder than they are intrinsically, so… m-M=5 log d1 –5+ A(l) (i.e., the star looks fainter) ...
Aries (constellation)
Aries is one of the constellations of the zodiac. It is located in the northern celestial hemisphere between Pisces to the west and Taurus to the east. The name Aries is Latin for ram, and its symbol is 20px (Unicode ♈), representing a ram's horns. It is one of the 48 constellations described by the 2nd century astronomer Ptolemy, and remains one of the 88 modern constellations. It is a mid-sized constellation, ranking 39th overall size, with an area of 441 square degrees (1.1% of the celestial sphere).Although Aries came to represent specifically the ram whose fleece became the Golden Fleece of Ancient Greek mythology, it has represented a ram since late Babylonian times. Before that, the stars of Aries formed a farmhand. Different cultures have incorporated the stars of Aries into different constellations including twin inspectors in China and a porpoise in the Marshall Islands. Aries is a relatively dim constellation, possessing only four bright stars: Hamal (Alpha Arietis, second magnitude), Sheratan (Beta Arietis, third magnitude), Mesarthim (Gamma Arietis, fourth magnitude), and 41 Arietis (also fourth magnitude). The few deep-sky objects within the constellation are quite faint and include several pairs of interacting galaxies. Several meteor showers appear to radiate from Aries, including the Daytime Arietids and the Epsilon Arietids.