Astronomy and Stonehenge
... Age Wessex, be interested in the perception of astronomical phenomena? A general answer is that in many, if not virtually all, non-Westem world-views celestial phenomena are not separated from terrestrial ones but form part of an integral whole with complex interconnections. The association may ofte ...
... Age Wessex, be interested in the perception of astronomical phenomena? A general answer is that in many, if not virtually all, non-Westem world-views celestial phenomena are not separated from terrestrial ones but form part of an integral whole with complex interconnections. The association may ofte ...
astronomy and the limits of vision
... Until modern times, the required mathematical tools and physical models were not available, so that ao significant advances on the old empirical rules were possible. However, the interests of modern astronomers has been sharply focused on high technology methods (e.g., spectroscopy, radio telescopes ...
... Until modern times, the required mathematical tools and physical models were not available, so that ao significant advances on the old empirical rules were possible. However, the interests of modern astronomers has been sharply focused on high technology methods (e.g., spectroscopy, radio telescopes ...
Wandering in the Redshift Desert
... COSMOS pBzKs (and along with them a much larger number of star-forming galaxies in the desert) would take about a quarter of the time we have estimated above for FORS2, i.e., some 350 VLT nights. This still looks like a lot of time, yet is somewhat more affordable than a mere FORS2 brute force effor ...
... COSMOS pBzKs (and along with them a much larger number of star-forming galaxies in the desert) would take about a quarter of the time we have estimated above for FORS2, i.e., some 350 VLT nights. This still looks like a lot of time, yet is somewhat more affordable than a mere FORS2 brute force effor ...
Astronomy Laboratory Manual
... You won't want to get a star atlas like Wil Tirion's "Sky Atlas 2000"; It's way too detailed. Good places to start are the monthly all-sky star maps that appear in "Astronomy" or "Sky & Telescope" magazines. You can also download a free monthly star map from Skymaps.com. Those will help you pick off ...
... You won't want to get a star atlas like Wil Tirion's "Sky Atlas 2000"; It's way too detailed. Good places to start are the monthly all-sky star maps that appear in "Astronomy" or "Sky & Telescope" magazines. You can also download a free monthly star map from Skymaps.com. Those will help you pick off ...
NexStar SLT Series Manual
... APPENDIX D – TIME ZONE MAPS ........................................................................................................................... 39 SKY MAPS......................................................................................................................................... ...
... APPENDIX D – TIME ZONE MAPS ........................................................................................................................... 39 SKY MAPS......................................................................................................................................... ...
Gravitational Lensing: An Unique Probe of Dark Matter and Dark...
... In the 1919 solar eclipse, starlight was only marginally deflected by the Sun’s gravitational field. However, for an optimal arrangement, a lens whose mass density in projection is above a critical value can multiply-image and magnify a background source. This is known as strong lensing (for an upto ...
... In the 1919 solar eclipse, starlight was only marginally deflected by the Sun’s gravitational field. However, for an optimal arrangement, a lens whose mass density in projection is above a critical value can multiply-image and magnify a background source. This is known as strong lensing (for an upto ...
Celestron Dacl"fl"c ...the world`s leading manufacturer the Celestron
... The School - One telescope ...
... The School - One telescope ...
solar twins and solar analogues in galactic surveys
... Sunrises, sunsets and eclipses shaped the beliefs of the early humans. For the primitive people the Sun was a God or an object being moved around by a God. They worshipped it, gave offerings and sacrifices. This view of a deity stayed on for thousands of years. We also know from most ancient culture ...
... Sunrises, sunsets and eclipses shaped the beliefs of the early humans. For the primitive people the Sun was a God or an object being moved around by a God. They worshipped it, gave offerings and sacrifices. This view of a deity stayed on for thousands of years. We also know from most ancient culture ...
Lecture Notes and Essays in Astrophysics VOLUME III
... review by Francisco Sánchez, encourager of such an endeavour which is today a reality. Robotic astronomy is not the future but a fact materialised for several telescopes worldwide, some of them in Spain. Alberto Castro-Tirado describes some of these instruments and their role in the detection and f ...
... review by Francisco Sánchez, encourager of such an endeavour which is today a reality. Robotic astronomy is not the future but a fact materialised for several telescopes worldwide, some of them in Spain. Alberto Castro-Tirado describes some of these instruments and their role in the detection and f ...
Expected gain in the pyramid wavefront sensor with limited Strehl ratio
... independent from the kind of WFS considered, in this paper we always assume the pupil as being sampled at r0 scale. Moreover, the following discussion, analytical computations, and simulations only apply to AO systems using unresolved sources. Extended references that can be resolved by the combinat ...
... independent from the kind of WFS considered, in this paper we always assume the pupil as being sampled at r0 scale. Moreover, the following discussion, analytical computations, and simulations only apply to AO systems using unresolved sources. Extended references that can be resolved by the combinat ...
The chemical composition of IK Pegasi
... subtle and are likely to be detected only at high-resolution. There have been relatively few abundance studies of IK Peg A. Cowley & Aikman (1980) extended the method of wavelength coincidence statistics (Cowley & Henry 1979) in an attempt to estimate abundances using empirical calibrations. They fo ...
... subtle and are likely to be detected only at high-resolution. There have been relatively few abundance studies of IK Peg A. Cowley & Aikman (1980) extended the method of wavelength coincidence statistics (Cowley & Henry 1979) in an attempt to estimate abundances using empirical calibrations. They fo ...
The Cosmos in Your Pocket: How Cosmological
... very quickly find ourselves encountering distance and time scales, as well as ranges of temperature and pressure, far beyond those accessible in Earth-based laboratories. In a surprising number of cases, we’ve discovered and explored properties of matter under extreme conditions in astrophysical env ...
... very quickly find ourselves encountering distance and time scales, as well as ranges of temperature and pressure, far beyond those accessible in Earth-based laboratories. In a surprising number of cases, we’ve discovered and explored properties of matter under extreme conditions in astrophysical env ...
ly Searching the Sky: The Swift Mission and High Energy Physics Connections
... - Abundance history of universe - First stars & first light - Star formation rate history - Gas and dust content of early galaxies ...
... - Abundance history of universe - First stars & first light - Star formation rate history - Gas and dust content of early galaxies ...
PDF
... merging halos governs the history of assembly and star formation in normal galaxies. The dark-matter picture can successfully reproduce both the degree of fluctuations observed in the microwave background and correlations found in the local galaxy distribution. It predicts that dark-matter halos ass ...
... merging halos governs the history of assembly and star formation in normal galaxies. The dark-matter picture can successfully reproduce both the degree of fluctuations observed in the microwave background and correlations found in the local galaxy distribution. It predicts that dark-matter halos ass ...
IN 175 SkyView Pro 8 EQ
... the sides, as this will knock the telescope off its target. Replace the eyepiece with the new one by sliding it gently into ...
... the sides, as this will knock the telescope off its target. Replace the eyepiece with the new one by sliding it gently into ...
2013 - Society for Astronomical Sciences
... angle), and continuing until First Quarter, or up to two days past First Quarter. Extending the run past First Quarter will depend on individual observer’s systems and how well each mitigates stray light from the sunlit part of the moon, so coverage will likely be less than ideal after First Quarter ...
... angle), and continuing until First Quarter, or up to two days past First Quarter. Extending the run past First Quarter will depend on individual observer’s systems and how well each mitigates stray light from the sunlit part of the moon, so coverage will likely be less than ideal after First Quarter ...
Omni XLT Manual - Celestron.UK.COM
... Sky Illumination ....................................................................................................................................... 33 ...
... Sky Illumination ....................................................................................................................................... 33 ...
The first focused hard X-ray images of the sun with
... et al. 2002). This results in a FoM for NuSTAR (1.3 × 10−6 cts s−1 cm−2) roughly a million times lower than the comparable FoM for RHESSI (1.2 cts s−1 cm−2), meaning a flare giving the same count rate as the background is a million times fainter for NuSTAR than for RHESSI. While interpreting this FoM ...
... et al. 2002). This results in a FoM for NuSTAR (1.3 × 10−6 cts s−1 cm−2) roughly a million times lower than the comparable FoM for RHESSI (1.2 cts s−1 cm−2), meaning a flare giving the same count rate as the background is a million times fainter for NuSTAR than for RHESSI. While interpreting this FoM ...
X-ray telescopes
... telescopes which are smaller in size and of lower angular resolution than the Einstein optics. The Einstein, as well as the Exosat, telescopes were operated in a pointing mode, switching from target to target which had been pre-selected from the ground, covering only a small fraction of the sky in t ...
... telescopes which are smaller in size and of lower angular resolution than the Einstein optics. The Einstein, as well as the Exosat, telescopes were operated in a pointing mode, switching from target to target which had been pre-selected from the ground, covering only a small fraction of the sky in t ...
Science with IMACS on Magellan
... The combination of large field and large aperture is achieved with some difficulty. The f/4.3 camera of IMACS produces an unvignetted 15-arcmin square field, comparable to DEIMOS on Keck, VIRMOS on VLT, and the planned Binospec on MMT, and an order-of-magnitude larger than LRIS or GMOS. The 27-arcmi ...
... The combination of large field and large aperture is achieved with some difficulty. The f/4.3 camera of IMACS produces an unvignetted 15-arcmin square field, comparable to DEIMOS on Keck, VIRMOS on VLT, and the planned Binospec on MMT, and an order-of-magnitude larger than LRIS or GMOS. The 27-arcmi ...
An Expanded View of the Universe
... Europe is at the forefront of all areas of contemporary astronomy, thanks, in particular, to the flagship ground-based facilities operated by ESO, the pre-eminent intergovernmental science and technology organisation in astronomy. The challenge is to consolidate and strengthen this position for the ...
... Europe is at the forefront of all areas of contemporary astronomy, thanks, in particular, to the flagship ground-based facilities operated by ESO, the pre-eminent intergovernmental science and technology organisation in astronomy. The challenge is to consolidate and strengthen this position for the ...
astro-ph/9505110 PDF
... square is the Orion Nebula from Walter, Dufour & Hester (1992); stars are solar neighborhood B stars from Gies & Lambert (1992) and Cunha & Lambert (1994); solar value is from Grevesse & Noels (1993). Right: C/N vs. O/H; symbols are the same as for the left panel. on the massive star yields of Woosl ...
... square is the Orion Nebula from Walter, Dufour & Hester (1992); stars are solar neighborhood B stars from Gies & Lambert (1992) and Cunha & Lambert (1994); solar value is from Grevesse & Noels (1993). Right: C/N vs. O/H; symbols are the same as for the left panel. on the massive star yields of Woosl ...
pdf
... technical requirements will take place at the January 2015 American Astronomical Society meeting. Exploring the time-domain will be a key discovery area of increasing community interest as the Large Synoptic Survey Telescope (LSST) comes to life. The improved power of NRAO telescopes is already bein ...
... technical requirements will take place at the January 2015 American Astronomical Society meeting. Exploring the time-domain will be a key discovery area of increasing community interest as the Large Synoptic Survey Telescope (LSST) comes to life. The improved power of NRAO telescopes is already bein ...
Design, fabrication, and open-loop control of micro deformable mirrors for Contents
... Astronomical instruments are also undergoing rapid evolution, especially large ground-based telescopes. Promising and relatively new AO instruments include multi-conjugate adaptive optics (MCAO), multi-object adaptive optics (MOAO), extreme adaptive optics (ExAO), and space-based adaptive optics. MC ...
... Astronomical instruments are also undergoing rapid evolution, especially large ground-based telescopes. Promising and relatively new AO instruments include multi-conjugate adaptive optics (MCAO), multi-object adaptive optics (MOAO), extreme adaptive optics (ExAO), and space-based adaptive optics. MC ...
The density of very massive evolved galaxies to z≃ 1.7
... break of galaxies at z < 1.2. We find that, at the average redshift z max 1.55, the seven massive early types account for a co-moving density ρ = (5.5 ± 2) × 10−5 Mpc−3 over a volume of about 1.5 × 105 Mpc3 . Given the stellar masses of the seven early types, the resulting mass density is ρ sta ...
... break of galaxies at z < 1.2. We find that, at the average redshift z max 1.55, the seven massive early types account for a co-moving density ρ = (5.5 ± 2) × 10−5 Mpc−3 over a volume of about 1.5 × 105 Mpc3 . Given the stellar masses of the seven early types, the resulting mass density is ρ sta ...
Leibniz Institute for Astrophysics Potsdam
Leibniz Institute for Astrophysics Potsdam (AIP) is a German research institute. It is the successor of the Berlin Observatory founded in 1700 and of the Astrophysical Observatory Potsdam (AOP) founded in 1874. The latter was the world's first observatory to emphasize explicitly the research area of astrophysics. The AIP was founded in 1992, in a re-structuring following the German Reunification.The AIP is privately funded and member of the Leibniz Association. It is located in Babelsberg in the state of Brandenburg, just west of Berlin, though the Einstein Tower solar observatory and the great refractor telescope on Telegrafenberg in Potsdam belong to the AIP. The key topics of the AIP are cosmic magnetic fields (magnetohydrodynamics) on various scales and extragalactic astrophysics. Astronomical and astrophysical fields studied at the AIP range from solar and stellar physics to stellar and galactic evolution to cosmology. The institute also develops research technology in the fields of spectroscopy and robotic telescopes. It is a partner of the Large Binocular Telescope in Arizona, has erected robotic telescopes in Tenerife and the Antarctic, develops astronomical instrumentation for large telescopes such as the VLT of the ESO. Furthermore, work on several e-Science projects are carried out at the AIP.