Sky-High 2013 - Irish Astronomical Society
... eyes. We may say they have the same angular diameter. In this case it is about half a degree (½°). Degrees are further divided into 60 arcminutes (60') with each arcminute made up of 60 arcseconds (60"). The scale allows us to measure angles in the sky or apparent size of a celestial object. For exa ...
... eyes. We may say they have the same angular diameter. In this case it is about half a degree (½°). Degrees are further divided into 60 arcminutes (60') with each arcminute made up of 60 arcseconds (60"). The scale allows us to measure angles in the sky or apparent size of a celestial object. For exa ...
Science Grade 08 Unit 11 Exemplar Lesson 02: Classifying Stars
... This unit bundles student expectations that address components and characteristics of the universe. Students learn that stars and galaxies are part of the universe and how they can be classified by their characteristics. Prior to this unit, in Grade 8, students studied the effects resulting from cyc ...
... This unit bundles student expectations that address components and characteristics of the universe. Students learn that stars and galaxies are part of the universe and how they can be classified by their characteristics. Prior to this unit, in Grade 8, students studied the effects resulting from cyc ...
Characteristics of Our Galaxy
... but it is also to study other galaxies as well. While the study of the Milky Way Galaxy seems like a specific task, to truly explain its past, present, and future, and to truly understand its essence, requires one to address nearly everything but the question of multiple universes. While this is too ...
... but it is also to study other galaxies as well. While the study of the Milky Way Galaxy seems like a specific task, to truly explain its past, present, and future, and to truly understand its essence, requires one to address nearly everything but the question of multiple universes. While this is too ...
The Classification of Galaxies By Daniel Underwood Contents The
... matter spiralling out from the bulging centre of the galaxy. There are two types: barred spirals (SB) and non-barred (SA), although if distinction between the two happens to be difficult then “SAB” is used for denotation. A barred spiral is a spiral type (pictured on the right) but with a bar-like f ...
... matter spiralling out from the bulging centre of the galaxy. There are two types: barred spirals (SB) and non-barred (SA), although if distinction between the two happens to be difficult then “SAB” is used for denotation. A barred spiral is a spiral type (pictured on the right) but with a bar-like f ...
An introduction to photometry and photometric measurements Henry
... travel in straight lines at the speed of light. To motivate the following mathematical definitions, imagine you are looking at the Sun. The "brightness" of the Sun appears to be about the same over most of the Sun's surface, which looks like a nearly uniform disk even though it is a sphere. This mea ...
... travel in straight lines at the speed of light. To motivate the following mathematical definitions, imagine you are looking at the Sun. The "brightness" of the Sun appears to be about the same over most of the Sun's surface, which looks like a nearly uniform disk even though it is a sphere. This mea ...
The Physical Properties of Normal A Stars
... I give the name, spectral type, Teff, log g, log Fe/H, log Si/log Sr, v sin i, and . My “model” was that stars rotating sufficiently fast have normal abundances all over their surfaces. When the rotation decreases below some critical value, the poles begin to show peculiar abundances. These regions ...
... I give the name, spectral type, Teff, log g, log Fe/H, log Si/log Sr, v sin i, and . My “model” was that stars rotating sufficiently fast have normal abundances all over their surfaces. When the rotation decreases below some critical value, the poles begin to show peculiar abundances. These regions ...
Manual - TUM
... In this project, you will observe three star clusters. A list of possible target objects, together with their coordinates and parameters, is given in table 1. Select one cluster from each group. Cluster names are given with both ‘M’ and ‘NGC’ prefixes, these denote the names of the objects in the Me ...
... In this project, you will observe three star clusters. A list of possible target objects, together with their coordinates and parameters, is given in table 1. Select one cluster from each group. Cluster names are given with both ‘M’ and ‘NGC’ prefixes, these denote the names of the objects in the Me ...
Is Draco II one of the faintest dwarf galaxies? First study from Keck
... For a cold stellar system like Dra II, it is particularly important to assess the level of systematics on the measured velocity uncertainties. DEIMOS is known to yield a small level of systematics that cannot be entirely explained from properly tracking the sources of noise in the spectra. These sys ...
... For a cold stellar system like Dra II, it is particularly important to assess the level of systematics on the measured velocity uncertainties. DEIMOS is known to yield a small level of systematics that cannot be entirely explained from properly tracking the sources of noise in the spectra. These sys ...
Properties of Stars - Montana State University Extended University
... electromagnetic radiation chapter) is usually not as accurate as using the spectral lines? 8. What are the 7 basic spectral types in order of temperature (hottest to coldest)? 9. If our Sun has a surface temperature of 5840 K, how many times hotter than the Sun is the hottest O-type star? How many t ...
... electromagnetic radiation chapter) is usually not as accurate as using the spectral lines? 8. What are the 7 basic spectral types in order of temperature (hottest to coldest)? 9. If our Sun has a surface temperature of 5840 K, how many times hotter than the Sun is the hottest O-type star? How many t ...
File - Mr. Pelton Science
... of pulsation between 1 and 100 days. (luminosity as much as doubles) ...
... of pulsation between 1 and 100 days. (luminosity as much as doubles) ...
Sky Watcher - Boise Astronomical Society
... Zubenelgenubi. A pair of binoculars, if held steady, shows that it’s actually two stars. It’s possible that those with good eyesight can see Zubenelgenubi as two stars without optical aid. May 15 – 21 Do you want to learn how to identify the constellation of Scorpius the Scorpion? The moon passes cl ...
... Zubenelgenubi. A pair of binoculars, if held steady, shows that it’s actually two stars. It’s possible that those with good eyesight can see Zubenelgenubi as two stars without optical aid. May 15 – 21 Do you want to learn how to identify the constellation of Scorpius the Scorpion? The moon passes cl ...
Star-S_Teacher_Guide - The University of Texas at Dallas
... with fusion. Before this century, the accepted view was that the Sun, and therefore the stars, shines because of a chemical process such as fire. If the Sun were a coal furnace, an idea from the last century, then it would run out of fuel in only a few thousand years. We know from meteorites, howeve ...
... with fusion. Before this century, the accepted view was that the Sun, and therefore the stars, shines because of a chemical process such as fire. If the Sun were a coal furnace, an idea from the last century, then it would run out of fuel in only a few thousand years. We know from meteorites, howeve ...
Galaxies
... Classifying Galaxies • Spiral galaxies are denoted by “S”, and barred spirals by “SB”. Letters “a”, “b”, “c” denote how tightly the spiral arms are wound, with “a” being most tightly wound. The Andromeda Galaxy is an Sb. • Elliptical galaxies are denoted by “E”, with a number from 0-7 indicating ho ...
... Classifying Galaxies • Spiral galaxies are denoted by “S”, and barred spirals by “SB”. Letters “a”, “b”, “c” denote how tightly the spiral arms are wound, with “a” being most tightly wound. The Andromeda Galaxy is an Sb. • Elliptical galaxies are denoted by “E”, with a number from 0-7 indicating ho ...
Exploration of the Milky Way and Nearby galaxies
... Many potentially interesting stars are too faint (V > 13) for current 8 -10m tel Relevant absorption lines are weak, High precision, high spectral resolution data (R ~ 50000, SNR ~ 100) Long exposure time, ( HE 1327-2326: with VLT/UVES, exp time ~ 18 hrs) ...
... Many potentially interesting stars are too faint (V > 13) for current 8 -10m tel Relevant absorption lines are weak, High precision, high spectral resolution data (R ~ 50000, SNR ~ 100) Long exposure time, ( HE 1327-2326: with VLT/UVES, exp time ~ 18 hrs) ...
PPS
... colours as O, B, A, F, G and M in decreasing order of the temperature. O stars, at one extreme of the classification, are blue-white and show features due to ionized helium in their spectra; G stars, which are much cooler and orange-yellow in colour, show strong lines associated with ionized calcium ...
... colours as O, B, A, F, G and M in decreasing order of the temperature. O stars, at one extreme of the classification, are blue-white and show features due to ionized helium in their spectra; G stars, which are much cooler and orange-yellow in colour, show strong lines associated with ionized calcium ...
Chapter 19 Stars Galaxies and the Universe
... A star enters the first stage of its life cycle as a ball of gas and dust called a protostar. Gravity pulls the gas and dust together. As the ball becomes denser, it gets hotter. Eventually, the gas becomes so hot that it begins to react. These reactions produce energy, which keeps the new star from ...
... A star enters the first stage of its life cycle as a ball of gas and dust called a protostar. Gravity pulls the gas and dust together. As the ball becomes denser, it gets hotter. Eventually, the gas becomes so hot that it begins to react. These reactions produce energy, which keeps the new star from ...
Next Generation Sunshine State Standards Chapter 24
... sizes, temperatures, and distances, so their apparent brightnesses vary widely. Apparent Magnitude Stars have been classified according to their apparent brightness since at least the second century BC, when Hipparchus placed about 850 of them into six categories based on his ability to see differen ...
... sizes, temperatures, and distances, so their apparent brightnesses vary widely. Apparent Magnitude Stars have been classified according to their apparent brightness since at least the second century BC, when Hipparchus placed about 850 of them into six categories based on his ability to see differen ...
Beers_First_Stars_NIC_School
... Milky Way stars. Here we report on an analysis of a very metal-poor star, SDSS J001820.5−093939.2, which possesses elemental-abundance ratios that differ significantly from any previously known star. This star exhibits low [α-element/Fe] ratios and large contrasts between the abundances of odd and e ...
... Milky Way stars. Here we report on an analysis of a very metal-poor star, SDSS J001820.5−093939.2, which possesses elemental-abundance ratios that differ significantly from any previously known star. This star exhibits low [α-element/Fe] ratios and large contrasts between the abundances of odd and e ...
Cassiopeia Kelly Pearce
... series measuring between about 8,000 and 9,500 light years away (Ibid). The cluster is loose and is considered to contain varying amounts of objects, with the average observed about 70 in total (Ibid). Within the field of view from Earth, M103 appears to contain an object that is not part of the sam ...
... series measuring between about 8,000 and 9,500 light years away (Ibid). The cluster is loose and is considered to contain varying amounts of objects, with the average observed about 70 in total (Ibid). Within the field of view from Earth, M103 appears to contain an object that is not part of the sam ...
Astronomy 114 - Department of Astronomy
... Magnitude scale Greek astronomer Hipparchus divided stars into six classes or magnitudes (2nd century BC) 1st magnitude is brightest, 6th magnitude is faintest Sensitivity of human eye is logarithmic Magnitude difference of 1 corresponds log(1000) 3 to −2.5 log(F1 /F2 ) ...
... Magnitude scale Greek astronomer Hipparchus divided stars into six classes or magnitudes (2nd century BC) 1st magnitude is brightest, 6th magnitude is faintest Sensitivity of human eye is logarithmic Magnitude difference of 1 corresponds log(1000) 3 to −2.5 log(F1 /F2 ) ...
File
... the monster whose gaze turned people into stone. When Perseus decapitated her. It was tamed by the hero whose name was Bellerophon, the son of the Corinthian king Glaucus and the grandson of Sisyphus. The hero helped the Goddess Athena. In Greek mythology, he is best known for slaying the Chimera, a ...
... the monster whose gaze turned people into stone. When Perseus decapitated her. It was tamed by the hero whose name was Bellerophon, the son of the Corinthian king Glaucus and the grandson of Sisyphus. The hero helped the Goddess Athena. In Greek mythology, he is best known for slaying the Chimera, a ...
PH607lec12
... Though many astronomers agree that hierarchical formation seems to be occurring, there are still some wrinkles to the theory. For example, the very most massive galaxies don't seem to be growing at as high a rate as middle-mass galaxies. When astronomers look at the brightest galaxies now compared t ...
... Though many astronomers agree that hierarchical formation seems to be occurring, there are still some wrinkles to the theory. For example, the very most massive galaxies don't seem to be growing at as high a rate as middle-mass galaxies. When astronomers look at the brightest galaxies now compared t ...
presentation source
... Seyfert galaxy NGC 1275 is actually two galaxies in collision. The HST image (right) shows about 50 small, bright, young globular clusters formed as a result of the collision. NGC 1275 is also a strong source of X rays and radio waves ...
... Seyfert galaxy NGC 1275 is actually two galaxies in collision. The HST image (right) shows about 50 small, bright, young globular clusters formed as a result of the collision. NGC 1275 is also a strong source of X rays and radio waves ...
Stellar Evolution
... • higher temperature allows new nuclear reactions to start that are very slow at the ~15 million K temperature maintained by hydrogen fusion Star leaves the main sequence, becomes a red giant! ASTR 1120: Fall 2005 ...
... • higher temperature allows new nuclear reactions to start that are very slow at the ~15 million K temperature maintained by hydrogen fusion Star leaves the main sequence, becomes a red giant! ASTR 1120: Fall 2005 ...
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.