3.2 Multi-Conjugate Adaptive Optics
... For full realization of their scientific potential, the Gemini telescopes will need high throughput from ultraviolet wavelengths longer than 0.3 microns through the visible and infrared bands to at least 30 microns. In order to achieve high performance across this very broad wavelength band, capabil ...
... For full realization of their scientific potential, the Gemini telescopes will need high throughput from ultraviolet wavelengths longer than 0.3 microns through the visible and infrared bands to at least 30 microns. In order to achieve high performance across this very broad wavelength band, capabil ...
Chapter 15 Stars, Galaxies and Universe
... • Parallax is an apparent shift in the position of an object when viewed from different locations. • Astronomers use parallax and trigonometry to find the actual distance to stars that are close to Earth. ...
... • Parallax is an apparent shift in the position of an object when viewed from different locations. • Astronomers use parallax and trigonometry to find the actual distance to stars that are close to Earth. ...
Theory of Pixel Lensing
... Suppose a series of measurements F (ti) are made at uniform intervals which are short compared to !e1 for a duration long compared to ! 1. And suppose that each measurement has the same noise F . Then the total signal to noise of the P ...
... Suppose a series of measurements F (ti) are made at uniform intervals which are short compared to !e1 for a duration long compared to ! 1. And suppose that each measurement has the same noise F . Then the total signal to noise of the P ...
exoplanet observing for amateurs
... amateurs to have fun with exoplanets; some are “educational,” some could contribute to a better understanding of exoplanets, and others are aimed at new discoveries. The various options for exoplanet observing are explained in Chapter 3. The advanced amateur may eventually be recruited to become a m ...
... amateurs to have fun with exoplanets; some are “educational,” some could contribute to a better understanding of exoplanets, and others are aimed at new discoveries. The various options for exoplanet observing are explained in Chapter 3. The advanced amateur may eventually be recruited to become a m ...
The size of AB Doradus A from VLTI/AMBER interferometry⋆
... stations provided the maximum angular resolution for our observation, 2.3 milliarcsec (mas). Each AMBER observing block contains 5 exposures of the target (AB Dor A) or calibrator (see below) and two additional exposures for dark and flat correction, each exposure having 200 frames, each recorded wi ...
... stations provided the maximum angular resolution for our observation, 2.3 milliarcsec (mas). Each AMBER observing block contains 5 exposures of the target (AB Dor A) or calibrator (see below) and two additional exposures for dark and flat correction, each exposure having 200 frames, each recorded wi ...
The ALTIUS mission
... OSIRIS, OMPS). Occultations also need to keep the light source in the field-of-view (FOV). The original approach proposed for ALTIUS is to use an imaging system with a FOV matching the apparent size of the bright limb (0-100km). With this method, in-flight calibration methods are more easily impleme ...
... OSIRIS, OMPS). Occultations also need to keep the light source in the field-of-view (FOV). The original approach proposed for ALTIUS is to use an imaging system with a FOV matching the apparent size of the bright limb (0-100km). With this method, in-flight calibration methods are more easily impleme ...
Multiplicity in Early Stellar Evolution
... work has continued on initially turbulent, massive clouds, with an eye toward determining cluster properties such as the initial mass function (e.g., Clark et al., 2008; Offner et al., 2009) and the number of brown dwarfs formed (e.g., Bonnell et al., 2008; Bate, 2009a,b; Attwood et al., 2009). 3D ...
... work has continued on initially turbulent, massive clouds, with an eye toward determining cluster properties such as the initial mass function (e.g., Clark et al., 2008; Offner et al., 2009) and the number of brown dwarfs formed (e.g., Bonnell et al., 2008; Bate, 2009a,b; Attwood et al., 2009). 3D ...
The Cosmos & the Bible
... – Light from objects that look thousands of lightyears away must have made many circuits and taken thousands of years to do so. ...
... – Light from objects that look thousands of lightyears away must have made many circuits and taken thousands of years to do so. ...
Herschel Observers` Manual
... SPIRE and HIFI. Herschel is an observatory mission: that is, its time is distributed among the community instead of being used for a large-scale survey. It is also a consumables-limited mission - its useful life depends on the lifetime of the helium in the dewar that is used to cool the instruments ...
... SPIRE and HIFI. Herschel is an observatory mission: that is, its time is distributed among the community instead of being used for a large-scale survey. It is also a consumables-limited mission - its useful life depends on the lifetime of the helium in the dewar that is used to cool the instruments ...
Fast Auto-Focus Method and Software for CCD
... far from Best Focus (user selected inside or outside of Best Focus) 2. A full frame 3x3 binned image is taken with a minimal exposure time 3. The brightest star is found, the position determined and the HFD measured 4. The target star is sub-framed and a second exposure taken (download time is minim ...
... far from Best Focus (user selected inside or outside of Best Focus) 2. A full frame 3x3 binned image is taken with a minimal exposure time 3. The brightest star is found, the position determined and the HFD measured 4. The target star is sub-framed and a second exposure taken (download time is minim ...
special - Carl Zeiss
... 3D spectroscopy appears to be ideally suited for the spectroscopy of large plane sources. It offers two significant advantages over conventional methods: first, several hundred spectra can be recorded simultaneously in a two-dimensional field of view. Thus, there is no need for time-consuming and co ...
... 3D spectroscopy appears to be ideally suited for the spectroscopy of large plane sources. It offers two significant advantages over conventional methods: first, several hundred spectra can be recorded simultaneously in a two-dimensional field of view. Thus, there is no need for time-consuming and co ...
orion® starseekers - NexStar Resource Site
... Battery. The battery pack requires 8 user supplied AA size alkaline batteries. To power the StarSeeker, insert the plug of your desired power supply into the 12v jack located on the side of the fork arm. Once the power supply is plugged in, the StarSeeker will power on and the hand control will disp ...
... Battery. The battery pack requires 8 user supplied AA size alkaline batteries. To power the StarSeeker, insert the plug of your desired power supply into the 12v jack located on the side of the fork arm. Once the power supply is plugged in, the StarSeeker will power on and the hand control will disp ...
Astronomical Picture of the Day
... slightly dark? Visible above is a close-up picture of a sunspot, a depression on the Sun's face that is slightly cooler and less luminous than the rest of the Sun. The Sun's complex magnetic field creates this cool region by inhibiting hot material from entering the spot. Sunspots can be larger than ...
... slightly dark? Visible above is a close-up picture of a sunspot, a depression on the Sun's face that is slightly cooler and less luminous than the rest of the Sun. The Sun's complex magnetic field creates this cool region by inhibiting hot material from entering the spot. Sunspots can be larger than ...
G030515-00 - DCC
... appearance of lumpy glass as evidenced by the bending of light First observed during the solar eclipse of 1919 by Sir Arthur Eddington, when the Sun was silhouetted against the Hyades star cluster This effect now used to map out the distribution of dark matter ...
... appearance of lumpy glass as evidenced by the bending of light First observed during the solar eclipse of 1919 by Sir Arthur Eddington, when the Sun was silhouetted against the Hyades star cluster This effect now used to map out the distribution of dark matter ...
R585 EXPLORERS OF THE SOUTHERN SKY
... Published by Cambridge University Press - author: Peter Duffett-Smith - 1996 - £19.95 (paperback) ISBN 0 521 56052 7 - number of pages: 168 - Astronomy Data processing/Astroscript - amateur astronomers “Easy PC Astronomy” is the book for all those who want to make astronomical calculations easily an ...
... Published by Cambridge University Press - author: Peter Duffett-Smith - 1996 - £19.95 (paperback) ISBN 0 521 56052 7 - number of pages: 168 - Astronomy Data processing/Astroscript - amateur astronomers “Easy PC Astronomy” is the book for all those who want to make astronomical calculations easily an ...
the spectral irradiance of the moon
... the Moon at perigee to fall entirely within its detector array, close to 1 m for both. The brightness difference between the Moon and stars is accommodated by inserting a neutral density filter into the optical path for lunar observations; stars are observed through a fused silica glass compensator. ...
... the Moon at perigee to fall entirely within its detector array, close to 1 m for both. The brightness difference between the Moon and stars is accommodated by inserting a neutral density filter into the optical path for lunar observations; stars are observed through a fused silica glass compensator. ...
Instruction Manual Meade Instruments Corporation
... objects would be required). For the purposes of casual visual telescopic observations, lining up the telescope's polar axis to within a degree or two of the pole is more than sufficient: with this level of pointing accuracy, the telescope can track accurately by slowly turning the telescope's R.A. f ...
... objects would be required). For the purposes of casual visual telescopic observations, lining up the telescope's polar axis to within a degree or two of the pole is more than sufficient: with this level of pointing accuracy, the telescope can track accurately by slowly turning the telescope's R.A. f ...
Hipparcos
Hipparcos was a scientific satellite of the European Space Agency (ESA), launched in 1989 and operated until 1993. It was the first space experiment devoted to precision astrometry, the accurate measurement of the positions of celestial objects on the sky. This permitted the accurate determination of proper motions and parallaxes of stars, allowing a determination of their distance and tangential velocity. When combined with radial-velocity measurements from spectroscopy, this pinpointed all six quantities needed to determine the motion of stars. The resulting Hipparcos Catalogue, a high-precision catalogue of more than 118,200 stars, was published in 1997. The lower-precision Tycho Catalogue of more than a million stars was published at the same time, while the enhanced Tycho-2 Catalogue of 2.5 million stars was published in 2000. Hipparcos ' follow-up mission, Gaia, was launched in 2013.The word ""Hipparcos"" is an acronym for High precision parallax collecting satellite and also a reference to the ancient Greek astronomer Hipparchus of Nicaea, who is noted for applications of trigonometry to astronomy and his discovery of the precession of the equinoxes.