RR animation
... • Stars that exhibit pulsation periods on the order of a few days to months, are 4–20 times more massive than the Sun, and up to 100,000 times more luminous. • Cepheids are supergiants of spectral class F6 – K2 and their radii change by several million km (30%) in the process. • There exists a well- ...
... • Stars that exhibit pulsation periods on the order of a few days to months, are 4–20 times more massive than the Sun, and up to 100,000 times more luminous. • Cepheids are supergiants of spectral class F6 – K2 and their radii change by several million km (30%) in the process. • There exists a well- ...
Name _________ Date _____________ Period ______ Skills
... _____ 18. Stars are now classified by a. their elements. b. their temperature. c. their age. d. their size. _____ 19. Class O stars, the hottest stars, are a. yellow. b. orange. c. red. d. blue. 20. Early astronomers called the brightest stars in the sky ______________________ stars. 21. What type o ...
... _____ 18. Stars are now classified by a. their elements. b. their temperature. c. their age. d. their size. _____ 19. Class O stars, the hottest stars, are a. yellow. b. orange. c. red. d. blue. 20. Early astronomers called the brightest stars in the sky ______________________ stars. 21. What type o ...
friends of the planetarium newsletter
... alien beauty. Asteroid Lutetia has been a target of interest among astronomers for many years. It is one of the largest asteroids in the solar system and has a strange spectrum of reflected light that doesn't look quite like any other asteroid. This photo was taken at closest approach, just over 300 ...
... alien beauty. Asteroid Lutetia has been a target of interest among astronomers for many years. It is one of the largest asteroids in the solar system and has a strange spectrum of reflected light that doesn't look quite like any other asteroid. This photo was taken at closest approach, just over 300 ...
A Sense of Scale - Young Scientists Journal
... groups or clusters of tens, hundreds or thousands of galaxies together. The Milky Way Galaxy is part of the Virgo Cluster which is 15,000,000 light years across and contains an estimated 1500 galaxies. Beyond this scale we reach Superclusters which, if you can imagine a cluster as being a group of g ...
... groups or clusters of tens, hundreds or thousands of galaxies together. The Milky Way Galaxy is part of the Virgo Cluster which is 15,000,000 light years across and contains an estimated 1500 galaxies. Beyond this scale we reach Superclusters which, if you can imagine a cluster as being a group of g ...
Problem Set #3
... d. What is the mass of the Galaxy contained within R0? e. Do you think this Galaxy is likely to be more or less massive than the Milky Way? 4. You’re still bored in your new galaxy, so you decide to build a large telescope with adaptive optics capable of observing the center of the galaxy. There you ...
... d. What is the mass of the Galaxy contained within R0? e. Do you think this Galaxy is likely to be more or less massive than the Milky Way? 4. You’re still bored in your new galaxy, so you decide to build a large telescope with adaptive optics capable of observing the center of the galaxy. There you ...
The Lives of Stars From Birth Through Middle Age (Chapter 9)
... 1. A helium-3 atom and a helium-4 atom combine to form a beryllium-7 (four protons and three neutrons) and a gamma ray. 2. A beryllium-7 atom captures an electron to become lithium-7 atom (three protons and four neutrons) and a neutrino. 3. The lithium-7 combines with a proton to form two helium-4 a ...
... 1. A helium-3 atom and a helium-4 atom combine to form a beryllium-7 (four protons and three neutrons) and a gamma ray. 2. A beryllium-7 atom captures an electron to become lithium-7 atom (three protons and four neutrons) and a neutrino. 3. The lithium-7 combines with a proton to form two helium-4 a ...
PHYS 175 (2014) Final Examination Name: ___SOLUTION_____
... 5. The spectral classification of a star is closely related to the star’s a) apparent brightness. b) absolute magnitude. c) luminosity. d) surface temperature. e) distance. ...
... 5. The spectral classification of a star is closely related to the star’s a) apparent brightness. b) absolute magnitude. c) luminosity. d) surface temperature. e) distance. ...
Chasing the Pole — Howard L. Cohen
... makes this star’s orbit similar in size to the orbit of Uranus (but much more noncircular). The Hubble Space Telescope finally imaged this third star a few years ago (Hupp et al. 2006). Interestingly, all three stars in this triple system have similar principle spectral classes (Type F) showing they ...
... makes this star’s orbit similar in size to the orbit of Uranus (but much more noncircular). The Hubble Space Telescope finally imaged this third star a few years ago (Hupp et al. 2006). Interestingly, all three stars in this triple system have similar principle spectral classes (Type F) showing they ...
Introduction to Accretion Phenomena in Astrophysics
... • Detached binaries are a kind of binary stars where each component is within its Roche Lobe. No major impact on each other, stars essentially evolve separately. • Semidetached binary stars: one of the components fills its Roche lobe and the other does not. Gas from the surface of the Roche lobe fil ...
... • Detached binaries are a kind of binary stars where each component is within its Roche Lobe. No major impact on each other, stars essentially evolve separately. • Semidetached binary stars: one of the components fills its Roche lobe and the other does not. Gas from the surface of the Roche lobe fil ...
CST Prep- 8th Grade Astronomy
... 32. What color is Mars? __________________. It is this color because it has lots of __________________ on its surface. 33. Mars has a very thin __________________. 34. Satellites (moons) and small planets have little or no atmosphere because they are too small and have insufficient ________________ ...
... 32. What color is Mars? __________________. It is this color because it has lots of __________________ on its surface. 33. Mars has a very thin __________________. 34. Satellites (moons) and small planets have little or no atmosphere because they are too small and have insufficient ________________ ...
Astronomical Distance Determination • etc.
... seen from far away. (They are not main sequence stars). A complication though is that there are two populations of Cepheids and they have different period luminosity ...
... seen from far away. (They are not main sequence stars). A complication though is that there are two populations of Cepheids and they have different period luminosity ...
the california planet survey. i. four new giant exoplanets
... * The host star, HD 13931, is also similar to the Sun in mass (M= 1.02 M⊙) and metallicity. HD 13931 b is one of only four known RV-detected planets with orbital periods longer than 10 yr. The other such planets are all in multi-planet systems. GJ 179 b * Is a Jovian-mass (M sin i = 0.82 MJup ) plan ...
... * The host star, HD 13931, is also similar to the Sun in mass (M= 1.02 M⊙) and metallicity. HD 13931 b is one of only four known RV-detected planets with orbital periods longer than 10 yr. The other such planets are all in multi-planet systems. GJ 179 b * Is a Jovian-mass (M sin i = 0.82 MJup ) plan ...
AST 301 Introduction to Astronomy - University of Texas Astronomy
... Becoming a Red Giant (The complete explanation for how a main-sequence star becomes a red giant is complicated, and I’m not really giving you the whole story. But the conclusion is right. Don’t worry if you don’t follow all of the explanation.) When all of the hydrogen in the core of a main-sequenc ...
... Becoming a Red Giant (The complete explanation for how a main-sequence star becomes a red giant is complicated, and I’m not really giving you the whole story. But the conclusion is right. Don’t worry if you don’t follow all of the explanation.) When all of the hydrogen in the core of a main-sequenc ...
Apparent Motions of Celestial Objects
... The sun’s altitude at noon is highest during the year. The sun’s “apparent path” across the sky is at its longest (greater than 12 hours). ...
... The sun’s altitude at noon is highest during the year. The sun’s “apparent path” across the sky is at its longest (greater than 12 hours). ...
Black Body Radiation and Wien`s Law File
... 3. As the temperature increases λmax moves to the left towards higher frequency. 4. At higher temperatures there is a sharp falling off of radiation at values greater than λmax towards a limiting value in the ultraviolet range which is of very short wavelength but not zero. This is referred to as th ...
... 3. As the temperature increases λmax moves to the left towards higher frequency. 4. At higher temperatures there is a sharp falling off of radiation at values greater than λmax towards a limiting value in the ultraviolet range which is of very short wavelength but not zero. This is referred to as th ...
Basic Observations of the Night Sky
... • It is this 23½ inclination of the Earth's axis which causes the seasons. • It is NOT because we are closer to the Sun in the summer months; in fact, we in the northern hemisphere are actually slightly farther away from the sun during the summer. – Austrailia is slightly closer during their summer ...
... • It is this 23½ inclination of the Earth's axis which causes the seasons. • It is NOT because we are closer to the Sun in the summer months; in fact, we in the northern hemisphere are actually slightly farther away from the sun during the summer. – Austrailia is slightly closer during their summer ...
w 2012-01-13 Stellar Life Cycle
... Emission nebulae are clouds of high temperature gas. The atoms in the cloud are energized by ultraviolet light from a nearby star and emit radiation as they fall back into lower energy states (in much the same way as a neon light). These nebulae are usually red because the predominant emission line ...
... Emission nebulae are clouds of high temperature gas. The atoms in the cloud are energized by ultraviolet light from a nearby star and emit radiation as they fall back into lower energy states (in much the same way as a neon light). These nebulae are usually red because the predominant emission line ...
1b91: answers to problem sheet no 1
... at 650 nm. (i) What observational wave-bands do these peaks occur in? (ii) Which star is hotter and by what factor? (iii) How many more times more energy per unit area does the hotter star radiate per second? (a) Using equation ν= c/λ where c=velocity of light = 3 x 108 m/s and the frequency ν= 200 ...
... at 650 nm. (i) What observational wave-bands do these peaks occur in? (ii) Which star is hotter and by what factor? (iii) How many more times more energy per unit area does the hotter star radiate per second? (a) Using equation ν= c/λ where c=velocity of light = 3 x 108 m/s and the frequency ν= 200 ...
Basic Properties of the Stars
... parallax shifts with respect to the distant background of stars. Tycho Brahe improved positional measures from +/- 10 arc minutes to as good as +/- 1 arc minute, but he could measure no parallaxes. This implied either that the stars were more than 3000 Astronomical Units away, or that the Earth was ...
... parallax shifts with respect to the distant background of stars. Tycho Brahe improved positional measures from +/- 10 arc minutes to as good as +/- 1 arc minute, but he could measure no parallaxes. This implied either that the stars were more than 3000 Astronomical Units away, or that the Earth was ...
27.1: Characteristics of Stars
... Approximately 6000 stars are visible to the unaided eye from earth About 3 billion can be seen through ground-based telescopes Over 1 trillion can be observed from the Hubble Space Telescope The visibility of a star depends on its brightness and its distance from the Earth. Astronomers use two scale ...
... Approximately 6000 stars are visible to the unaided eye from earth About 3 billion can be seen through ground-based telescopes Over 1 trillion can be observed from the Hubble Space Telescope The visibility of a star depends on its brightness and its distance from the Earth. Astronomers use two scale ...
Ursa Minor
Ursa Minor (Latin: ""Smaller She-Bear"", contrasting with Ursa Major), also known as the Little Bear, is a constellation in the northern sky. Like the Great Bear, the tail of the Little Bear may also be seen as the handle of a ladle, hence the name Little Dipper. It was one of the 48 constellations listed by the 2nd-century astronomer Ptolemy, and remains one of the 88 modern constellations. Ursa Minor has traditionally been important for navigation, particularly by mariners, due to Polaris being the North Star.Polaris, the brightest star in the constellation, is a yellow-white supergiant and the brightest Cepheid variable star in the night sky, ranging from apparent magnitude 1.97 to 2.00. Beta Ursae Minoris, also known as Kochab, is an aging star that has swollen and cooled to become an orange giant with an apparent magnitude of 2.08, only slightly fainter than Polaris. Kochab and magnitude 3 Gamma Ursae Minoris have been called the ""guardians of the pole star"". Planets have been detected orbiting four of the stars, including Kochab. The constellation also contains an isolated neutron star—Calvera—and H1504+65, the hottest white dwarf yet discovered with a surface temperature of 200,000 K.