astrocoursespring2012lec5-1-1
... At first it wasn't understood what these objects were, since their spectra were unlike those of any known stars. Its spectrum did not resemble that of any normal stars with typical stellar elements. 3C 273 was the first object to be identified as what we now know quasars to be — extremely luminous o ...
... At first it wasn't understood what these objects were, since their spectra were unlike those of any known stars. Its spectrum did not resemble that of any normal stars with typical stellar elements. 3C 273 was the first object to be identified as what we now know quasars to be — extremely luminous o ...
Physics: Principle and Applications, 7e (Giancoli) Chapter 33
... A) neutron stars. B) red giant stars. C) regular stars like our sun. D) white dwarfs. Answer: A Var: 1 7) Black holes A) are gaps in space, containing no matter. B) are predicted by Einstein's special theory of relativity. C) are the collapsed remnant of giant stars. D) cannot be detected in binary ...
... A) neutron stars. B) red giant stars. C) regular stars like our sun. D) white dwarfs. Answer: A Var: 1 7) Black holes A) are gaps in space, containing no matter. B) are predicted by Einstein's special theory of relativity. C) are the collapsed remnant of giant stars. D) cannot be detected in binary ...
Chapter 13 (Properties of Stars)
... diagram, yet the majority of nearby stars are found to the lower right of our star. Relate this to the limitations of human vision. 3. Sirius and its companion are almost the same temperature, yet Sirius is about 10,000x brighter than its companion. Explain why they differ so much in luminosity. 4. ...
... diagram, yet the majority of nearby stars are found to the lower right of our star. Relate this to the limitations of human vision. 3. Sirius and its companion are almost the same temperature, yet Sirius is about 10,000x brighter than its companion. Explain why they differ so much in luminosity. 4. ...
The Milky Way galaxy
... Your book gives estimates of the mass of the Galaxy from 1 to 4 X 1011 solar masses. A more recent determination of the mass of the Galaxy is even larger, 1.5-4.0 X 1012 solar masses. This is on the basis of stars of known absolute magnitude called horizontal branch stars. An analysis of 1000 of th ...
... Your book gives estimates of the mass of the Galaxy from 1 to 4 X 1011 solar masses. A more recent determination of the mass of the Galaxy is even larger, 1.5-4.0 X 1012 solar masses. This is on the basis of stars of known absolute magnitude called horizontal branch stars. An analysis of 1000 of th ...
Stars (Ch. 13)
... are blue and more luminous, while the coolest stars are red and dim – Star’s position on sequence determines its mass, being more near the top of the ...
... are blue and more luminous, while the coolest stars are red and dim – Star’s position on sequence determines its mass, being more near the top of the ...
Solutions to Homework #4, AST 203, Spring 2009
... c) If a 3.5 M main-sequence star is orbiting a 2.5 M red giant, the red giant must have been more massive than 3M when it was a main-sequence star. (7 points) Solution This statement makes sense. The 2.5M red giant had to be more massive than its companion at some point in the past in order for ...
... c) If a 3.5 M main-sequence star is orbiting a 2.5 M red giant, the red giant must have been more massive than 3M when it was a main-sequence star. (7 points) Solution This statement makes sense. The 2.5M red giant had to be more massive than its companion at some point in the past in order for ...
The Sun and other Stars
... coolest is: ______________________ A star’s spectral class is determined by the lines in its spectrum Hot objects are blue and cool objects are red. Class O & B stars are bluish, K & M stars are reddish. ...
... coolest is: ______________________ A star’s spectral class is determined by the lines in its spectrum Hot objects are blue and cool objects are red. Class O & B stars are bluish, K & M stars are reddish. ...
OUR COSMIC NEIGHBORS Story of the Stars
... of truths and principles best known to the early men who conceived them. Today we still use the names that they gave to the constellations of stars. Perhaps their history is written in the night sky! Modern astronomers, however, see more than legends in the stars. With their great telescopes and oth ...
... of truths and principles best known to the early men who conceived them. Today we still use the names that they gave to the constellations of stars. Perhaps their history is written in the night sky! Modern astronomers, however, see more than legends in the stars. With their great telescopes and oth ...
Astronomy 122 mid Term Exam
... Use the blackbody simulator to get a better feel for this inverse relation and review the material in Module 1 Lecture F. Also, as I said in class, if this inverse relation did not hold then cooler objects would be emitting short wavelength high energy photons which doesn’t make any physical sense b ...
... Use the blackbody simulator to get a better feel for this inverse relation and review the material in Module 1 Lecture F. Also, as I said in class, if this inverse relation did not hold then cooler objects would be emitting short wavelength high energy photons which doesn’t make any physical sense b ...
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... • 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) ...
Star Information ppt.
... These two stars have about the same luminosity -- which one appears brighter? A. Alpha Centauri B. The Sun ...
... These two stars have about the same luminosity -- which one appears brighter? A. Alpha Centauri B. The Sun ...
transparencies
... one site into the star propagates with a finite velocity inside the star and a sudden modification of the radius occurs. Non radial modes develops and GW bursts can be emitted before a new equilibrium configuration is reached ...
... one site into the star propagates with a finite velocity inside the star and a sudden modification of the radius occurs. Non radial modes develops and GW bursts can be emitted before a new equilibrium configuration is reached ...
Measuring Motion, Doppler Effect—28 Oct Outline • Announcements
... – A single wavelength is seen on 1 Oct. – Two wavelengths are seen on 2 Oct – Separation of two wavelengths grows larger, then smaller. ...
... – A single wavelength is seen on 1 Oct. – Two wavelengths are seen on 2 Oct – Separation of two wavelengths grows larger, then smaller. ...
OVERVIEW: Stars and space
... 13.10 What is the life history of stars? Using skills, knowledge and understanding of how science works: • to explain how stars are able to maintain their energy output for millions of years • to explain why the early Universe contained only hydrogen but now contains a large variety of different ele ...
... 13.10 What is the life history of stars? Using skills, knowledge and understanding of how science works: • to explain how stars are able to maintain their energy output for millions of years • to explain why the early Universe contained only hydrogen but now contains a large variety of different ele ...
Star Spectra - Renton School District
... The interior of a star produces a continuous spectrum of light, like a rainbow. Cooler gases in the outer layers of the star absorb certain wavelengths of light, causing dark lines to appear in the spectrum. The resulting absorption spectrum can tell astronomers a great deal about the star. 1. On th ...
... The interior of a star produces a continuous spectrum of light, like a rainbow. Cooler gases in the outer layers of the star absorb certain wavelengths of light, causing dark lines to appear in the spectrum. The resulting absorption spectrum can tell astronomers a great deal about the star. 1. On th ...
Stellar Characteristics and Evolution
... Star (and their attendant planets, if there are any) condense out of a protostellar nebula, a vast cloud of gas and dust that may be hundreds of AU in diameter initially. The cloud flattens into a disk due to its own rotation, spinning around a growing central mass of hydrogen and helium. Eventually ...
... Star (and their attendant planets, if there are any) condense out of a protostellar nebula, a vast cloud of gas and dust that may be hundreds of AU in diameter initially. The cloud flattens into a disk due to its own rotation, spinning around a growing central mass of hydrogen and helium. Eventually ...
88K PDF file
... (b) What does it tell you about their respective sizes? (a) The bluer star is hotter. (You don’t need to say anything about distance, relative size, luminosity, brightness, or anything else. If something is radiating thermally— as stars do— then bluer in color is higher temperature.) (b) The first p ...
... (b) What does it tell you about their respective sizes? (a) The bluer star is hotter. (You don’t need to say anything about distance, relative size, luminosity, brightness, or anything else. If something is radiating thermally— as stars do— then bluer in color is higher temperature.) (b) The first p ...
Instructor Notes
... L = brightness (luminosity) of star σ = a constant T = temperature A = area which depends on two contants (4 and π) and the radius (size) of the star) So, a bright star can be HOT, or it can be COOL BUT VERY VERY BIG ...
... L = brightness (luminosity) of star σ = a constant T = temperature A = area which depends on two contants (4 and π) and the radius (size) of the star) So, a bright star can be HOT, or it can be COOL BUT VERY VERY BIG ...
Test 3, February 7, 2007 - Brock physics
... 42. In order to detect a black hole one looks for (a) a spot into which stars and their planets fall. (b) a binary system where a companion star is not visible but has a mass greater than 3 solar masses and is an intense X-ray source. (c) intense source of visible light. (d) the accompanying white h ...
... 42. In order to detect a black hole one looks for (a) a spot into which stars and their planets fall. (b) a binary system where a companion star is not visible but has a mass greater than 3 solar masses and is an intense X-ray source. (c) intense source of visible light. (d) the accompanying white h ...
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.