The HR Diagram Interpreted (PowerPoint version)
... You may say “so what?” – perhaps you expected there to be very small stars. But further analysis reveals something amazing. ...
... You may say “so what?” – perhaps you expected there to be very small stars. But further analysis reveals something amazing. ...
The HR Diagram Interpreted: Properties of Stars
... You may say “so what?” – perhaps you expected there to be very small stars. But further analysis reveals something amazing. ...
... You may say “so what?” – perhaps you expected there to be very small stars. But further analysis reveals something amazing. ...
SCI 103
... 17) Polaris has not always been the “North Star”. Which of the statements below best describes the reason why Polaris has not always been the “North Star”? A) The stars are not really fixed to the celestial sphere and the motion of Polaris through space will move it away from the celestial pole and, ...
... 17) Polaris has not always been the “North Star”. Which of the statements below best describes the reason why Polaris has not always been the “North Star”? A) The stars are not really fixed to the celestial sphere and the motion of Polaris through space will move it away from the celestial pole and, ...
chart_set_2 - Physics and Astronomy
... Aristotle: Sun, Moon, Planets and Stars rotate around fixed Earth. Aristarchus: Used geometry of eclipses to show Sun bigger than Earth (and Moon smaller), so guessed Earth orbits Sun. Also guessed Earth spins on axis once a day => apparent motion of stars. Difficulty with Aristotle's "Geocentric" m ...
... Aristotle: Sun, Moon, Planets and Stars rotate around fixed Earth. Aristarchus: Used geometry of eclipses to show Sun bigger than Earth (and Moon smaller), so guessed Earth orbits Sun. Also guessed Earth spins on axis once a day => apparent motion of stars. Difficulty with Aristotle's "Geocentric" m ...
Sun and Stars
... glowing ball of plasma, which shines because of nuclear fusion in its core. This nuclear fusion releases energy which travels through the star's different layers and then radiates into outer space. ...
... glowing ball of plasma, which shines because of nuclear fusion in its core. This nuclear fusion releases energy which travels through the star's different layers and then radiates into outer space. ...
Angular Measurement
... • If the Moon were twice as far away, it would appear half as big—15´ across—even though its actual size would be the same. • Thus, angular size by itself is not enough to determine the actual diameter of an object—the distance must also be known. ...
... • If the Moon were twice as far away, it would appear half as big—15´ across—even though its actual size would be the same. • Thus, angular size by itself is not enough to determine the actual diameter of an object—the distance must also be known. ...
Motions of the Earth
... • This is not an INTRINSIC property of a star, but rather a combination of its Luminosity, distance and amount of dust along the line of sight. ...
... • This is not an INTRINSIC property of a star, but rather a combination of its Luminosity, distance and amount of dust along the line of sight. ...
Using the Southern Cross to find south
... stars never ‘set’ below the horizon but trace a circle in the sky. At the centre of these circles is a point called the South Celestial Pole. This part of the sky is directly above the South Pole of the Earth. That is, if you stood at the South Pole, the South Celestial Pole would be directly overhe ...
... stars never ‘set’ below the horizon but trace a circle in the sky. At the centre of these circles is a point called the South Celestial Pole. This part of the sky is directly above the South Pole of the Earth. That is, if you stood at the South Pole, the South Celestial Pole would be directly overhe ...
Planisphere Exercise
... planisphere. As the night progresses, which way do the stars appear to move around the North Star (which is hidden under the brass fastener) – clockwise or counterclockwise? As the night progresses, how do stars appear to move across the southern sky? In what direction does the celestial equator app ...
... planisphere. As the night progresses, which way do the stars appear to move around the North Star (which is hidden under the brass fastener) – clockwise or counterclockwise? As the night progresses, how do stars appear to move across the southern sky? In what direction does the celestial equator app ...
Astronomical Beliefs - Communicating Astronomy With The Public
... -time was measured against the length of the shadow -at noon they appeared to be standing on the shadow -other positions • Seasons: movement of the sun relative to overhead position. ...
... -time was measured against the length of the shadow -at noon they appeared to be standing on the shadow -other positions • Seasons: movement of the sun relative to overhead position. ...
Physics 127 Descriptive Astronomy Homework #2
... the zenith at an altitude of 63°. What is the star's declination? What is the declination of a star which passes through Provo's zenith? Since the altitude of the celestial equator, where it intersects the celestial meridian is 90° − observer’s latitude = 50° in Provo, a star which transits at an al ...
... the zenith at an altitude of 63°. What is the star's declination? What is the declination of a star which passes through Provo's zenith? Since the altitude of the celestial equator, where it intersects the celestial meridian is 90° − observer’s latitude = 50° in Provo, a star which transits at an al ...
Planisphere Exercise
... In what direction does the celestial equator appear to “rise” and “set” as the night progresses? Do these directions ever change? Turn the star wheel to find out. ...
... In what direction does the celestial equator appear to “rise” and “set” as the night progresses? Do these directions ever change? Turn the star wheel to find out. ...
Lecture082602 - Florida State University
... Sounds far, but we’ll see some really far distances ...
... Sounds far, but we’ll see some really far distances ...
The Celestial Sphere
... The bodies that are visible above the horizon for the full 24 hours. For a body to be circumpolar, two conditions must be met: 1. The declination of the body must have the same name as the observer’s latitude. ...
... The bodies that are visible above the horizon for the full 24 hours. For a body to be circumpolar, two conditions must be met: 1. The declination of the body must have the same name as the observer’s latitude. ...
Ourdraft
... Presenting the Research Process to High School Students Young Stars in IC 2118 We are studying a nebula (cloud of gas and dust) called Interstellar Cloud 2118, or the Witch Head Nebula, that is being excited by a young, very hot star called Rigel. Because Rigel is so energetic, it sends off shock wa ...
... Presenting the Research Process to High School Students Young Stars in IC 2118 We are studying a nebula (cloud of gas and dust) called Interstellar Cloud 2118, or the Witch Head Nebula, that is being excited by a young, very hot star called Rigel. Because Rigel is so energetic, it sends off shock wa ...
Constellations
... if they were all the same distance from earth. All stars place 32.6 LY from the sun Our sun abs. Mag = 4.8 Negative is brighter ...
... if they were all the same distance from earth. All stars place 32.6 LY from the sun Our sun abs. Mag = 4.8 Negative is brighter ...
Final Exam Prep
... FINAL EXAM PREPARATION: EARTH SCIENCE Final exams will be held this year starting June 19th . Finals count for 10% of your overall grade. Therefore, they can make a difference between an A and a B, a B and C etc; so please try to pass!! Our final covers just the second semester topics of Astronomy a ...
... FINAL EXAM PREPARATION: EARTH SCIENCE Final exams will be held this year starting June 19th . Finals count for 10% of your overall grade. Therefore, they can make a difference between an A and a B, a B and C etc; so please try to pass!! Our final covers just the second semester topics of Astronomy a ...
Stellar Magnitude, Distance, and Motion
... The star with the largest proper motion is called Barnard's Star. It moves 10.3 seconds of arc per year. o Since the moon subtends about 1/2 of a degree (which is 1/2 x 60 x 60 = 1800 seconds of arc) on the celestial sphere, it takes Barnard's star about 1800/10.3 ~ 180 years to change its posit ...
... The star with the largest proper motion is called Barnard's Star. It moves 10.3 seconds of arc per year. o Since the moon subtends about 1/2 of a degree (which is 1/2 x 60 x 60 = 1800 seconds of arc) on the celestial sphere, it takes Barnard's star about 1800/10.3 ~ 180 years to change its posit ...
3 Exam #1
... 30. Describe a simple observation which demonstrates why shadows of Earth cannot cause the phases of the Moon. In general terms, what does cause the phases of the Moon? 31. Explain why the position of the stars in the early evening sky changes with the seasons 32. Describe the apparent motion of the ...
... 30. Describe a simple observation which demonstrates why shadows of Earth cannot cause the phases of the Moon. In general terms, what does cause the phases of the Moon? 31. Explain why the position of the stars in the early evening sky changes with the seasons 32. Describe the apparent motion of the ...
Astronomy
... 31. ________ The brightness of a star as seen by human eyes on Earth. 32. ________ The tilt of the earth in relationship to the sun. 33. ________ A constellation so close to one of the celestial poles that it never sets or rises. 34. ________ The imaginary line around the sky directly above Earth’s ...
... 31. ________ The brightness of a star as seen by human eyes on Earth. 32. ________ The tilt of the earth in relationship to the sun. 33. ________ A constellation so close to one of the celestial poles that it never sets or rises. 34. ________ The imaginary line around the sky directly above Earth’s ...
1 - Northwest ISD Moodle
... The Earth’s path in this diagram is greatly exaggerated, however, it also shows how the Earth’s gravitational field could influence the Sun’s motion. When the Earth is closest to the Sun in its orbit (a point called Perihelion), as small as we are, we do influence the Sun slightly, pulling it ...
... The Earth’s path in this diagram is greatly exaggerated, however, it also shows how the Earth’s gravitational field could influence the Sun’s motion. When the Earth is closest to the Sun in its orbit (a point called Perihelion), as small as we are, we do influence the Sun slightly, pulling it ...
Chapter 18 Notes - Valdosta State University
... Most galaxies are thought to have a super massive black hole at the center. That would explain the high velocities of stars orbiting near the center, the tremendous energy generated by the core and the shape of most galaxies. The most distant objects detected in the universe are called quasars (qua ...
... Most galaxies are thought to have a super massive black hole at the center. That would explain the high velocities of stars orbiting near the center, the tremendous energy generated by the core and the shape of most galaxies. The most distant objects detected in the universe are called quasars (qua ...
Chinese astronomy
Astronomy in China has a very long history, with historians indicating that the Chinese were the most persistent and accurate observers of celestial phenomena anywhere in the world before the Arabs. Star names later categorized in the twenty-eight mansions have been found on oracle bones unearthed at Anyang, dating back to the middle Shang Dynasty (Chinese Bronze Age), and the mansion (xiù:宿) system's nucleus seems to have taken shape by the time of the ruler Wu Ding (1339-1281 BC).Detailed records of astronomical observations began during the Warring States period (fourth century BC) and flourished from the Han period onward. Chinese astronomy was equatorial, centered as it was on close observation of circumpolar stars, and was based on different principles from those prevailing in traditional Western astronomy, where heliacal risings and settings of zodiac constellations formed the basic ecliptic framework.Some elements of Indian astronomy reached China with the expansion of Buddhism after the Eastern Han Dynasty (25–220 AD), but the most detailed incorporation of Indian astronomical thought occurred during the Tang Dynasty (618-907), when numerous Indian astronomers took up residence in the Chinese capital, and Chinese scholars, such as the great Tantric Buddhist monk and mathematician Yi Xing, mastered its system. Islamic astronomers collaborated closely with their Chinese colleagues during the Yuan Dynasty, and, after a period of relative decline during the Ming Dynasty, astronomy was revitalized under the stimulus of Western cosmology and technology after the Jesuits established their missions. The telescope was introduced in the seventeenth century. In 1669, the Peking observatory was completely redesigned and refitted under the direction of Ferdinand Verbiest. Today, China continues to be active in astronomy, with many observatories and its own space program.