Stellar Continua
... Using the CTIO 4-m telescope, an astronomer obtained 100 photons per A at 5480 A in a one hour exposure. Again assuming an overall efficiency of 10%, what was the magnitude of the star if B-V=0? ...
... Using the CTIO 4-m telescope, an astronomer obtained 100 photons per A at 5480 A in a one hour exposure. Again assuming an overall efficiency of 10%, what was the magnitude of the star if B-V=0? ...
Beginning of the Universe Classwork Name: 6th Grade PSI Science
... Artist's idea of a black hole, with gas and dust swirling rapidly around it before being pulled in by its powerful gravitational field. You can't really see the black hole itself. Black holes are not really holes at all. They are the opposite of empty! Black holes have the most matter stuffed into t ...
... Artist's idea of a black hole, with gas and dust swirling rapidly around it before being pulled in by its powerful gravitational field. You can't really see the black hole itself. Black holes are not really holes at all. They are the opposite of empty! Black holes have the most matter stuffed into t ...
ted_2012_power_of_design
... history. Crucial to the success of replacing the east span of the San Francisco–Oakland Bay Bridge was the ability to communicate to the general public how the world’s largest self-anchored suspension bridge would reshape the surrounding landscape. Engineering, manufacturing, and construction data w ...
... history. Crucial to the success of replacing the east span of the San Francisco–Oakland Bay Bridge was the ability to communicate to the general public how the world’s largest self-anchored suspension bridge would reshape the surrounding landscape. Engineering, manufacturing, and construction data w ...
This is a preview of the published version of the quiz
... - The first stars formed inside dark matter mini-halos that had about 1 million solar ...
... - The first stars formed inside dark matter mini-halos that had about 1 million solar ...
Outer Space 2 - World of Teaching
... http://www.worldofteaching.com is home to over a thousand powerpoints submitted by teachers. This is a completely free site and requires no registration. Please visit and I hope it will help in your teaching. ...
... http://www.worldofteaching.com is home to over a thousand powerpoints submitted by teachers. This is a completely free site and requires no registration. Please visit and I hope it will help in your teaching. ...
An absence of ex-companion stars in the type Ia supernova remnant
... remnant has been attempted only once14, for Tycho’s supernova of 1572. A particular G-type subgiant star has been identified as being the ex-companion: if this is correct, it would point to a recurrent nova as the progenitor for Tycho’s supernova14. Several concerns have been raised15,17 about this ...
... remnant has been attempted only once14, for Tycho’s supernova of 1572. A particular G-type subgiant star has been identified as being the ex-companion: if this is correct, it would point to a recurrent nova as the progenitor for Tycho’s supernova14. Several concerns have been raised15,17 about this ...
The Hubble Law
... are incorrectly called ‘island universes’ themselves. Such galaxies typically contain 100 billion stars each. Also, about 100 billion distinct galaxies are known to exist. Thus there are presently known about 1022 (10 billion trillion) stars in the visible universe. A second contribution from Hubble ...
... are incorrectly called ‘island universes’ themselves. Such galaxies typically contain 100 billion stars each. Also, about 100 billion distinct galaxies are known to exist. Thus there are presently known about 1022 (10 billion trillion) stars in the visible universe. A second contribution from Hubble ...
Untitled
... A small telescope will show the disk of Jupiter with its four bright 'Galilean' moons lined up on each side. Binoculars, held steady, will sometimes show one or two moons looking like faint stars close to the planet. Jupiter is 670 million km away mid-month. Jupiter is the biggest planet by far. Its ...
... A small telescope will show the disk of Jupiter with its four bright 'Galilean' moons lined up on each side. Binoculars, held steady, will sometimes show one or two moons looking like faint stars close to the planet. Jupiter is 670 million km away mid-month. Jupiter is the biggest planet by far. Its ...
COMETARY PARALLAX
... trigonometry methods (not discussed). Though applicable to some planets and our Moon, the technique will be demonstrated with comets on close approach (~1 au). This is useful for planned coordinated viewing/photography and for a classroom experiment to determine distance of approach. The technique c ...
... trigonometry methods (not discussed). Though applicable to some planets and our Moon, the technique will be demonstrated with comets on close approach (~1 au). This is useful for planned coordinated viewing/photography and for a classroom experiment to determine distance of approach. The technique c ...
Images
... needs to be measured are the quantities on the left. The light profile (after deprojection) gives n, and stellar spectra yield Vrot and r (again, after appropriate deprojection). The most challenging parameter is , the anisotropy parameter. For a non-rotating galaxy, the third term is zero (Vrot ...
... needs to be measured are the quantities on the left. The light profile (after deprojection) gives n, and stellar spectra yield Vrot and r (again, after appropriate deprojection). The most challenging parameter is , the anisotropy parameter. For a non-rotating galaxy, the third term is zero (Vrot ...
Laboratory Procedure (Word Format)
... point west) back to 360o (cardinal point north), where all cardinal points are on the horizon. Given the altitude and azimuth of an object then allows you to locate it in the sky. As we have seen from the previous exercise, the position of the stars change with time so an object's altitude and azimu ...
... point west) back to 360o (cardinal point north), where all cardinal points are on the horizon. Given the altitude and azimuth of an object then allows you to locate it in the sky. As we have seen from the previous exercise, the position of the stars change with time so an object's altitude and azimu ...
classifying stars
... The brightness of a star depends on its size, temperature and distance from the earth. Some stars appear brighter to us on earth because they are much closer than others, astronomers call this apparent magnitude (HOW BRIGHT A STAR APPEARS.) However, if astronomers could take two stars and place them ...
... The brightness of a star depends on its size, temperature and distance from the earth. Some stars appear brighter to us on earth because they are much closer than others, astronomers call this apparent magnitude (HOW BRIGHT A STAR APPEARS.) However, if astronomers could take two stars and place them ...
Dark Matter - Berkeley Center for Cosmological Physics
... 8) Dark Matter is dark because: a) it only acts through gravity b) it is invisible since it doesn’t absorb or reflect light c) it only gives off black light d) it is baryonic in nature 9) Dark Matter explains: a) the 80-90 % of “missing” mass in the Universe b) was important in star & galaxy formati ...
... 8) Dark Matter is dark because: a) it only acts through gravity b) it is invisible since it doesn’t absorb or reflect light c) it only gives off black light d) it is baryonic in nature 9) Dark Matter explains: a) the 80-90 % of “missing” mass in the Universe b) was important in star & galaxy formati ...
File - Mr. Catt`s Class
... 17-6 The Nature of Active Galactic Nuclei 1. According to present theory, the tremendous energy that comes from an AGN is caused by an immense black hole at the nucleus of the galaxy. The black hole is surrounded by an accretion disk heated by infalling material. 2. The leading theory on the nature ...
... 17-6 The Nature of Active Galactic Nuclei 1. According to present theory, the tremendous energy that comes from an AGN is caused by an immense black hole at the nucleus of the galaxy. The black hole is surrounded by an accretion disk heated by infalling material. 2. The leading theory on the nature ...
Chapter 15 Surveying the Stars
... • Most pulsating variable stars inhabit an instability strip on the H-R diagram. • The most luminous ones are known as Cepheid variables. © 2010 Pearson Education, Inc. ...
... • Most pulsating variable stars inhabit an instability strip on the H-R diagram. • The most luminous ones are known as Cepheid variables. © 2010 Pearson Education, Inc. ...
“Breakthroughs” of the 20th Century
... The Universe did not just contain a single galaxy; there were actually huge numbers of them. (1999 Hubble Space Telescope observations led to an estimate of about 125 billion, and more recent modelling programs indicate that the number might be as high as 500 billion.) A second surprise was the real ...
... The Universe did not just contain a single galaxy; there were actually huge numbers of them. (1999 Hubble Space Telescope observations led to an estimate of about 125 billion, and more recent modelling programs indicate that the number might be as high as 500 billion.) A second surprise was the real ...
The formation and evolution of galaxies
... For some galaxies in the Local Group, it is possible to measure the colours and magnitudes of individual stars Stellar evolution models can then be applied to determine the star formation history of these galaxies ...
... For some galaxies in the Local Group, it is possible to measure the colours and magnitudes of individual stars Stellar evolution models can then be applied to determine the star formation history of these galaxies ...
Piper_Evans - CoolWiki
... (Why so much lower?) Star formation rate (SFR) is a measurement of stars being born in terms of mass per unit time and is also considered in terms of SFR per unit area. The number of Young Stellar Objects (YSOs) in an area is literally multiplied by the assumed mean mass of 0.5 solar mass and divide ...
... (Why so much lower?) Star formation rate (SFR) is a measurement of stars being born in terms of mass per unit time and is also considered in terms of SFR per unit area. The number of Young Stellar Objects (YSOs) in an area is literally multiplied by the assumed mean mass of 0.5 solar mass and divide ...
Here
... • We can measure the temperature of a star relatively easily by its spectral type or color. If the distance is known, then we can measure its luminosity, and then compute its radius. Note, however, that the radius measured this way is not very accurate, owing to the uncertainty in the distance. • Is ...
... • We can measure the temperature of a star relatively easily by its spectral type or color. If the distance is known, then we can measure its luminosity, and then compute its radius. Note, however, that the radius measured this way is not very accurate, owing to the uncertainty in the distance. • Is ...
The Milky Way`s Restless Swarms of Stars
... Moreover, the binary fuel supply runs low as is hiding something.” To identify the suspected midsize black the orbits in each pair grow tighter after Somewhat better understood are the weird repeated interactions. A cluster might last a objects that arise when stars near a cluster’s holes, astronome ...
... Moreover, the binary fuel supply runs low as is hiding something.” To identify the suspected midsize black the orbits in each pair grow tighter after Somewhat better understood are the weird repeated interactions. A cluster might last a objects that arise when stars near a cluster’s holes, astronome ...
ChESS: ChaMP Extended Stellar Survey
... pointings. The model of the Galaxy (Bah all & Soneira 1983) is orre t only ...
... pointings. The model of the Galaxy (Bah all & Soneira 1983) is orre t only ...
The cosmic distance ladder
... He reasoned that if one wanted to compute the orbit of Mars precisely, one must first figure out the orbit of the Earth. ...
... He reasoned that if one wanted to compute the orbit of Mars precisely, one must first figure out the orbit of the Earth. ...
galaxy evolution
... starburst galaxies are detected mainly in the infrared and not in the visible and UV. • The luminosity in the far-infrared can exceed the luminosity in the visible/near-infrared by as much as 100 times. • The large rate of star production also produces a large rate of supernovae, which leads to the ...
... starburst galaxies are detected mainly in the infrared and not in the visible and UV. • The luminosity in the far-infrared can exceed the luminosity in the visible/near-infrared by as much as 100 times. • The large rate of star production also produces a large rate of supernovae, which leads to the ...
Cosmic distance ladder
The cosmic distance ladder (also known as the extragalactic distance scale) is the succession of methods by which astronomers determine the distances to celestial objects. A real direct distance measurement of an astronomical object is possible only for those objects that are ""close enough"" (within about a thousand parsecs) to Earth. The techniques for determining distances to more distant objects are all based on various measured correlations between methods that work at close distances and methods that work at larger distances. Several methods rely on a standard candle, which is an astronomical object that has a known luminosity.The ladder analogy arises because no one technique can measure distances at all ranges encountered in astronomy. Instead, one method can be used to measure nearby distances, a second can be used to measure nearby to intermediate distances, and so on. Each rung of the ladder provides information that can be used to determine the distances at the next higher rung.