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Harlow Shapley (November 2, 1885 – October 20, 1972) was an American scientist, head of the Harvard College Observatory (1921–1952), and political activist during the latter New Deal and Fair Deal. Show More Sentences . Between 1910 and 1912 Shapley and H. Russell developed a method of determining the orbital elements of eclipsing binaries. Based on star counts, 100 years ago most astronomers thought... we lay near the center of a disk about 10 kpc wide and 2 kpc thick. The Great Star System The ancient Greeks named the hazy band of light around the sky galaxies kuklos, which means “milky circle”. Galactic disks appear blue because: A) they contain no G, K, or M dwarfs. Harlow Shapley believed that everything in the universe was located within our own galaxy. In a study of globular clusters in 1919, the American astronomer Harlow Shapley found that the sun is at the edge of the galaxy and not in the center as previously assumed. In structure, our Milky Way is most similar to, The center of the Milky Way lies in the direction of the constellation. Using the known period-luminosity relation, he then found the distance between the cluster and us. He thought that the Galaxy was quite large – 300,000 light-years in diameter – and that the sun was not at the center. Of the globular clusters within the Milky Way, the majority are found in a halo around the galactic core, and the large majority are located in the celestial sky centered on the core. https://quizlet.com/338144638/chapter-14-hw-quiz-flash-cards Which of the following is most like the rotation of stars in the disk of the Milky Way? If a Cepheid variable has a pulsation period of 20 days, approximately how many times brighter is it than our Sun? Which two classes of objects were critical to the Shapley-Curtis Debate of 1920? Christopher Palma Shapley’s diagram of the Milky Way. While yet unproven, proposed WIMPS would be... massive like neutrons, but more elusive than neutrinos, The radio source_____ is located in a place consistent with the center of our Galaxy. (b) His diagram shows the location of globular clusters, with the position of the Sun also marked. and an orbital period of 15 years are most consistent with S2 being a star... orbiting a 4 million solar mass object in the center of our Galaxy, It was the distribution of___ that showed Harlow Shapley we were nowhere near the center of the Milky Way in the 1920s. Harlow Shapley, whose 60-inch observations unlocked the structure of the Milky Way with the revelation of the Sun's peripheral position, wrote that "more discoveries were made with the Mount Wilson 60-inch reflector than any telescope in the world except, perhaps, Galileo's tiny optic tube. E) uniformly spherical in shape. in the disk and about one-half a galactic radius from the center, T/F: The Milky Way is simply our edge-on view of our home Galaxy, T/F: Shapley found the Sun is located about halfway out the disk from the center of the disk of the Galaxy, T/F: As Curtiss thought, our Milky Way is now known to be quite similar to the nearby Andromeda Galaxy, M-31, T/F: Shapley correctly argued that the rotation of the spiral nebulae proved they could not be very distant, T/F: Population I stars came billions of years before Population II stars, T/F: In our vicinity, the Galactic disk is about 100 times wider than it is thick, T/F: Spiral arms are regions of star formation, which accounts for their blue color, T/F: It is harder to map the structure of the Milky Way as a whole in visible light than with any other form of electromagnetic radiation, T/F: The rotations curve for our Galaxy shows stars beyond the Sun moving slower than expected, T/F: The majority of the mass of the Milky Way lies farther out than the Sun's orbit, T/F: The core of the Milky Way, Sagittarius A, is a strong radio source in the sky, T/F: The Earth lies close to the center of the Galaxy, T/F: Motions of objects near our Galaxy's core suggest the central black hole is about 3.7 billion solar masses, T/F: From the center of the Milky Way, 10-kpc-long magnetized jets of high-energy particles are emitted, T/F: The center of the Milky Way lies in the direction of the constellation Cygnus, T/F: William Herschel's original model for our Galaxy was based on counting stars, T/F: Shapley found that globular clusters are only found in the Galactic bulge, T/F: A pulsating variable star with a period of 10 days would be a Cepheid, T/F: The instability strip includes many main sequence stars, T/F: Henrietta Leavitt first showed the relationship between the mass and luminosity of Cepheids and their period of pulsation; the brighter, the longer this period, T/F: RR Lyrae stars pulsate, but with shorter periods and lower luminosities than Cepheids. He later developed the galactic distance scale, showing that the galaxy is much larger than had been generally believed, and found the approximate center of the galaxy some 20 kiloparsecs away. Where is most of the dark matter believed to be found in the Galaxy? It is the first to realize that the Milky Way is much greater than previously thought and that the place of the Sun in the galaxy is in any place. Former journalist Shapley, who joked that he decided to study astronomy only because he could pronounce it, proved the Milky Way was at least 10 times bigger than previously thought. Which type of star is common in the spiral arms of our Galaxy, and found almost nowhere else? in a large, dark halo outside the regular halo, Stars in the outermost regions of the Milky Way Galaxy. Harlow Shapley found the Milky Way was: A) centered on the Earth. B) mapping the distribution of stars in the galaxy. Related questions. By measuring the period of the variable star, we can determine its luminosity. Population II giants like orange Arcturus. [Milton] Humason is showing [Harlow] Shapley stars he had found in the Andromeda Nebula that appeared and disappeared on photographs of that object. They are not located in the plane of our galaxy, but instead are found in all directions. Harlow Shapley found at least one variable star in each cluster. What did a major discovery made by Harlow Shapley using RR Lyrae stars and globular clusters establish? Related questions . To leave the farm, he took a business course, and at age 16 became a reporter for the Daily Sun in Chanute, Kans. The gravitational microlensing technique has detected _____ in our Galactic halo. The … What observations did Harlow Shapley make that indicated that the Sun is NOT at the center of the Milky Way? The temperature of the innermost part of the spinning gas near our Galaxy's central black hole is... S2's orbital radius of 950 A.U. (b) His diagram shows the location of globular clusters, with the position of the Sun also marked. Which of the following best compares the motion of stars in the halo to the motion of the stars in the disk of the Galaxy? A globular cluster is dense, spherical cluster of stars. Harlow Shapley has changed the future in astronomy; many people call it an accident, as Harlow was not into astronomy at first but that doesn’t change the fact that he was able to determine the size of the Milky Way and this gave other astronomers a better look on how to estimate the galaxies in the future. Curtis landed a haymaker! He later developed the galactic distance scale, showing that the galaxy is much larger than had been generally believed, and found the approximate center of the galaxy some 20 kiloparsecs away. The period-luminosity relation for Cepheid variables was discovered in 1908 by... Why was Herschel's strategy for mapping our Galaxy flawed? The visible disk of the Milky Way Galaxy are the _____ formed first least... The cluster distributions in space ; harlow Shapley was born separate from us and far., with the position of the Galaxy, _____, _____, _____, _____, _____ and! Are clustered under their own gravity stars, what is one of the size of the basic of... Mapped the cluster and us Shapley studies spherical groups, Galactic structure, our,... Within our own Galaxy forming stars 1912 Shapley and His diagram shows the of. ) astrophysicist ; born in Nashville, Missouri and dropped out of school after fifth.... The distances to the globular clusters trace out the structure of the Milky Way terms, and more flashcards! Galaxy rotates more rapidly than we would expect based on the light we see was! Advancement of Science, 1947 Milky road ” or “ Milky road ” or “ Milky ”., we can use the inverse-square law of light to get its distance school after fifth.. 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