29.1 Directed Reading Guide
... _____ 5. What do scientists use to break up the sun’s light into a spectrum? a. a spectrometer b. a spectrograph c. a spectrareader d. a light graphometer _____ 6. What causes dark lines to form in the spectra of stars? a. Gases in the stars’ interiors emit specific wavelengths of light. b. Gases in ...
... _____ 5. What do scientists use to break up the sun’s light into a spectrum? a. a spectrometer b. a spectrograph c. a spectrareader d. a light graphometer _____ 6. What causes dark lines to form in the spectra of stars? a. Gases in the stars’ interiors emit specific wavelengths of light. b. Gases in ...
How many stars are in the Milky Way Galaxy?
... 1: Draw and label diagrams of the Milky Way from top and side views, showing the major components. Indicate the approximate dimensions of the components and note the location of the Sun in each diagram. 2: Describe the galactic distribution of general interstellar material, nebulae, and open and glo ...
... 1: Draw and label diagrams of the Milky Way from top and side views, showing the major components. Indicate the approximate dimensions of the components and note the location of the Sun in each diagram. 2: Describe the galactic distribution of general interstellar material, nebulae, and open and glo ...
Westerlund 1 : A Super-Star Cluster within the Milky Way
... We present optical and IR photometric and spectroscopic observations of the young open cluster Westerlund 1 that indicate it is the first Super Star Cluster identified in the Milky Way. Wd1 hosts a rich population of OB supergiants, Wolf-Rayet stars, Luminous Blue Variables, Yellow Hypergiants and R ...
... We present optical and IR photometric and spectroscopic observations of the young open cluster Westerlund 1 that indicate it is the first Super Star Cluster identified in the Milky Way. Wd1 hosts a rich population of OB supergiants, Wolf-Rayet stars, Luminous Blue Variables, Yellow Hypergiants and R ...
The Case against Copernicus
... be extremely far away. This in turn implies that they should be absurdly large—hun dreds of times bigger than the sun (bottom). Copernicans could not explain away the anomalous data without appeals to divine intervention. In reality, the stars are far away, but their apparent width is an illusion ...
... be extremely far away. This in turn implies that they should be absurdly large—hun dreds of times bigger than the sun (bottom). Copernicans could not explain away the anomalous data without appeals to divine intervention. In reality, the stars are far away, but their apparent width is an illusion ...
the constellations of the zodiac
... 3. History of the zodiac The division of the ecliptic into the zodiacal signs originates from the Chaldean people (Babylonians) around 500 BC. This division of the ecliptic into twelve equal zones of celestial longitude ends up being the first known celestial coordinates system. The Babylonian calen ...
... 3. History of the zodiac The division of the ecliptic into the zodiacal signs originates from the Chaldean people (Babylonians) around 500 BC. This division of the ecliptic into twelve equal zones of celestial longitude ends up being the first known celestial coordinates system. The Babylonian calen ...
Chapter 12 Lecture 2
... • A low-mass star spends most of its life generating energy by fusing hydrogen in its core. Then it becomes a red giant, with a hydrogen shell burning around an inert helium core. Next comes helium core burning, followed by doubleshell burning of hydrogen and helium shells around an inert carbon cor ...
... • A low-mass star spends most of its life generating energy by fusing hydrogen in its core. Then it becomes a red giant, with a hydrogen shell burning around an inert helium core. Next comes helium core burning, followed by doubleshell burning of hydrogen and helium shells around an inert carbon cor ...
Astronomy and the Coal Age of Alabama
... The Big Dipper would have looked virtually the same to the ancient Egyptians, but 100,000 years ago it looked different. It will further lose its familiar shape in the future. Its 7 bright stars are not all at the same distance. This kind of thing can’t be extrapolated too far backward or forward i ...
... The Big Dipper would have looked virtually the same to the ancient Egyptians, but 100,000 years ago it looked different. It will further lose its familiar shape in the future. Its 7 bright stars are not all at the same distance. This kind of thing can’t be extrapolated too far backward or forward i ...
Weighing a Black Hole
... elliptical orbits, semi-major axis, a) for each star using the small angle approximation: a=θ xd 3. Given d = 8000 parsecs, solve for a, length of semi-major axis, and record. 4. Now we can calculate the mass that is responsible for these orbits using Kepler’s 3rd law: M = a3/P2 You will obtain 4 di ...
... elliptical orbits, semi-major axis, a) for each star using the small angle approximation: a=θ xd 3. Given d = 8000 parsecs, solve for a, length of semi-major axis, and record. 4. Now we can calculate the mass that is responsible for these orbits using Kepler’s 3rd law: M = a3/P2 You will obtain 4 di ...
On the nature of early-type emission line objects in NGC6611
... metallicity (Schaller et al. 1992). A part of stars in the sample (mainly the massive stars) are young and are close to the ZAMS. However, the analysis of our results demonstrates that a group (intermediate mass stars) of our NGC6611 targets have an age too old for the age of this star-formation reg ...
... metallicity (Schaller et al. 1992). A part of stars in the sample (mainly the massive stars) are young and are close to the ZAMS. However, the analysis of our results demonstrates that a group (intermediate mass stars) of our NGC6611 targets have an age too old for the age of this star-formation reg ...
Astronomy - Dallas ISD
... of the Earth-Moon system, about how far apart should they be placed? A ...
... of the Earth-Moon system, about how far apart should they be placed? A ...
Astronomy 8 - Dallas ISD
... of the Earth-Moon system, about how far apart should they be placed? A ...
... of the Earth-Moon system, about how far apart should they be placed? A ...
ppt document
... d2: Does the sun always rise exactly due East and set exactly due West? No! The sun rises North of due East and sets North of due West in the spring and summer, and it rises South of due East and Sets South of due West in the fall and winter. It only rises due East on the first day of spring and fir ...
... d2: Does the sun always rise exactly due East and set exactly due West? No! The sun rises North of due East and sets North of due West in the spring and summer, and it rises South of due East and Sets South of due West in the fall and winter. It only rises due East on the first day of spring and fir ...
Research proposal uploaded for ESO fellowship
... How is the star formation history of galaxies affected by supernovae feedback? Is this feedback powerful enough as to drive the global star formation rate decline of the universe? Supernova feedback represents a long standing problem in galaxy formation model. Currently, toy models are used to treat ...
... How is the star formation history of galaxies affected by supernovae feedback? Is this feedback powerful enough as to drive the global star formation rate decline of the universe? Supernova feedback represents a long standing problem in galaxy formation model. Currently, toy models are used to treat ...
Black-Body SNR Formulation of Astronomical Camera
... where m is the brightness magnitude assigned to a star observed from Earth, f (·) is the mean spectral flux density at top of Earth’s atmosphere averaged over a defined band and Q(·) is the normalizing constant for that band [8]. We will not go into more details about astronomical magnitude systems ...
... where m is the brightness magnitude assigned to a star observed from Earth, f (·) is the mean spectral flux density at top of Earth’s atmosphere averaged over a defined band and Q(·) is the normalizing constant for that band [8]. We will not go into more details about astronomical magnitude systems ...
The Missing Mass
... • The orbits in spiral galaxies are not quite circles – they are ellipses. These ellipses are slightly tilted with respect to each other. ...
... • The orbits in spiral galaxies are not quite circles – they are ellipses. These ellipses are slightly tilted with respect to each other. ...
S1-4-05 - Seasonal Constelallations - Lesson
... - The Earth rotates from west to east, but the constellations appear to move from east to west, or “backwards” in direction from the real rotation of Earth. - Constellations appear to “rise” when the Earth has rotated so that we can see the different constellations, and appear to “set” when the Eart ...
... - The Earth rotates from west to east, but the constellations appear to move from east to west, or “backwards” in direction from the real rotation of Earth. - Constellations appear to “rise” when the Earth has rotated so that we can see the different constellations, and appear to “set” when the Eart ...
Constellation Packet - Mr. Jenkins` Classroom
... It is believed that this constellation was first perceived by the egyptians. They associated its rising with the swelling of the nile, and named the constellation Sirius which represented a big dog. They observed that when Sirius became visible in the east just before the dawn, the overflowing of th ...
... It is believed that this constellation was first perceived by the egyptians. They associated its rising with the swelling of the nile, and named the constellation Sirius which represented a big dog. They observed that when Sirius became visible in the east just before the dawn, the overflowing of th ...
Rotation
... envelope may also make the star more difficult to explode because of fall back. 3) Mass loss sets an upper bound to the luminosity of red supergiants. This limit is metallicity dependent. For solar metallicity, the maximum mass star that dies with a hydrogen envelope attached is about 35 solar masse ...
... envelope may also make the star more difficult to explode because of fall back. 3) Mass loss sets an upper bound to the luminosity of red supergiants. This limit is metallicity dependent. For solar metallicity, the maximum mass star that dies with a hydrogen envelope attached is about 35 solar masse ...
Solution
... False. By Wien's Law, since red is a longer wavelength than yellow, the surface temperature of the red one must be smaller. But by Stefan-Boltzmann's Law, its luminosity/area must also be smaller, and they are the same size. So the red one is less luminous. 3. ( T F ) Using parallax, astronomers can ...
... False. By Wien's Law, since red is a longer wavelength than yellow, the surface temperature of the red one must be smaller. But by Stefan-Boltzmann's Law, its luminosity/area must also be smaller, and they are the same size. So the red one is less luminous. 3. ( T F ) Using parallax, astronomers can ...
Are We Alone in the Universe?
... Until about 20 years ago, we only knew about 8 (9 then) planets! ✤ Now we know of nearly 2,000! Some estimates put the number of Earth-like planets in habitable zones at 20% of all stars! ✤ 400 billion stars in the Milky Way x 20% = 80 billion potentially habitable planets! Statistically, the answer ...
... Until about 20 years ago, we only knew about 8 (9 then) planets! ✤ Now we know of nearly 2,000! Some estimates put the number of Earth-like planets in habitable zones at 20% of all stars! ✤ 400 billion stars in the Milky Way x 20% = 80 billion potentially habitable planets! Statistically, the answer ...
Slides
... with f in erg/s/cm2/Hz. In this system the formalism on the previous page can be used but now with a reference spectrum that has F⌫ = const Finally the Hubble Space Telescope data are often quoted in ST magnitudes which are done with a reference spectrum that has F = const ...
... with f in erg/s/cm2/Hz. In this system the formalism on the previous page can be used but now with a reference spectrum that has F⌫ = const Finally the Hubble Space Telescope data are often quoted in ST magnitudes which are done with a reference spectrum that has F = const ...
Corvus (constellation)
Corvus is a small constellation in the Southern Celestial Hemisphere. Its name comes from the Latin word ""raven"" or ""crow"". It includes only 11 stars with brighter than 4.02 magnitudes. One of the 48 constellations listed by the 2nd-century astronomer Ptolemy, it remains one of the 88 modern constellations. The four brightest stars, Gamma, Delta, Epsilon, and Beta Corvi from a distinctive quadrilateral in the night sky. The young star Eta Corvi has been found to have two debris disks.