A) Polaris B) Betelgeuse C) Procyon B D) Sirius 1. Which star has a
... the same luminosity as the star Aldebaran approximately the same temperature as the Rigel. Algol is best classified as a A) main sequence star B) red giant star C) white dwarf star D) red dwarf star 60. Two stars of the same color are plotted on an H-R diagram. Star A is more luminous than star B. W ...
... the same luminosity as the star Aldebaran approximately the same temperature as the Rigel. Algol is best classified as a A) main sequence star B) red giant star C) white dwarf star D) red dwarf star 60. Two stars of the same color are plotted on an H-R diagram. Star A is more luminous than star B. W ...
UCAC4 is a compiled, all-sky star catalog covering mainly the 8 to
... • 3 = secondary peak found on each side of primary • 4 = case 1 after successful double fit (small separ. blended image) • 5 = case 2 after successful double fit (most likely real double) • 6 = case 3 after successful double fit (brighter secondary picked) Caution: often a dsf= 1 or 2 image is paire ...
... • 3 = secondary peak found on each side of primary • 4 = case 1 after successful double fit (small separ. blended image) • 5 = case 2 after successful double fit (most likely real double) • 6 = case 3 after successful double fit (brighter secondary picked) Caution: often a dsf= 1 or 2 image is paire ...
Lab 7
... Introduction: By looking at an apparently flat background of stars at night or at a star chart printed on a page, we often forget about the three-dimensional nature of the universe. In this exercise, you will construct (with welding rods and Styrofoam balls) a model of nearby space including many of ...
... Introduction: By looking at an apparently flat background of stars at night or at a star chart printed on a page, we often forget about the three-dimensional nature of the universe. In this exercise, you will construct (with welding rods and Styrofoam balls) a model of nearby space including many of ...
Astro-MilkyWay
... 5. What fundamental principle did Shapley use to calibrate the period-luminosity relationship for Cepheid variable stars? a. Light intensity falls off with the inverse square of distance. b. Stars that appear brighter are on average closer to Earth. c. Large pulsating objects have longer periods tha ...
... 5. What fundamental principle did Shapley use to calibrate the period-luminosity relationship for Cepheid variable stars? a. Light intensity falls off with the inverse square of distance. b. Stars that appear brighter are on average closer to Earth. c. Large pulsating objects have longer periods tha ...
PowerPoint - Louisiana State University
... Contemporary with Roman sculptor From Ptolemy’s Almagest From Aratus’ Phaenomena From Eudoxus’ Phaenomena Assyrian observer who was source for Eudoxus and MUL.APIN ...
... Contemporary with Roman sculptor From Ptolemy’s Almagest From Aratus’ Phaenomena From Eudoxus’ Phaenomena Assyrian observer who was source for Eudoxus and MUL.APIN ...
Chapter 15
... 5. What fundamental principle did Shapley use to calibrate the period-luminosity relationship for Cepheid variable stars? a. Light intensity falls off with the inverse square of distance. b. Stars that appear brighter are on average closer to Earth. c. Large pulsating objects have longer periods tha ...
... 5. What fundamental principle did Shapley use to calibrate the period-luminosity relationship for Cepheid variable stars? a. Light intensity falls off with the inverse square of distance. b. Stars that appear brighter are on average closer to Earth. c. Large pulsating objects have longer periods tha ...
main sequence stars of a open cluster
... 5. Discussion: Print out the CM diagram and discuss your result. Q.1. Find the main sequence from the printed-out CM diagram. Enclose the main sequence by line with a width as narrow as possible. Q.2. What are the characteristics of the main-sequence stars? Explain considering meanings of absolute m ...
... 5. Discussion: Print out the CM diagram and discuss your result. Q.1. Find the main sequence from the printed-out CM diagram. Enclose the main sequence by line with a width as narrow as possible. Q.2. What are the characteristics of the main-sequence stars? Explain considering meanings of absolute m ...
The Evolution of Stars - a More Detailed Picture (Chapter 8
... nuclear energy source, the centre of the star is initially hotter than the edge of the core and heat flows down this temperature gradient, cooling the centre and heating up the outside. This continues until the core becomes isothermal. The isothermal core grows slowly in mass as the shell gradually ...
... nuclear energy source, the centre of the star is initially hotter than the edge of the core and heat flows down this temperature gradient, cooling the centre and heating up the outside. This continues until the core becomes isothermal. The isothermal core grows slowly in mass as the shell gradually ...
Science performance of Gaia, ESA`s space
... • Gaia will detect tens of thousands of brown dwarfs, both drifting through space in isolation and in orbit around other stars (Haywood and Jordi 2002). This data is vital for investigating the physics of star formation since brown dwarfs represent stars that “just did not make it” to core hydrogen ...
... • Gaia will detect tens of thousands of brown dwarfs, both drifting through space in isolation and in orbit around other stars (Haywood and Jordi 2002). This data is vital for investigating the physics of star formation since brown dwarfs represent stars that “just did not make it” to core hydrogen ...
20_LectureOutline
... • When fusion ceases in the core, it begins to collapse and heat. Hydrogen fusion starts in the shell surrounding the core. • The helium core begins to heat up; as long as the star is at least 0.25 solar masses, the helium will get hot enough that fusion (to carbon) will start. • As the core collaps ...
... • When fusion ceases in the core, it begins to collapse and heat. Hydrogen fusion starts in the shell surrounding the core. • The helium core begins to heat up; as long as the star is at least 0.25 solar masses, the helium will get hot enough that fusion (to carbon) will start. • As the core collaps ...
PowerPoint Presentation - 16. Properties of Stars
... • All main sequence stars fuse H into He in their cores. • Luminosity depends directly on mass because: • more mass means more weight from the star’s outer layers • nuclear fusion rates must be higher in order to maintain ...
... • All main sequence stars fuse H into He in their cores. • Luminosity depends directly on mass because: • more mass means more weight from the star’s outer layers • nuclear fusion rates must be higher in order to maintain ...
The Official Magazine of the University Of St Andrews Astronomical Society 1
... For starters, a small band of the Milky Way runs right through the centre of Perseus, making it a lovely sight through binoculars. And while you’ve got them out, check out The Double Cluster ( NGC 869 and NGC 884), two open clusters right next to each other between the top of Perseus and Cassiopeia. ...
... For starters, a small band of the Milky Way runs right through the centre of Perseus, making it a lovely sight through binoculars. And while you’ve got them out, check out The Double Cluster ( NGC 869 and NGC 884), two open clusters right next to each other between the top of Perseus and Cassiopeia. ...
The cosmic distance scale
... The rotational velocity of a spiral galaxy can be measured from the HI integrated spectrum. The HI gas in a spiral follows very closely circular orbits at a speed Vc . If the galaxy is inclined at an angle i to the line of sight, the observed line of sight velocity will vary from + Vc sin i to - Vc ...
... The rotational velocity of a spiral galaxy can be measured from the HI integrated spectrum. The HI gas in a spiral follows very closely circular orbits at a speed Vc . If the galaxy is inclined at an angle i to the line of sight, the observed line of sight velocity will vary from + Vc sin i to - Vc ...
Solution
... the red one must be smaller. But by Stefan-Boltzmann's Law, its luminosity/area must also be smaller, and they are the same size. So the red one is less luminous. 3. ( T F ) Using parallax, astronomers can now reliably measure the distance of most of the stars in our galaxy. False. Sad to say, most ...
... the red one must be smaller. But by Stefan-Boltzmann's Law, its luminosity/area must also be smaller, and they are the same size. So the red one is less luminous. 3. ( T F ) Using parallax, astronomers can now reliably measure the distance of most of the stars in our galaxy. False. Sad to say, most ...
Description of Pictures In the Dome
... The Pleiades, or seven sisters, (M 45) is an open star cluster containing relatively young hot B-type stars located in the constellation of Taurus. It is among the nearest star clusters to Earth and is the cluster most obvious to the naked eye in the night sky. Pleiades has several meanings in diff ...
... The Pleiades, or seven sisters, (M 45) is an open star cluster containing relatively young hot B-type stars located in the constellation of Taurus. It is among the nearest star clusters to Earth and is the cluster most obvious to the naked eye in the night sky. Pleiades has several meanings in diff ...
PHYS3380_110215_bw - The University of Texas at Dallas
... •In stars more than 1.3 times the mass of the Sun, the nuclear fusion of hydrogen into helium occurs via CNO cycle instead of the proton-proton chain. The CNO process is very temperature sensitive, so the core is very hot but the temperature falls off rapidly. Therefore, the core region forms a conv ...
... •In stars more than 1.3 times the mass of the Sun, the nuclear fusion of hydrogen into helium occurs via CNO cycle instead of the proton-proton chain. The CNO process is very temperature sensitive, so the core is very hot but the temperature falls off rapidly. Therefore, the core region forms a conv ...
ASTRONOMY 113 Laboratory Lab 5: Spectral Classification of the
... these clusters are bound to each other by gravity. Star clusters are also valuable laboratories for the study of stars, because within any given cluster all of the stars have the same age, composition, and distance. This permits us to study the relationships between fundamental stellar properties su ...
... these clusters are bound to each other by gravity. Star clusters are also valuable laboratories for the study of stars, because within any given cluster all of the stars have the same age, composition, and distance. This permits us to study the relationships between fundamental stellar properties su ...
Section 2
... Orion constellations. For example, a large constellation in the winter sky is named Orion, the Hunter, after a Greek myth. In this constellation, Orion is seen with a sword in his belt and an upraised arm. The ancient Sumerians thought that the stars in Orion formed the outline of a sheep. In anci ...
... Orion constellations. For example, a large constellation in the winter sky is named Orion, the Hunter, after a Greek myth. In this constellation, Orion is seen with a sword in his belt and an upraised arm. The ancient Sumerians thought that the stars in Orion formed the outline of a sheep. In anci ...
File - Mr. Gray`s Class
... Neptune have them as well - but its system of rings and ringlets is so huge that it would almost fill the space between our Earth and its Moon. These rings, by the way, are not solid, but consist of billions of icy pieces following a well-organized traffic pattern around Saturn's equator. Saturn's l ...
... Neptune have them as well - but its system of rings and ringlets is so huge that it would almost fill the space between our Earth and its Moon. These rings, by the way, are not solid, but consist of billions of icy pieces following a well-organized traffic pattern around Saturn's equator. Saturn's l ...
Stellar Evolution
... B-star spectrum; Si II, Mn II, Cr II, Eu II, Sr II are strong. H lines strong, Ca II H & K strengthen toward later type. A-star spectrum; Si II, Mn II, Cr II, Eu II, Sr II are strong. A-star spectrum + Fe lines unusually strong. Metals, H lines weaken, Ca II strengthen — emission “bumps” appear in H ...
... B-star spectrum; Si II, Mn II, Cr II, Eu II, Sr II are strong. H lines strong, Ca II H & K strengthen toward later type. A-star spectrum; Si II, Mn II, Cr II, Eu II, Sr II are strong. A-star spectrum + Fe lines unusually strong. Metals, H lines weaken, Ca II strengthen — emission “bumps” appear in H ...
ASTRO-114--Lecture 37-
... background behind an object you’re looking at and so you can tell how far away an object is by how much parallax you see with it from one eye to the other. In other words, looking at your thumb, shifting from one eye to the other, you see a shift. You can then tell your thumb is fairly close. Now, l ...
... background behind an object you’re looking at and so you can tell how far away an object is by how much parallax you see with it from one eye to the other. In other words, looking at your thumb, shifting from one eye to the other, you see a shift. You can then tell your thumb is fairly close. Now, l ...
Boötes
Boötes /boʊˈoʊtiːz/ is a constellation in the northern sky, located between 0° and +60° declination, and 13 and 16 hours of right ascension on the celestial sphere. The name comes from the Greek Βοώτης, Boōtēs, meaning herdsman or plowman (literally, ox-driver; from βοῦς bous “cow”). The ""ö"" in the name is a diaeresis, not an umlaut, meaning that each 'o' is to be pronounced separately.One of the 48 constellations described by the 2nd century astronomer Ptolemy, Boötes is now one of the 88 modern constellations. It contains the fourth brightest star in the night sky, the orange-hued Arcturus. Boötes is home to many other bright stars, including eight above the fourth magnitude and an additional 21 above the fifth magnitude, making a total of 29 stars easily visible to the naked eye.