Prep/Review Questions - Faculty Web Sites at the University
... Why does even a small telescope reveal many more stars than are visible to the naked eye? You have three eyepieces with focal lengths of 200, 100, and 20 mm to use with your telescope, which has a focal length of 1800 mm. Which eyepiece will give you an image with 90 power magnification? Which eyepi ...
... Why does even a small telescope reveal many more stars than are visible to the naked eye? You have three eyepieces with focal lengths of 200, 100, and 20 mm to use with your telescope, which has a focal length of 1800 mm. Which eyepiece will give you an image with 90 power magnification? Which eyepi ...
lecture22
... The Sun will expand and cool again, becoming a red (super) giant. Earth, cooked to a cinder during the red giant phase, will be engulfed and vaporized within the Sun. At the end of this stage, the Sun’s core will consist mostly of carbon, with a little ...
... The Sun will expand and cool again, becoming a red (super) giant. Earth, cooked to a cinder during the red giant phase, will be engulfed and vaporized within the Sun. At the end of this stage, the Sun’s core will consist mostly of carbon, with a little ...
January 2013 - astronomy for beginners
... where there is a vertical line of stars forming his sword electron jumps back to its original orbit and emits a flash of (hanging from his belt). About half way down the line light. The colour of this light is unique to the type of atom of stars making up Orion’s sword is a hazy patch that that has ...
... where there is a vertical line of stars forming his sword electron jumps back to its original orbit and emits a flash of (hanging from his belt). About half way down the line light. The colour of this light is unique to the type of atom of stars making up Orion’s sword is a hazy patch that that has ...
H-R Diagrams
... 2. Some stars are in the middle (fairly hot) but pretty dim. What must they be like? very small They’re giving out all colours. So they are…? white dwarfs ...
... 2. Some stars are in the middle (fairly hot) but pretty dim. What must they be like? very small They’re giving out all colours. So they are…? white dwarfs ...
Separating Stars and Galaxies Based on Color
... If a high resolution spectrum is available for an object, star/galaxy classification is almost always trivial, as spectral features unique to stars or galaxies are easily identifiable. However, due to limitations in telescope time and current detector technology, we do not have a spectrum for each o ...
... If a high resolution spectrum is available for an object, star/galaxy classification is almost always trivial, as spectral features unique to stars or galaxies are easily identifiable. However, due to limitations in telescope time and current detector technology, we do not have a spectrum for each o ...
Infinity Express
... Hand out a galaxy page to each student. Explain that galaxies in the Universe have different shapes and sizes and that our own galaxy – the Milky Way – is quite an average galaxy! Introduce three shapes of galaxies: o Spiral – shaped like a pinwheel o Barred Spiral – shaped like a pinwheel, but with ...
... Hand out a galaxy page to each student. Explain that galaxies in the Universe have different shapes and sizes and that our own galaxy – the Milky Way – is quite an average galaxy! Introduce three shapes of galaxies: o Spiral – shaped like a pinwheel o Barred Spiral – shaped like a pinwheel, but with ...
Lecture 12, PPT version
... E = mc2 There is a tremendous amount of energy associated with mass! ...
... E = mc2 There is a tremendous amount of energy associated with mass! ...
Assignment 7 - Department of Physics and Astronomy
... ____ 31. A star that is quite hot and has a very small radius compared to most stars is called a. a mainsequence star b. an Otype star c. a red giant d. a white dwarf e. an Mtype star ____ 32. The apparent brightness of stars in general tells us nothing about their distances (i.e. we cannot assum ...
... ____ 31. A star that is quite hot and has a very small radius compared to most stars is called a. a mainsequence star b. an Otype star c. a red giant d. a white dwarf e. an Mtype star ____ 32. The apparent brightness of stars in general tells us nothing about their distances (i.e. we cannot assum ...
Things to know: This meant as a guide to what you should know. I
... What are voids? (there is no dark matter in voids!!). Be able to recognize in an inertial reference frames. The speed of light is the same for all inertial reference frames. What unusual distortions in time and space are experienced when one moves at speeds near the speed of light? What is gravity i ...
... What are voids? (there is no dark matter in voids!!). Be able to recognize in an inertial reference frames. The speed of light is the same for all inertial reference frames. What unusual distortions in time and space are experienced when one moves at speeds near the speed of light? What is gravity i ...
UNIT VIII/B: THE EARTH IN SPACE – STARS AND GALAXIES
... e. Dark matter is material that is believed to make up more than 90% of the mass of the universe, but is not readily visible because it neither emits nor reflects electromagnetic radiation, such as light or radio signals. Its composition is unknown. It can be detected by its gravitational effect on ...
... e. Dark matter is material that is believed to make up more than 90% of the mass of the universe, but is not readily visible because it neither emits nor reflects electromagnetic radiation, such as light or radio signals. Its composition is unknown. It can be detected by its gravitational effect on ...
slides - Department of Physics and Astronomy
... Hipparchus’ star classification became popular with later astronomers and they kept using his system of 1st to 6th (magnitude) for almost two millennia. ...
... Hipparchus’ star classification became popular with later astronomers and they kept using his system of 1st to 6th (magnitude) for almost two millennia. ...
Episode 14: Planetary paths-2
... did not match with the positions given in the almanacs; they were off by several days. This was a turning point in Tycho’s life; he decided to take upon himself the task of making accurate observations of the sky to correct the existing tables. And that involved years of dedicated observation from a ...
... did not match with the positions given in the almanacs; they were off by several days. This was a turning point in Tycho’s life; he decided to take upon himself the task of making accurate observations of the sky to correct the existing tables. And that involved years of dedicated observation from a ...
Star formation - Grosse Pointe Public School System
... achieve high enough temperatures and pressures in their cores. • These “wanna-be” stars still glow red from light generated due to gravitational contraction. They are known as brown dwarfs, but aren’t really brown! • How does gravity create heat? When a gas is compressed, it converts some of its kin ...
... achieve high enough temperatures and pressures in their cores. • These “wanna-be” stars still glow red from light generated due to gravitational contraction. They are known as brown dwarfs, but aren’t really brown! • How does gravity create heat? When a gas is compressed, it converts some of its kin ...
EX - Uplift North Hills Prep
... (i) Outline this method. (ii) Modern techniques enable the measurement from Earth’s surface of stellar parallax angles as small as 5.0 × 10–3 arcsecond. Calculate the maximum distance that can be measured using the method of stellar parallax. ...
... (i) Outline this method. (ii) Modern techniques enable the measurement from Earth’s surface of stellar parallax angles as small as 5.0 × 10–3 arcsecond. Calculate the maximum distance that can be measured using the method of stellar parallax. ...
MSci Astrophysics 210PHY412 - Queen's University Belfast
... The existence of a superwind is suggested by two independent variables. The high density observed within the observed shells in stellar ejecta, and relative paucity of very bright stars on the AGB. The latter (Prialnik P. 161) comes from the number of AGB stars expected compared to observed is >10. ...
... The existence of a superwind is suggested by two independent variables. The high density observed within the observed shells in stellar ejecta, and relative paucity of very bright stars on the AGB. The latter (Prialnik P. 161) comes from the number of AGB stars expected compared to observed is >10. ...
L10 - QUB Astrophysics Research Centre
... The existence of a superwind is suggested by two independent variables. The high density observed within the observed shells in stellar ejecta, and relative paucity of very bright stars on the AGB. The latter (Prialnik P. 161) comes from the number of AGB stars expected compared to observed is >10. ...
... The existence of a superwind is suggested by two independent variables. The high density observed within the observed shells in stellar ejecta, and relative paucity of very bright stars on the AGB. The latter (Prialnik P. 161) comes from the number of AGB stars expected compared to observed is >10. ...
Neutron stars and quark stars - Goethe
... • super-Eddington luminosity from bare, hot strange stars (Page and Usov, 2002) • conversion of neutron stars to strange stars (explosive events!) ...
... • super-Eddington luminosity from bare, hot strange stars (Page and Usov, 2002) • conversion of neutron stars to strange stars (explosive events!) ...
Astronomy 10 - UC Berkeley Astronomy w
... (a) Yes. Since the spectral type is mainly determined by the temperature, if the stars have the same spectral type, then they have similar temperatures. (b) No. Just knowing the spectral type is not enough to know the difference in size. If one knows the relative intrinsic luminosity of the stars, t ...
... (a) Yes. Since the spectral type is mainly determined by the temperature, if the stars have the same spectral type, then they have similar temperatures. (b) No. Just knowing the spectral type is not enough to know the difference in size. If one knows the relative intrinsic luminosity of the stars, t ...
Lecture 3
... • The parallax effect is the apparent motion of a nearby object compared to distant background objects because of a change in viewing angle. • Put a finger in front of your nose and watch it move with respect to the back of the room as you look through one eye and then the other. ...
... • The parallax effect is the apparent motion of a nearby object compared to distant background objects because of a change in viewing angle. • Put a finger in front of your nose and watch it move with respect to the back of the room as you look through one eye and then the other. ...
Hipparcos
Hipparcos was a scientific satellite of the European Space Agency (ESA), launched in 1989 and operated until 1993. It was the first space experiment devoted to precision astrometry, the accurate measurement of the positions of celestial objects on the sky. This permitted the accurate determination of proper motions and parallaxes of stars, allowing a determination of their distance and tangential velocity. When combined with radial-velocity measurements from spectroscopy, this pinpointed all six quantities needed to determine the motion of stars. The resulting Hipparcos Catalogue, a high-precision catalogue of more than 118,200 stars, was published in 1997. The lower-precision Tycho Catalogue of more than a million stars was published at the same time, while the enhanced Tycho-2 Catalogue of 2.5 million stars was published in 2000. Hipparcos ' follow-up mission, Gaia, was launched in 2013.The word ""Hipparcos"" is an acronym for High precision parallax collecting satellite and also a reference to the ancient Greek astronomer Hipparchus of Nicaea, who is noted for applications of trigonometry to astronomy and his discovery of the precession of the equinoxes.