Stellar Evolution and the HR Diagram – Study Guide
... c. Which is brighter, the sun or a white dwarf? The Sun (but not as hot) d. Is Vega brighter than our sun? Yes e. Is Antares hotter than our sun? No, it’s a giant, class K or M 22. Stars that move off the main sequence first move to the _Giant_ region of the HR diagram. These stars are fusing __heli ...
... c. Which is brighter, the sun or a white dwarf? The Sun (but not as hot) d. Is Vega brighter than our sun? Yes e. Is Antares hotter than our sun? No, it’s a giant, class K or M 22. Stars that move off the main sequence first move to the _Giant_ region of the HR diagram. These stars are fusing __heli ...
The Night Sky
... Annual motion of the stars The same stars are not visible all year long. Any given non-circumpolar star will set 4 minutes early each day until it becomes lost in the glare of the setting Sun. ...
... Annual motion of the stars The same stars are not visible all year long. Any given non-circumpolar star will set 4 minutes early each day until it becomes lost in the glare of the setting Sun. ...
Distances farther out
... Eg. 39 Cancri : Class K0 III => Mv = +0.5. & V = 6.4 = m log(D) = 2.2 => 150 pc away But !! Giant stars have spread about average --- , If 39 Cnc is as bright as Uma (ie Mv = -0.3), then it would be 50 % farther away. In a cluster can use several stars or whole main sequence to increase precisio ...
... Eg. 39 Cancri : Class K0 III => Mv = +0.5. & V = 6.4 = m log(D) = 2.2 => 150 pc away But !! Giant stars have spread about average --- , If 39 Cnc is as bright as Uma (ie Mv = -0.3), then it would be 50 % farther away. In a cluster can use several stars or whole main sequence to increase precisio ...
Astronomy Library wk 6.cwk (WP)
... Cool stars (e.g. 3000K) will emit their light at what wavelength (relatively short or long)? ...
... Cool stars (e.g. 3000K) will emit their light at what wavelength (relatively short or long)? ...
Presentation 2
... nightly walk along the grassy pasture. As they took part in their walk, Josslyn stared into the clear summer sky studying all the bright stars in her view. She had glazed at the sky many times before, but tonight, she noticed something she had never seen before. She noticed a picture in the sky. She ...
... nightly walk along the grassy pasture. As they took part in their walk, Josslyn stared into the clear summer sky studying all the bright stars in her view. She had glazed at the sky many times before, but tonight, she noticed something she had never seen before. She noticed a picture in the sky. She ...
Related Handout - Orange County Astronomers
... miles, and it circles the Sun in 29.5 years at an average distance of 9.5 AU. The number of its moons, at last count, exceeds 20. Several of them are visible in amateur scopes. Titan, the largest moon of the solar system is easily seen in small scopes. Larger amateur scopes can show as many as 10. S ...
... miles, and it circles the Sun in 29.5 years at an average distance of 9.5 AU. The number of its moons, at last count, exceeds 20. Several of them are visible in amateur scopes. Titan, the largest moon of the solar system is easily seen in small scopes. Larger amateur scopes can show as many as 10. S ...
10.1 The Solar Neighborhood Barnard`s Star
... 10.5 The Hertzsprung-Russell Diagram An H-R diagram of the 100 brightest stars looks quite different: These stars are all more luminous than the Sun. Two new categories appear here – the red giants and the blue giants. Clearly, the brightest stars in the sky appear bright because of their enormous ...
... 10.5 The Hertzsprung-Russell Diagram An H-R diagram of the 100 brightest stars looks quite different: These stars are all more luminous than the Sun. Two new categories appear here – the red giants and the blue giants. Clearly, the brightest stars in the sky appear bright because of their enormous ...
Properties of Stars
... 10. Our Sun has a temperature of 5800 K (which is 6073°Celsius) and an absolute magnitude of +4.7. Use a “” symbol to plot the location of the Sun on your diagram. To which group does the Sun belong? (label it “Sun” on your graph also) 11. Compare the absolute magnitude and temperature of the Sun w ...
... 10. Our Sun has a temperature of 5800 K (which is 6073°Celsius) and an absolute magnitude of +4.7. Use a “” symbol to plot the location of the Sun on your diagram. To which group does the Sun belong? (label it “Sun” on your graph also) 11. Compare the absolute magnitude and temperature of the Sun w ...
Earth Science: Chapter 7: Stellar Evolution: Spring 2017: Student
... Greater than 20 Less than 10 million years Same as above except the mass is great enough to solar masses form a BLACK HOLE (see below) Planetary nebula: after a red giant forms material from the star is ejected and forms what looks like a nebula. The name planetary is actually misnamed by an early a ...
... Greater than 20 Less than 10 million years Same as above except the mass is great enough to solar masses form a BLACK HOLE (see below) Planetary nebula: after a red giant forms material from the star is ejected and forms what looks like a nebula. The name planetary is actually misnamed by an early a ...
Indoor lab #1: The Hertzsprung-Russel Diagram and Selection Effects
... 1. Use the program “The Sky” to select 40 stars at random, and record the following properties in an Excel table. Note: do not include stars whose distances are not given. star name (use ANY of the names given) (put in Excel column 1) visual magnitude, m (col. 2), spectral type (col. 3), and ...
... 1. Use the program “The Sky” to select 40 stars at random, and record the following properties in an Excel table. Note: do not include stars whose distances are not given. star name (use ANY of the names given) (put in Excel column 1) visual magnitude, m (col. 2), spectral type (col. 3), and ...
SGL 9 NGC Galaxy magnitude 9/10 observing challenge Up for
... Move the scope left to pint SE and down to 70 degrees Declination to Leo Minor. This galaxy is completely different in appearance. It is another spiral and it is only 20 million light years away but is presenting itself face on to us. It is next to a field star and the hazy patch and star make a nic ...
... Move the scope left to pint SE and down to 70 degrees Declination to Leo Minor. This galaxy is completely different in appearance. It is another spiral and it is only 20 million light years away but is presenting itself face on to us. It is next to a field star and the hazy patch and star make a nic ...
Characterizing Stars - Department of Physics and Astronomy
... By carefully examining a star’s spectral lines, astronomers can determine whether that star is a main-sequence star, giant, supergiant, or white dwarf ...
... By carefully examining a star’s spectral lines, astronomers can determine whether that star is a main-sequence star, giant, supergiant, or white dwarf ...
Astro 10 Practice Test 2
... b. Emission nebulosity, caused by excitation of interstellar dust grains from the star’s intense stellar wind. c. Reflection nebulosity, where light from the star bounces off of tiny dust grains. d. Absorption nebulosity, in which the star’s light is dimmed and made redder by shining through clouds ...
... b. Emission nebulosity, caused by excitation of interstellar dust grains from the star’s intense stellar wind. c. Reflection nebulosity, where light from the star bounces off of tiny dust grains. d. Absorption nebulosity, in which the star’s light is dimmed and made redder by shining through clouds ...
Stars with mass less than 0.5 solar masses
... slowly till they swich off completely, in black dwarf. If a white dwarf is part of a bynar system, for example with a red giant, the first one can steal some of the red giant’s mass and prime the fusion of hydrogen in the external layers. This cause a a big explosion which can be seen from the Earth ...
... slowly till they swich off completely, in black dwarf. If a white dwarf is part of a bynar system, for example with a red giant, the first one can steal some of the red giant’s mass and prime the fusion of hydrogen in the external layers. This cause a a big explosion which can be seen from the Earth ...
word document - FacStaff Home Page for CBU
... In Section C we study multiple star systems to see what additional information we can obtain when two (or more) stars orbit each other. In Section D we consider the things other than stars that are out there: interstellar atoms, dust, and nebulae. These are related to the birth and death of stars co ...
... In Section C we study multiple star systems to see what additional information we can obtain when two (or more) stars orbit each other. In Section D we consider the things other than stars that are out there: interstellar atoms, dust, and nebulae. These are related to the birth and death of stars co ...
Problem 4: magnitude of the star?
... __E___9. A patch of sky shows a dark region nearly devoid of stars when viewed in visible light. However, an infrared image shows a small area within the region that is more than ten times as bright as the Sun. You are most likely observing A. A nova B. A pulsar C. A black hole D. A planetary nebula ...
... __E___9. A patch of sky shows a dark region nearly devoid of stars when viewed in visible light. However, an infrared image shows a small area within the region that is more than ten times as bright as the Sun. You are most likely observing A. A nova B. A pulsar C. A black hole D. A planetary nebula ...
Today: Magnitude Terminology Photometry Applications Reading
... Calibrated Magnitude: physically meaningful brightness of a star calibrated relative to the known flux standard (e.g. Vega); typically obtained by calculating differential magnitude w.r.t. a known standard star. ...
... Calibrated Magnitude: physically meaningful brightness of a star calibrated relative to the known flux standard (e.g. Vega); typically obtained by calculating differential magnitude w.r.t. a known standard star. ...
2-2 wkst - Home [www.petoskeyschools.org]
... ____________ 22. small hot stars that are dimmer than the sun ____________ 23. high-temperature stars that quickly use up their hydrogen ____________ 24. cool stars with high absolute magnitude ...
... ____________ 22. small hot stars that are dimmer than the sun ____________ 23. high-temperature stars that quickly use up their hydrogen ____________ 24. cool stars with high absolute magnitude ...
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.