Lecture 13: The stars are suns
... Magnitude system was invented by Hipparchus (190-120 BC) – he ranked stars by their apparent brightness from ‘first magnitude’ (brightest) to ‘sixth magnitude’ (dimmest). Bright stars have low magnitudes (measure of faintness). A difference of 5 magnitudes corresponds to a factor of 100 in brightnes ...
... Magnitude system was invented by Hipparchus (190-120 BC) – he ranked stars by their apparent brightness from ‘first magnitude’ (brightest) to ‘sixth magnitude’ (dimmest). Bright stars have low magnitudes (measure of faintness). A difference of 5 magnitudes corresponds to a factor of 100 in brightnes ...
1” “Sky-Notes” of the Open University Astronomy Club. April 2006. 1
... northeast to locate NGC4569 (M90) (9.5). Return to M89 and move 2o eastsoutheast to locate NGC4579 (M58) (9.8). From M58 sweep just over a degree east to locate NGC4621 (M59) (9.8) & NGC4649 (M60) (8.8) visible in the same low-power field. Return to M87 and move about 4o south to NGC4472 (M49) (8.4) ...
... northeast to locate NGC4569 (M90) (9.5). Return to M89 and move 2o eastsoutheast to locate NGC4579 (M58) (9.8). From M58 sweep just over a degree east to locate NGC4621 (M59) (9.8) & NGC4649 (M60) (8.8) visible in the same low-power field. Return to M87 and move about 4o south to NGC4472 (M49) (8.4) ...
Star Maps and Constellations (pdf 3.7 Megs)
... anything to do with a crab, it's an alternative (older?) interpretation of the constellation. Often times the name of the star is Arabic, which will have to do then with an Arabic interpretation of the constellation.3 In fact you'll note that the majority of star names are Arabic in origin. Further, ...
... anything to do with a crab, it's an alternative (older?) interpretation of the constellation. Often times the name of the star is Arabic, which will have to do then with an Arabic interpretation of the constellation.3 In fact you'll note that the majority of star names are Arabic in origin. Further, ...
THE HR DIAGRAM
... This can occur rapidly or gradually depending on the mass of the star, but in either case it causes the star to expand to a greater radius than that of the main sequence star. During the expansion the star cools considerably. A low mass star that was a yellow or orange main sequence star evolves to ...
... This can occur rapidly or gradually depending on the mass of the star, but in either case it causes the star to expand to a greater radius than that of the main sequence star. During the expansion the star cools considerably. A low mass star that was a yellow or orange main sequence star evolves to ...
Binary Star Systems Discussion Points 1. What characteristic of a
... Use the light curves for six eclipsing binary star systems on the next page to answer the rest of the questions. 13. Which light curve shows a system where the two stars are the most different from one another? 14. Which light curve shows a system where the two stars are the most similar to one anot ...
... Use the light curves for six eclipsing binary star systems on the next page to answer the rest of the questions. 13. Which light curve shows a system where the two stars are the most different from one another? 14. Which light curve shows a system where the two stars are the most similar to one anot ...
Lab 2: The Planisphere
... distortion, constellations in the sky will not appear as they do on the planisphere, but the planisphere can help us identify bright stars and give us a general idea of where to look for other stars. It's also very useful in figuring out when certain star will rise or set. The best way to get comfor ...
... distortion, constellations in the sky will not appear as they do on the planisphere, but the planisphere can help us identify bright stars and give us a general idea of where to look for other stars. It's also very useful in figuring out when certain star will rise or set. The best way to get comfor ...
formation of stars
... in space of which most are invisible. A diffuse nebulae is made visible from the light of a nearby bright star. [Great Nebula in the constellation Orion.] Other nebulae, called dark nebula show up as a dark patch against the more distant stars. [The Horsehead Nebula in Orion] ...
... in space of which most are invisible. A diffuse nebulae is made visible from the light of a nearby bright star. [Great Nebula in the constellation Orion.] Other nebulae, called dark nebula show up as a dark patch against the more distant stars. [The Horsehead Nebula in Orion] ...
here.
... - 12Gyr old and no longer forming in the Milky Way Galaxy - Not possible to study their formation ...
... - 12Gyr old and no longer forming in the Milky Way Galaxy - Not possible to study their formation ...
Teacher Subject Title Concept Context Tek/SE Verb
... Objects in the sky can be described and illustrated. We can observe objects in the sky, such as the Moon, Sun, and stars. — When is the best time to observe stars? — When is the best time to observe the Sun? The Sun is our nearest star. — What is the Sun? Objects in the sky can be described and illu ...
... Objects in the sky can be described and illustrated. We can observe objects in the sky, such as the Moon, Sun, and stars. — When is the best time to observe stars? — When is the best time to observe the Sun? The Sun is our nearest star. — What is the Sun? Objects in the sky can be described and illu ...
Stars Study Guide KEY
... Why? They have less self-gravity which means they burn through their fuel slower. 8. What will happen to our star, the Sun, at the end of its life? The sun will expand in the Red Giant phase, then will release its outer layers to form a planetary nebula. It will become a white dwarf and then over ti ...
... Why? They have less self-gravity which means they burn through their fuel slower. 8. What will happen to our star, the Sun, at the end of its life? The sun will expand in the Red Giant phase, then will release its outer layers to form a planetary nebula. It will become a white dwarf and then over ti ...
Teachers Notes - Edinburgh International Science Festival
... the cup. Point the bottom of the cup at a plain surface, and view your constellation. You may need to adjust the cup’s distance from the surface or the torch to get a clear image. ...
... the cup. Point the bottom of the cup at a plain surface, and view your constellation. You may need to adjust the cup’s distance from the surface or the torch to get a clear image. ...
M = 5.5 - The Millstone
... stellar distance (by other means). Absolute magnitude, M, expresses the brightness of a star as it would be if it were placed 10 parsecs away. Since all stars would be placed at the same distance, absolute magnitudes show differences in actual luminosities. It is a measure based on stellar analysis ...
... stellar distance (by other means). Absolute magnitude, M, expresses the brightness of a star as it would be if it were placed 10 parsecs away. Since all stars would be placed at the same distance, absolute magnitudes show differences in actual luminosities. It is a measure based on stellar analysis ...
Characteristics of Stars ppt.
... The color of a star depends on its temperature, from red and orange (cool stars) to yellow and white (hotter stars) to blue (very hot stars). ...
... The color of a star depends on its temperature, from red and orange (cool stars) to yellow and white (hotter stars) to blue (very hot stars). ...
Properties of Stars
... Death of Medium-Mass Stars • Stars with masses similar to the sun evolve in essentially the same way as low-mass stars. • During their collapse from red giants to white dwarfs, mediummass stars are thought to cast off their bloated outer layer, creating an expanding round cloud of gas called plane ...
... Death of Medium-Mass Stars • Stars with masses similar to the sun evolve in essentially the same way as low-mass stars. • During their collapse from red giants to white dwarfs, mediummass stars are thought to cast off their bloated outer layer, creating an expanding round cloud of gas called plane ...
Stellar Evolution Before…..During……and After…. The Main
... In a Main Sequence star Hydrostatic Equilibrium balances 2 forces, pressure and gravity, to keep the star from imploding or exploding. If the mass of the outer portion of the star was ...
... In a Main Sequence star Hydrostatic Equilibrium balances 2 forces, pressure and gravity, to keep the star from imploding or exploding. If the mass of the outer portion of the star was ...
Date_________________ TWINKLE, TWINKLE
... they appear to us, just as car headlights vary in brightness depending on how close they are. To handle this problem, astronomers have defined two properties for stars. The first property is absolute magnitude (M) which is how bright a star would appear if it was at a fixed distance away from the Ea ...
... they appear to us, just as car headlights vary in brightness depending on how close they are. To handle this problem, astronomers have defined two properties for stars. The first property is absolute magnitude (M) which is how bright a star would appear if it was at a fixed distance away from the Ea ...
The IC 348 surface density in the Perseus molecular cloud L. Cambrésy Observatoire de Strasbourg, France
... the cluster morphology cluster morphology ...
... the cluster morphology cluster morphology ...
The Characteristics of Stars
... surface temperature appears bluish-white, whereas the star with the lower surface temperature appears reddish-white (Figure 3). Our Sun, with a surface temperature of 6000 °C, appears yellowish-white and falls midway between bluish stars and reddish stars. Table 2 lists the approximate temperature r ...
... surface temperature appears bluish-white, whereas the star with the lower surface temperature appears reddish-white (Figure 3). Our Sun, with a surface temperature of 6000 °C, appears yellowish-white and falls midway between bluish stars and reddish stars. Table 2 lists the approximate temperature r ...
Evolution of Stars and Galaxies
... Patterns of stars: Constellations Ancient cultures used mythology or everyday items to name constellations. Constellations: Patterns of stars in the night sky ...
... Patterns of stars: Constellations Ancient cultures used mythology or everyday items to name constellations. Constellations: Patterns of stars in the night sky ...
Test 2 Review Topics
... 38. What is the only direct method for measuring distance? a. Sketch the system that shows this measurement. b. Recall the formula. c. Be able to calculate a distance in parsecs and light years. 39. Differentiate between intrinsic and apparent brightness. 40. Differentiate between luminosity and flu ...
... 38. What is the only direct method for measuring distance? a. Sketch the system that shows this measurement. b. Recall the formula. c. Be able to calculate a distance in parsecs and light years. 39. Differentiate between intrinsic and apparent brightness. 40. Differentiate between luminosity and flu ...
Corona Australis
Corona Australis /kɵˈroʊnə ɒˈstreɪlɨs/ or Corona Austrina /kɵˈroʊnə ɒˈstraɪnə/ is a constellation in the Southern Celestial Hemisphere. Its Latin name means ""southern crown"", and it is the southern counterpart of Corona Borealis, the northern crown. One of the 48 constellations listed by the 2nd-century astronomer Ptolemy, it remains one of the 88 modern constellations. The Ancient Greeks saw Corona Australis as a wreath rather than a crown and associated it with Sagittarius or Centaurus. Other cultures have likened the pattern to a turtle, ostrich nest, a tent, or even a hut belonging to a rock hyrax.Although fainter than its namesake, the oval- or horseshoe-shaped pattern of its brighter stars renders it distinctive. Alpha and Beta Coronae Australis are the two brightest stars with an apparent magnitude of around 4.1. Epsilon Coronae Australis is the brightest example of a W Ursae Majoris variable in the southern sky. Lying alongside the Milky Way, Corona Australis contains one of the closest star-forming regions to our Solar System—a dusty dark nebula known as the Corona Australis Molecular Cloud, lying about 430 light years away. Within it are stars at the earliest stages of their lifespan. The variable stars R and TY Coronae Australis light up parts of the nebula, which varies in brightness accordingly.