![Telescope Optics Myths](http://s1.studyres.com/store/data/007749159_1-8f7d88050008f74f33a6af2dcdf915c7-300x300.png)
Telescope Optics Myths
... Apos do not suffer from chromatic aberration, so you get very highcontrast views. This would seem to mean great planetary observing, but the other important factor in viewing is aperture. The more aperture your telescope has, the greater the resolution, which is just as important as contrast for pla ...
... Apos do not suffer from chromatic aberration, so you get very highcontrast views. This would seem to mean great planetary observing, but the other important factor in viewing is aperture. The more aperture your telescope has, the greater the resolution, which is just as important as contrast for pla ...
Planet Discoverer Interferometer I: PD!, a potential precursor to
... earlier studies2'3. These earlier studies concluded first that the task of observing the spectra of Earth-like planets required the "Sun" of the system to be blotted out by a broad, deep interferometric null that was better than could be produced by a two-beam interferometer. Secondly that such an i ...
... earlier studies2'3. These earlier studies concluded first that the task of observing the spectra of Earth-like planets required the "Sun" of the system to be blotted out by a broad, deep interferometric null that was better than could be produced by a two-beam interferometer. Secondly that such an i ...
Powerpoint slides
... Astronomers assume that most, if not all, spiral galaxies look pretty much the same. Therefore, this smaller-looking galaxy is probably a more distant galaxy. It is about five times as small as the larger-looking galaxy, so it is probably about five times farther…about two third of a mile away, on t ...
... Astronomers assume that most, if not all, spiral galaxies look pretty much the same. Therefore, this smaller-looking galaxy is probably a more distant galaxy. It is about five times as small as the larger-looking galaxy, so it is probably about five times farther…about two third of a mile away, on t ...
Post main sequence evolution
... Key points: -All stars in the cluster have the same age (were born at the same time) -Massive stars run out of fuel (leave the main sequence) sooner than less massive stars. The position of the “turn off point” is what tells us the age of a cluster. This is due to the fact that mass is related to th ...
... Key points: -All stars in the cluster have the same age (were born at the same time) -Massive stars run out of fuel (leave the main sequence) sooner than less massive stars. The position of the “turn off point” is what tells us the age of a cluster. This is due to the fact that mass is related to th ...
Galaxies - Mike Brotherton
... From outside, our Milky Way might very much look like our cosmic neighbor, the Andromeda Galaxy. ...
... From outside, our Milky Way might very much look like our cosmic neighbor, the Andromeda Galaxy. ...
Astronomy - Mr. Hill`s Science Website
... The most direct approach, adopted by Jacobus Kapteyn in order to determine the structure of the Milky Way, inferred distances for a number of stars in various directions to create a 3-dimensional view of our galaxy. Kapteyn found that our Sun lies at the very center of a nearly spherical distributio ...
... The most direct approach, adopted by Jacobus Kapteyn in order to determine the structure of the Milky Way, inferred distances for a number of stars in various directions to create a 3-dimensional view of our galaxy. Kapteyn found that our Sun lies at the very center of a nearly spherical distributio ...
ph507lecnote06
... Because stellar colours and spectral types are roughly correlated, we may construct a plot of absolute magnitude versus colour - called a colour-magnitude diagram. The relative ease and convenience with which colour indices (such as B - V) may be determined for vast numbers of stars dictates the pop ...
... Because stellar colours and spectral types are roughly correlated, we may construct a plot of absolute magnitude versus colour - called a colour-magnitude diagram. The relative ease and convenience with which colour indices (such as B - V) may be determined for vast numbers of stars dictates the pop ...
Using Photometric Data to Derive an HR Diagram
... COLOR tells us something about surface temperature. After we apply some corrections for absorption of starlight by dust, and to account for all the energy a star puts out that we don’t see, we can determine its actual luminosity. Once we have estimated a star’s absolute magnitude and luminosity, we ...
... COLOR tells us something about surface temperature. After we apply some corrections for absorption of starlight by dust, and to account for all the energy a star puts out that we don’t see, we can determine its actual luminosity. Once we have estimated a star’s absolute magnitude and luminosity, we ...
EUS REVIEW TO PPARC JAN 2004 (Harrison)
... An EUV Spectrometer for the ESA Solar Orbiter Mission The need for a spectrometer... This is the best we can do now: EUV imaging to 0.5 arcsec (350 km) and EUV spectroscopy to 2-3 arcsec. We know that the solar atmosphere is composed of fine-scale structures and must aim to develop appropriate ...
... An EUV Spectrometer for the ESA Solar Orbiter Mission The need for a spectrometer... This is the best we can do now: EUV imaging to 0.5 arcsec (350 km) and EUV spectroscopy to 2-3 arcsec. We know that the solar atmosphere is composed of fine-scale structures and must aim to develop appropriate ...
2_ISM - UCT Astronomy Department
... observing the same (standard) source several time during the night with a wide variety in zenith distances – usually well known for established Observatories. ...
... observing the same (standard) source several time during the night with a wide variety in zenith distances – usually well known for established Observatories. ...
constellations - Otterbein University
... - constellation shapes and names - star names and position in constellation - deep sky objects’ names and position • Quiz: You will be asked to find these objects on a star map. ...
... - constellation shapes and names - star names and position in constellation - deep sky objects’ names and position • Quiz: You will be asked to find these objects on a star map. ...
DTU 8e Chap 17 Quasars and Other Active Galaxies
... speed of 5% of the speed of light. According to the Hubble law, Cygnus A is therefore 635 million light-years from Earth. Because Cygnus A is one of the brightest radio sources in the sky, this remote galaxy’s energy output must be enormous. (b) An X-ray image of Cygnus A taken by the Chandra X-ray ...
... speed of 5% of the speed of light. According to the Hubble law, Cygnus A is therefore 635 million light-years from Earth. Because Cygnus A is one of the brightest radio sources in the sky, this remote galaxy’s energy output must be enormous. (b) An X-ray image of Cygnus A taken by the Chandra X-ray ...
Surveying the Stars
... • How do we classify stars? • Why is a star’s mass its • We classify stars according most important to their spectral type and property? • A star’s mass at birth luminosity class. ...
... • How do we classify stars? • Why is a star’s mass its • We classify stars according most important to their spectral type and property? • A star’s mass at birth luminosity class. ...
The population of young stars in Orion A: X-rays and... Ignazio Pillitteri , S. J. Wolk , L. Allen
... LX ∼ 1029.3 erg s−1 but that a fraction > 50% could be undetected below 1029.3 erg s−1, at masses ≤ 0.8 − 1M ⊙. We observe also that the fraction of X-rays detected Transition Disk objects (see fig. 1) is ∼ 28%, thus lower than that of X-ray detected CTT stars. This fraction strongly supports the gu ...
... LX ∼ 1029.3 erg s−1 but that a fraction > 50% could be undetected below 1029.3 erg s−1, at masses ≤ 0.8 − 1M ⊙. We observe also that the fraction of X-rays detected Transition Disk objects (see fig. 1) is ∼ 28%, thus lower than that of X-ray detected CTT stars. This fraction strongly supports the gu ...
Stars and Galaxies
... Parallax (let’s model it) As Earth orbits the Sun, we see nearby stars move relative to more distant stars How many degrees did the plate move, relative to the background? ...
... Parallax (let’s model it) As Earth orbits the Sun, we see nearby stars move relative to more distant stars How many degrees did the plate move, relative to the background? ...
Hands-On Lab Activites
... stretching a tape or placing a ruler next to an object to find out how long it is. Direct measurements are made on objects that can be easily handled. If objects are too big or too far away, such as the case with planets and stars, indirect measurements must be made. Parallax is an example of an ind ...
... stretching a tape or placing a ruler next to an object to find out how long it is. Direct measurements are made on objects that can be easily handled. If objects are too big or too far away, such as the case with planets and stars, indirect measurements must be made. Parallax is an example of an ind ...
Sample
... black hole originates from its immense mass and density. Astronomers know that a neutron star with a mass that is three times greater than the mass of the Sun cannot hold itself up under its own gravity and will compress into an infinitesimal point called a singularity, where the original matter is ...
... black hole originates from its immense mass and density. Astronomers know that a neutron star with a mass that is three times greater than the mass of the Sun cannot hold itself up under its own gravity and will compress into an infinitesimal point called a singularity, where the original matter is ...
Diapositiva 1
... Derivation of L,R, age ,m using parallaxes (and stellar models) Parametrization of special sources (galaxies…) ...
... Derivation of L,R, age ,m using parallaxes (and stellar models) Parametrization of special sources (galaxies…) ...
Diapositiva 1
... Derivation of L,R, age ,m using parallaxes (and stellar models) Parametrization of special sources (galaxies…) Italian contribution: Training data Galaxy simulation Cool star classification Not involved in the commissioning, but early tests with EPC ...
... Derivation of L,R, age ,m using parallaxes (and stellar models) Parametrization of special sources (galaxies…) Italian contribution: Training data Galaxy simulation Cool star classification Not involved in the commissioning, but early tests with EPC ...
Ancient Egyptian Astronomy
... Aryabhatta - was born in 476 A.D., and is widely recognized as the father of Indian astronomy. When he was about 25 years old, he presented astronomical and mathematical theories in which the Earth was taken to be spinning on its axis and the periods of the planets were given with respect to the Sun ...
... Aryabhatta - was born in 476 A.D., and is widely recognized as the father of Indian astronomy. When he was about 25 years old, he presented astronomical and mathematical theories in which the Earth was taken to be spinning on its axis and the periods of the planets were given with respect to the Sun ...
International Ultraviolet Explorer
![](https://en.wikipedia.org/wiki/Special:FilePath/International_Ultraviolet_Explorer.gif?width=300)
The International Ultraviolet Explorer (IUE) was an astronomical observatory satellite primarily designed to take ultraviolet spectra. The satellite was a collaborative project between NASA, the UK Science Research Council and the European Space Agency (ESA). The mission was first proposed in early 1964, by a group of scientists in the United Kingdom, and was launched on January 26, 1978 aboard a NASA Delta rocket. The mission lifetime was initially set for 3 years, but in the end it lasted almost 18 years, with the satellite being shut down in 1996. The switch-off occurred for financial reasons, while the telescope was still functioning at near original efficiency.It was the first space observatory to be operated in real time by astronomers who visited the groundstations in the United States and Europe. Astronomers made over 104,000 observations using the IUE, of objects ranging from solar system bodies to distant quasars. Among the significant scientific results from IUE data were the first large scale studies of stellar winds, accurate measurements of the way interstellar dust absorbs light, and measurements of the supernova SN1987A which showed that it defied stellar evolution theories as they then stood. When the mission ended, it was considered the most successful astronomical satellite ever.