Slide 1
... Evolution beyond the Red Giant • L does not increase at the onset of the He-flash itself since the central region of the core is quite opaque • The H-burning shell is slowly extinguished and L decreases, even as the star shrinks and temperature rises; the star moves leftward along a nearly Hori ...
... Evolution beyond the Red Giant • L does not increase at the onset of the He-flash itself since the central region of the core is quite opaque • The H-burning shell is slowly extinguished and L decreases, even as the star shrinks and temperature rises; the star moves leftward along a nearly Hori ...
Lecture 11, PPT version
... (Astronomers like to classify things / put them in bins) The letters O, B, A, F, G, K, M are called the “spectral type” of the star and describe the appearance of the spectrum (i.e., strong helium lines but weak hydrogen lines, strong hydrogen lines but no helium lines). ...
... (Astronomers like to classify things / put them in bins) The letters O, B, A, F, G, K, M are called the “spectral type” of the star and describe the appearance of the spectrum (i.e., strong helium lines but weak hydrogen lines, strong hydrogen lines but no helium lines). ...
Ch. 28 Test Topics
... -Know that the distances between stars are 10,000 times greater than the distances between planets. -Know that the distances between galaxies are a million times greater than the distances between stars. -Know what Doppler Shift is and how the Doppler shift depends on distance between listener and o ...
... -Know that the distances between stars are 10,000 times greater than the distances between planets. -Know that the distances between galaxies are a million times greater than the distances between stars. -Know what Doppler Shift is and how the Doppler shift depends on distance between listener and o ...
Exam 03
... A) Brightness: Higher luminosity class indicates a higher apparent magnitude, which actually means a dimmer star as viewed from Earth. B) Temperature: Stars with a higher luminosity class have a higher temperature. C) Mass: The higher the luminosity class, the larger the mass of the star. D) Size: L ...
... A) Brightness: Higher luminosity class indicates a higher apparent magnitude, which actually means a dimmer star as viewed from Earth. B) Temperature: Stars with a higher luminosity class have a higher temperature. C) Mass: The higher the luminosity class, the larger the mass of the star. D) Size: L ...
ASTR 101 Deming EXAM II November 18 OFFICE HRS in CSS
... Electromagnetic radiation—basic properties of light, wavelength & photon energy gamma rays, x rays, ultraviolet, visible, infrared, radio short wavelength--------------------------->long wavelength great photon energy------------------>less photon energy Spectra–handout on continuous, emission, abso ...
... Electromagnetic radiation—basic properties of light, wavelength & photon energy gamma rays, x rays, ultraviolet, visible, infrared, radio short wavelength--------------------------->long wavelength great photon energy------------------>less photon energy Spectra–handout on continuous, emission, abso ...
Star Show FACILITATOR NOTES
... closely matches the Sun’s spectrum must have a temperature very close to the temperature at the Sun’s visible surface—well over 5000°C. Except for specialized lights used in photography, most real light filaments operate at a lower temperature (around 2500°C) which gives a more reddish-orange color ...
... closely matches the Sun’s spectrum must have a temperature very close to the temperature at the Sun’s visible surface—well over 5000°C. Except for specialized lights used in photography, most real light filaments operate at a lower temperature (around 2500°C) which gives a more reddish-orange color ...
Antares - Emmi
... Antares is in the constellation scorpio The Scorpio constellations story is an ancient Greek myth. Orion the hunter was the best hunter in the world and the most handsome man. He bragged that he would kill every animal on Earth. Apollo guardian of the cows pleaded with Hera the queen of the gods t ...
... Antares is in the constellation scorpio The Scorpio constellations story is an ancient Greek myth. Orion the hunter was the best hunter in the world and the most handsome man. He bragged that he would kill every animal on Earth. Apollo guardian of the cows pleaded with Hera the queen of the gods t ...
Study Guide
... Law of Gravity Equation of State (“gas law”) Principle of Hydrostatic Equilibrium Source of Energy (e.g., Nuclear Fusion) Movement of Energy through star ...
... Law of Gravity Equation of State (“gas law”) Principle of Hydrostatic Equilibrium Source of Energy (e.g., Nuclear Fusion) Movement of Energy through star ...
Jul - Wadhurst Astronomical Society
... We looked at different stars compared with our Sun. Two particular stars in the constellation of Orion are good examples. Rigel is the brightest in the constellation but compared in size, red Betelgeuse is by far the largest. We were told that Betelgeuse is predicted to become a super-nova soon and ...
... We looked at different stars compared with our Sun. Two particular stars in the constellation of Orion are good examples. Rigel is the brightest in the constellation but compared in size, red Betelgeuse is by far the largest. We were told that Betelgeuse is predicted to become a super-nova soon and ...
- Lowell Observatory
... We checked the old observations obtained between 1955 and 1962 in Radcliff Observatory, South Africa. Fig. 2 below shows the comparison between the spectra obtained in 1961 and 2005. The similarity is striking. At that time, star A was a WN6 star as it is now. We do not see any absorption lines and ...
... We checked the old observations obtained between 1955 and 1962 in Radcliff Observatory, South Africa. Fig. 2 below shows the comparison between the spectra obtained in 1961 and 2005. The similarity is striking. At that time, star A was a WN6 star as it is now. We do not see any absorption lines and ...
Astronomy 104: Homework Set 6 Due: Wednesday, April 1, 2015
... Earth. Use the relation between brightness (flux), luminosity and distance (see Destination 7) to determine the ratio of the distance to M 31 and the distance of the LMC? If the LMC is 50 kpc distant, how far is M 31 from Earth? Is your result with 10% of the value for the distance of M31 given in D ...
... Earth. Use the relation between brightness (flux), luminosity and distance (see Destination 7) to determine the ratio of the distance to M 31 and the distance of the LMC? If the LMC is 50 kpc distant, how far is M 31 from Earth? Is your result with 10% of the value for the distance of M31 given in D ...
Introduction to Celestial Spheres (Professor Powerpoint)
... Looking toward the south you’ll see stars rise in the south east, go to the highest point and set in the southwest, a shorter arc across the sky. ...
... Looking toward the south you’ll see stars rise in the south east, go to the highest point and set in the southwest, a shorter arc across the sky. ...
AST101_lect_13
... • Stars generate luminosity through fusion of H into He • The lifetime of a star is proportional to the amount of fuel it has (mass) divided by the rate at which it expends the fuel (luminosity) • The lifetime τ ~ M/L ~ M-2 (because L ~ M3) ...
... • Stars generate luminosity through fusion of H into He • The lifetime of a star is proportional to the amount of fuel it has (mass) divided by the rate at which it expends the fuel (luminosity) • The lifetime τ ~ M/L ~ M-2 (because L ~ M3) ...
AST101 Lecture 13 The Lives of the Stars
... • Stars generate luminosity through fusion of H into He • The lifetime of a star is proportional to the amount of fuel it has (mass) divided by the rate at which it expends the fuel (luminosity) • The lifetime τ ~ M/L ~ M-2 (because L ~ M3) • τ ranges from 4x106 years for O stars to ~1012 years ...
... • Stars generate luminosity through fusion of H into He • The lifetime of a star is proportional to the amount of fuel it has (mass) divided by the rate at which it expends the fuel (luminosity) • The lifetime τ ~ M/L ~ M-2 (because L ~ M3) • τ ranges from 4x106 years for O stars to ~1012 years ...
Ch 19 Directed Reading
... 21. What is the magnitude of Sirius, the brightest star in the night sky? a. 1.4 ...
... 21. What is the magnitude of Sirius, the brightest star in the night sky? a. 1.4 ...
Diapositiva 1 - Yale University
... Mission facts Darwin will use a flotilla of six space telescopes, each of which will be at least 1.5 metres in diameter. They will work together to scan the nearby Universe, looking for signs of life on Earth-like planets. At optical wavelengths, a star outshines an Earth-like planet by a bill ...
... Mission facts Darwin will use a flotilla of six space telescopes, each of which will be at least 1.5 metres in diameter. They will work together to scan the nearby Universe, looking for signs of life on Earth-like planets. At optical wavelengths, a star outshines an Earth-like planet by a bill ...
Stellar Remnants
... • An object as big as the Sun with a onemonth rotation period will rotate more than 1000 times a second if squeezed down to the size of a neutron star – This happens when a massive star’s iron core collapses – magnetic field beams radiation energy in ...
... • An object as big as the Sun with a onemonth rotation period will rotate more than 1000 times a second if squeezed down to the size of a neutron star – This happens when a massive star’s iron core collapses – magnetic field beams radiation energy in ...
Astrophysics by Daniel Yang
... Absorption spectra are produced by cool non-luminous gases placed in front of a source of continuous spectra. The gas absorbs certain frequencies and re-emits them in all directions, leaving the spectrum deficient in those wavelengths. The frequencies absorbed are identical to the frequencies it wou ...
... Absorption spectra are produced by cool non-luminous gases placed in front of a source of continuous spectra. The gas absorbs certain frequencies and re-emits them in all directions, leaving the spectrum deficient in those wavelengths. The frequencies absorbed are identical to the frequencies it wou ...
Spring Constellations
... centaur’s front hooves, Rigil Kentaurus and Hadar, also called ά- and β-Centauri. Our closest neighbor, Proxima Centauri, a red dwarf star 4 LY away, is due south of alpha Centauri. It’s so faint that it can’t be seen with the naked eye. It’s only about 5 times larger than the earth. ...
... centaur’s front hooves, Rigil Kentaurus and Hadar, also called ά- and β-Centauri. Our closest neighbor, Proxima Centauri, a red dwarf star 4 LY away, is due south of alpha Centauri. It’s so faint that it can’t be seen with the naked eye. It’s only about 5 times larger than the earth. ...
Star formation - Grosse Pointe Public School System
... • Stars are “born” when the core gets hot enough to begin nuclear fusion. • When fusion begins, its outward push generates enough pressure to stop gravitational contraction of the forming star and its size stabilizes. This is called hydrostatic equilibrium. • This balance of fusion vs. gravitational ...
... • Stars are “born” when the core gets hot enough to begin nuclear fusion. • When fusion begins, its outward push generates enough pressure to stop gravitational contraction of the forming star and its size stabilizes. This is called hydrostatic equilibrium. • This balance of fusion vs. gravitational ...
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.