3. Wavefront sensors - Caltech Optical Observatories
... narrow field relay. Science objects for the dIFS are selected with pickoff arms which send small patches of the field into a spectrometer. Along this path, a second “tweeter” DM, a MEMS device, further corrects the wavefront specific to this particular science direction using information from the to ...
... narrow field relay. Science objects for the dIFS are selected with pickoff arms which send small patches of the field into a spectrometer. Along this path, a second “tweeter” DM, a MEMS device, further corrects the wavefront specific to this particular science direction using information from the to ...
The Search for Extrasolar Earth-like Planets
... The first is that planets will receive a very different wavelength-distribution of starlight, one that peaks at near-infrared wavelengths. The second is that for the same planet-star distance a planet will receive a much lower intensity of starlight. This has an interesting implication—planets with ...
... The first is that planets will receive a very different wavelength-distribution of starlight, one that peaks at near-infrared wavelengths. The second is that for the same planet-star distance a planet will receive a much lower intensity of starlight. This has an interesting implication—planets with ...
New Double Stars from Asteroidal Occultations, 1971 - 2008
... location of the shadow path as it crosses the Earth. Since the Hipparcos mission, and the availability of catalogues like Tycho2 and UCAC2, predictions of occultations by asteroids and planetary moons with uncertainties of 100km in the path location have become routine. For the last few years almost ...
... location of the shadow path as it crosses the Earth. Since the Hipparcos mission, and the availability of catalogues like Tycho2 and UCAC2, predictions of occultations by asteroids and planetary moons with uncertainties of 100km in the path location have become routine. For the last few years almost ...
X-ray activity cycle on the active ultra
... gratings. These two reflection-grating spectrometers (RGS) provide high spectral resolution (E/ΔE ≈ 200–800) in the energy range 0.35–2.5 keV. Useful data were obtained from the EPIC and the RGS detectors (see Table 1 for a detailed account). AB Dor A, which is a very bright target with many emissio ...
... gratings. These two reflection-grating spectrometers (RGS) provide high spectral resolution (E/ΔE ≈ 200–800) in the energy range 0.35–2.5 keV. Useful data were obtained from the EPIC and the RGS detectors (see Table 1 for a detailed account). AB Dor A, which is a very bright target with many emissio ...
Planets and Moons - Fraser Heights Chess Club
... grand spiral arms and sweeping cosmic dust lanes with a scale comparable to the Milky Way. Hinting at a disorderly past, a remarkable dust lane runs straight through the disk, below and right of the galactic center, contrary to M81's other prominent spiral features. The errant dust lane may be the l ...
... grand spiral arms and sweeping cosmic dust lanes with a scale comparable to the Milky Way. Hinting at a disorderly past, a remarkable dust lane runs straight through the disk, below and right of the galactic center, contrary to M81's other prominent spiral features. The errant dust lane may be the l ...
A New Science Strategy for Space Astronomy and Astrophysics
... this field, the report identified in priority order the most important scientific programs and projects for both groundand space-based research. It recommended a single large initiative for space, the Space Infrared Telescope Facility, which now appears to be getting under way, albeit on a smaller s ...
... this field, the report identified in priority order the most important scientific programs and projects for both groundand space-based research. It recommended a single large initiative for space, the Space Infrared Telescope Facility, which now appears to be getting under way, albeit on a smaller s ...
In 1929, the astronomer Edwin Hubble observed that the light from
... The observations made by Hubble support the idea that the Universe is expanding. This means that galaxies are continually moving away from each other and from the Earth. Figure 2 shows a student using a balloon to model the idea of an expanding Universe. Some dots, which represent galaxies, were ma ...
... The observations made by Hubble support the idea that the Universe is expanding. This means that galaxies are continually moving away from each other and from the Earth. Figure 2 shows a student using a balloon to model the idea of an expanding Universe. Some dots, which represent galaxies, were ma ...
EQUIPMENT
... For the planets that you observed, and for the dwarf planet Ceres if you observed it, use Afterglow (1) to zoom in to the object and (2) to adjust the brightness and contrast levels of your images to bring out as much detail in them as possible. Do not attempt to bring out the moons; we will do that ...
... For the planets that you observed, and for the dwarf planet Ceres if you observed it, use Afterglow (1) to zoom in to the object and (2) to adjust the brightness and contrast levels of your images to bring out as much detail in them as possible. Do not attempt to bring out the moons; we will do that ...
PH607lec10-4gal2
... Often low surface brightness, so they are hard to find! Why are dwarf galaxies important?? Majority of galaxies are dwarfs!! There are probably lots of these, in the Local Group there are >30! Dwarf galaxies may be remnants of galaxy formation process: “proto-dwarf” gas clouds came together to form ...
... Often low surface brightness, so they are hard to find! Why are dwarf galaxies important?? Majority of galaxies are dwarfs!! There are probably lots of these, in the Local Group there are >30! Dwarf galaxies may be remnants of galaxy formation process: “proto-dwarf” gas clouds came together to form ...
Galaxy Formation and Evolution
... Having specified the initial conditions and the cosmological framework, one can compute how small perturbations in the density field evolve. In a universe dominated by non-relativistic matter, perturbations grow with time. A region whose initial density is higher than the mean will attract its surro ...
... Having specified the initial conditions and the cosmological framework, one can compute how small perturbations in the density field evolve. In a universe dominated by non-relativistic matter, perturbations grow with time. A region whose initial density is higher than the mean will attract its surro ...
9 Dwarf Galaxies
... alpha at 6563 Angstroms (the brightest line), as well as other fainter lines in this region due to [NII]. HII regions appear reddish in this image because of the prominence of the H alpha line in the red region of the spectrum. ...
... alpha at 6563 Angstroms (the brightest line), as well as other fainter lines in this region due to [NII]. HII regions appear reddish in this image because of the prominence of the H alpha line in the red region of the spectrum. ...
PowerPoint
... – Topics covered in lectures should be stressed. – Homework questions have good examples of questions that may show up on the exam. An excellent way to begin studying is to review the homework problems, particularly those you missed (or got right but were not so sure about). Be sure you understand w ...
... – Topics covered in lectures should be stressed. – Homework questions have good examples of questions that may show up on the exam. An excellent way to begin studying is to review the homework problems, particularly those you missed (or got right but were not so sure about). Be sure you understand w ...
Molecular Shapes and Polarity
... b. Novex Mining Corporation leaves debris in orbit of the asteroid Ceres. (1 mark) c. The entire human race wishes to populate the ocean on one of Jupiter’s small moons, Ganymede. Hundreds of creatures already live in that ocean. (1 mark) d. The Galactic Empire has begun mining operations on planet ...
... b. Novex Mining Corporation leaves debris in orbit of the asteroid Ceres. (1 mark) c. The entire human race wishes to populate the ocean on one of Jupiter’s small moons, Ganymede. Hundreds of creatures already live in that ocean. (1 mark) d. The Galactic Empire has begun mining operations on planet ...
A History of Star Catalogues - The Albuquerque Astronomical Society
... contains a catalogue of 777 stars. (Watbooks-Brahe 2003) They are measured with far greater accuracy than any previous measurements. The book was printed between 1588 and 1598 by Tycho’s private press on the Island of Hven, where his observatory called Uranaborg was located. After Tycho died his ass ...
... contains a catalogue of 777 stars. (Watbooks-Brahe 2003) They are measured with far greater accuracy than any previous measurements. The book was printed between 1588 and 1598 by Tycho’s private press on the Island of Hven, where his observatory called Uranaborg was located. After Tycho died his ass ...
Evolved, single, slowly rotating... but magnetically active
... grating A, camera 5 and the long collimator resulting in a resolving power of 38,000 at 6420 Å with the TI-5 CCD, and 32,000 with the F3KB CCD. The CFHT spectra were obtained with the Gecko coudé spectrograph and the Loral 20482 CCD (15 µ pixels) with an effective resolving power of 120,000 at 671 ...
... grating A, camera 5 and the long collimator resulting in a resolving power of 38,000 at 6420 Å with the TI-5 CCD, and 32,000 with the F3KB CCD. The CFHT spectra were obtained with the Gecko coudé spectrograph and the Loral 20482 CCD (15 µ pixels) with an effective resolving power of 120,000 at 671 ...
Stellar Evolution : The Life and Death of Our Luminous Neighbors
... The light that moves outward through the sun is what astronomers call a continuous spectrum since the interior regions of the sun have high density. However, when the light reaches the low density region of the solar atmosphere called the chromosphere, some colors of light are absorbed. This occurs ...
... The light that moves outward through the sun is what astronomers call a continuous spectrum since the interior regions of the sun have high density. However, when the light reaches the low density region of the solar atmosphere called the chromosphere, some colors of light are absorbed. This occurs ...
Project Description - SDSS-III
... from the Legacy Survey and SEGUE was SDSS DR6 in June 2007. DR6 is the first data release to incorporate “ubercalibration,” which uses auxiliary observations and a novel analysis of imaging overlaps to improve the global photometric fidelity of the SDSS data by a factor of two, to approximately 1%. ...
... from the Legacy Survey and SEGUE was SDSS DR6 in June 2007. DR6 is the first data release to incorporate “ubercalibration,” which uses auxiliary observations and a novel analysis of imaging overlaps to improve the global photometric fidelity of the SDSS data by a factor of two, to approximately 1%. ...
Read an Excerpt!
... objects existed beyond the orbit of Pluto. He wrote that “the outer region of the solar system, beyond the orbits of the planets, is occupied by a very large number of comparatively small bodies.” Edgeworth said these worlds were leftovers from the birth of the solar system. In 1951, American astron ...
... objects existed beyond the orbit of Pluto. He wrote that “the outer region of the solar system, beyond the orbits of the planets, is occupied by a very large number of comparatively small bodies.” Edgeworth said these worlds were leftovers from the birth of the solar system. In 1951, American astron ...
Module code: AA1
... The hypothetical question how the night sky would appear if all stars would possess the same luminosity as the sun or Barnard’s star was analysed with Excel diagrams leading to the conclusion that in case of the sun the night sky would have less bright stars and in case of Barnard’s star with the na ...
... The hypothetical question how the night sky would appear if all stars would possess the same luminosity as the sun or Barnard’s star was analysed with Excel diagrams leading to the conclusion that in case of the sun the night sky would have less bright stars and in case of Barnard’s star with the na ...
Measuring the Stars Section 29.2
... Basic Properties of Stars Magnitude The classification of stars by absolute magnitude allows comparisons that are based on how bright the stars would appear at equal distances from an observer. The disadvantage of absolute magnitude is that it can be calculated only when the actual distance to a sta ...
... Basic Properties of Stars Magnitude The classification of stars by absolute magnitude allows comparisons that are based on how bright the stars would appear at equal distances from an observer. The disadvantage of absolute magnitude is that it can be calculated only when the actual distance to a sta ...
MS-Word format - Eyes-on-the
... of the basics, and reward the amateur with a capable instrument at a fraction of the cost of an equivalent commercial system. If a binocular lens (or small parabolic mirror) and a small first surface mirror are already available, a spectroscope can be built for not much more than the cost of a diffr ...
... of the basics, and reward the amateur with a capable instrument at a fraction of the cost of an equivalent commercial system. If a binocular lens (or small parabolic mirror) and a small first surface mirror are already available, a spectroscope can be built for not much more than the cost of a diffr ...
3. The MONS Telescope requirements
... squared (i.e., as 1/f in amplitude), as seems likely. The spectrum can then level out at frequencies higher than 10 Hz. The ACS power spectrum should be flat below 10 mHz and drop between 10 mHz to 10 Hz by a factor of more than 100 in amplitude (10000 in power). If the ACS power spectrum shape is s ...
... squared (i.e., as 1/f in amplitude), as seems likely. The spectrum can then level out at frequencies higher than 10 Hz. The ACS power spectrum should be flat below 10 mHz and drop between 10 mHz to 10 Hz by a factor of more than 100 in amplitude (10000 in power). If the ACS power spectrum shape is s ...
Deriving the Isoradius Lines (optional, mathematical
... An actual HR Diagram is provided in the upper right panel with an active location indicated by a red x. This active location can be dragged around the diagram. The options panel allows you to control the variables plotted on the x-axis: (temperature, BV, or spectral type) and those plotted on the y- ...
... An actual HR Diagram is provided in the upper right panel with an active location indicated by a red x. This active location can be dragged around the diagram. The options panel allows you to control the variables plotted on the x-axis: (temperature, BV, or spectral type) and those plotted on the y- ...
International Ultraviolet Explorer
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.