A Recommendation - Amateur Astronomers, Inc.
... The other comet was Comet LINEAR (C/2002 T7) and was discovered by the U.S. Air Force’s Lincoln Near Earth Asteroid Research telescope at White Sands, New Mexico. It too was also predicted to be a bright comet. In a rare coincidence, both comets would be visible at almost the same time and would eve ...
... The other comet was Comet LINEAR (C/2002 T7) and was discovered by the U.S. Air Force’s Lincoln Near Earth Asteroid Research telescope at White Sands, New Mexico. It too was also predicted to be a bright comet. In a rare coincidence, both comets would be visible at almost the same time and would eve ...
Notes on Stars
... this observation. The real starting point of solar (and stellar) spectroscopy were Fraunhofers pioneering studies in 1816-1820 in Benediktbeuren and in the Munich Observatory together with von Soldner. Fraunhofer discovered numerous absorption lines in the solar spectrum and documented them with imp ...
... this observation. The real starting point of solar (and stellar) spectroscopy were Fraunhofers pioneering studies in 1816-1820 in Benediktbeuren and in the Munich Observatory together with von Soldner. Fraunhofer discovered numerous absorption lines in the solar spectrum and documented them with imp ...
Sparse aperture masking at the VLT II. Detection limits for the eight
... 3.80 µm, ∆λ = 0.62 µm) using two of the four masks available on NaCo, the "Broad Band (BB) 9 holes" and the "7 holes" masks. Observational details such as mask used, integration time (DIT), size of datacube, and number of exposures for each science target are summarized in Table 1. The operational m ...
... 3.80 µm, ∆λ = 0.62 µm) using two of the four masks available on NaCo, the "Broad Band (BB) 9 holes" and the "7 holes" masks. Observational details such as mask used, integration time (DIT), size of datacube, and number of exposures for each science target are summarized in Table 1. The operational m ...
Lab Manual - Radford University
... The celestial equator is the imaginary circle around the sky directly above the Earth’s equator. Figure A.4 illustrates the relationship of the NCP, SCP and celestial equator to the alt-azimuth system discussed earlier. In order to set up a system of coordinates on the celestial sphere, it is necess ...
... The celestial equator is the imaginary circle around the sky directly above the Earth’s equator. Figure A.4 illustrates the relationship of the NCP, SCP and celestial equator to the alt-azimuth system discussed earlier. In order to set up a system of coordinates on the celestial sphere, it is necess ...
Planetary Nebula
... odd but beautiful planetary nebula. The pool of light seen surrounding this binary system is energized by the hot surface of the faint star. Blue represents the hottest gas, which is confined to the inner region of the nebula. Red represents the coolest gas, at the outer edge. NGC 3132 is nearly hal ...
... odd but beautiful planetary nebula. The pool of light seen surrounding this binary system is energized by the hot surface of the faint star. Blue represents the hottest gas, which is confined to the inner region of the nebula. Red represents the coolest gas, at the outer edge. NGC 3132 is nearly hal ...
interstellar dust - Ira-Inaf
... graphite (carbon) and/or silicates (rock-like minerals) often coated with water ice. ...
... graphite (carbon) and/or silicates (rock-like minerals) often coated with water ice. ...
Far-ultraviolet and far-infrared bivariate luminosity function of galaxies:
... related to the star formation in galaxies, but in a very complicated manner. In order to disentangle the relation between FUV and FIR emissions, we estimate the UV-IR bivariate LF (BLF) of galaxies with GALEX and AKARI All-Sky Survey datasets. Recently, we developed a new mathematical method to cons ...
... related to the star formation in galaxies, but in a very complicated manner. In order to disentangle the relation between FUV and FIR emissions, we estimate the UV-IR bivariate LF (BLF) of galaxies with GALEX and AKARI All-Sky Survey datasets. Recently, we developed a new mathematical method to cons ...
Looking for planets with SPHERE in planetary systems with double
... Hill’s stability criterion. We compared again the results with detection limits and we obtained that, for such starting assumptions, triple planetary systems are more likely to be responsible for the gap. The last step of our analysis was to consider two equal-mass planets on eccentric orbits. We fo ...
... Hill’s stability criterion. We compared again the results with detection limits and we obtained that, for such starting assumptions, triple planetary systems are more likely to be responsible for the gap. The last step of our analysis was to consider two equal-mass planets on eccentric orbits. We fo ...
Project Description - SDSS-III
... on a consistent cosmological model that incorporates cold dark matter, a baryon-to-dark-matter ratio ∼1:6, flat space, and primordial fluctuations with the statistical properties predicted by inflation. This model requires one very surprising ingredient, “dark energy,” which drives accelerating expa ...
... on a consistent cosmological model that incorporates cold dark matter, a baryon-to-dark-matter ratio ∼1:6, flat space, and primordial fluctuations with the statistical properties predicted by inflation. This model requires one very surprising ingredient, “dark energy,” which drives accelerating expa ...
ULTRA Optics - Composite Mirror Applications Inc.
... demonstrate the use of continuous fiber reinforced plastic, CFRP, composite materials for optical telescope mirrors and telescope structures. Bearing in mind that ULTRA is a demonstration program, the primary objective under the MRI is to demonstrate that CFRP mirrors can be used in ground-based opt ...
... demonstrate the use of continuous fiber reinforced plastic, CFRP, composite materials for optical telescope mirrors and telescope structures. Bearing in mind that ULTRA is a demonstration program, the primary objective under the MRI is to demonstrate that CFRP mirrors can be used in ground-based opt ...
Collaborative Research Projects for Amateur Astronomers
... Detection of Extra-Solar Planets: STARE Telescope (currently in Canary Islands) The current STARE telescope, as of July, 1999, is a field-flattened Schmidt working aperture of 4 in, (f/2.9). The telescope is coupled to a Pixelvision 2K x 2K CCD (Charge-Coupled Device) camera to obtain images with a ...
... Detection of Extra-Solar Planets: STARE Telescope (currently in Canary Islands) The current STARE telescope, as of July, 1999, is a field-flattened Schmidt working aperture of 4 in, (f/2.9). The telescope is coupled to a Pixelvision 2K x 2K CCD (Charge-Coupled Device) camera to obtain images with a ...
Spitzer Spectroscopy of Circumstellar Disks in the 5 Myr Old Upper
... associated with excess emission that is characteristic of optically thick disks found around classical T Tauri stars. Stars more massive than ∼1.8 M⊙ are found with weak excesses at short wavelengths indicating that the inner ∼10 AU are cleared of primordial dust. Such excesses are more analogous to ...
... associated with excess emission that is characteristic of optically thick disks found around classical T Tauri stars. Stars more massive than ∼1.8 M⊙ are found with weak excesses at short wavelengths indicating that the inner ∼10 AU are cleared of primordial dust. Such excesses are more analogous to ...
NICMOS Coronagraphic Observations of 55 Cancri
... reclassified it as G8II-III, although a search through the literature spanning more than four decades (e.g., Nikonov et al. (1957), Marlborough (1964), and others) reveals no evidence of any optical variability as may be expected at some level for a sub-giant. Gonzalez (1998) confirmed its sub-giant ...
... reclassified it as G8II-III, although a search through the literature spanning more than four decades (e.g., Nikonov et al. (1957), Marlborough (1964), and others) reveals no evidence of any optical variability as may be expected at some level for a sub-giant. Gonzalez (1998) confirmed its sub-giant ...
Tycho Brahe
... After twenty years, Tycho had a run in with the new king, Christian IV, who wished to cut the astronomer’s stipend. Tycho closed the observatory, packed up his instruments, and set out to find a new sponsor. In 1599 he was appointed Imperial Mathematician in the court of the Holy Roman Emperor, Rudo ...
... After twenty years, Tycho had a run in with the new king, Christian IV, who wished to cut the astronomer’s stipend. Tycho closed the observatory, packed up his instruments, and set out to find a new sponsor. In 1599 he was appointed Imperial Mathematician in the court of the Holy Roman Emperor, Rudo ...
Teaching Tips Table of Contents - Hubble Deep Field
... Activity description ........................................................................................................... 1 Grade levels / Target audience........................................................................................ 1 Subjects ....................................... ...
... Activity description ........................................................................................................... 1 Grade levels / Target audience........................................................................................ 1 Subjects ....................................... ...
Lecture Notes and Essays in Astrophysics VOLUME III
... Planetology, Solar and Stellar Physics, Extragalactic Astronomy, Cosmology and astronomical instrumentation. After decades without a dedicated mission, Venus is again in fashion. On the one hand, Ricardo Hueso and collaborators, and on the other Miguel Ángel López-Valverde, review ESA Venus Expres ...
... Planetology, Solar and Stellar Physics, Extragalactic Astronomy, Cosmology and astronomical instrumentation. After decades without a dedicated mission, Venus is again in fashion. On the one hand, Ricardo Hueso and collaborators, and on the other Miguel Ángel López-Valverde, review ESA Venus Expres ...
Designing a Space Telescope to Image Earth
... all of the light at a point. Instead, a small disk, called the Airy disk, with diffraction rings around it appears. These diffraction rings are bright relative to any planet that might be orbiting a nearby star and so would completely hide the planet. The Sun, for example, would appear 1010 times br ...
... all of the light at a point. Instead, a small disk, called the Airy disk, with diffraction rings around it appears. These diffraction rings are bright relative to any planet that might be orbiting a nearby star and so would completely hide the planet. The Sun, for example, would appear 1010 times br ...
9. Telescope structure and kinematics
... accuracy and dimensional stability under varying gravity, thermal and wind loads. The achievable limits of structural eigen-frequencies impose that image stabilisation be implemented downstream in the optical train. The mechanical structure shall be seen as a “skeleton”, which supports all the sub-s ...
... accuracy and dimensional stability under varying gravity, thermal and wind loads. The achievable limits of structural eigen-frequencies impose that image stabilisation be implemented downstream in the optical train. The mechanical structure shall be seen as a “skeleton”, which supports all the sub-s ...
21. Galaxy Evolution Agenda The Monty Hall Problem/Paradox 21.1
... • What do we think is the source of power for active galactic nuclei? • We suspect that active galactic nuclei are powered by supermassive black holes that can exceed one billion solar masses. Observations of the rapid variability of active galactic nuclei tells us that their energy output comes fro ...
... • What do we think is the source of power for active galactic nuclei? • We suspect that active galactic nuclei are powered by supermassive black holes that can exceed one billion solar masses. Observations of the rapid variability of active galactic nuclei tells us that their energy output comes fro ...
Planet Formation: Disk Formation and Evolution
... There are a wide variety of terms used when referring to young stars, including protostar, pre-main sequence star, T Tauri star, and young stellar object. In 1972, Steve Strom coined the term young stellar object (or YSO for short) in recognition of the circumstellar material that strongly affects a ...
... There are a wide variety of terms used when referring to young stars, including protostar, pre-main sequence star, T Tauri star, and young stellar object. In 1972, Steve Strom coined the term young stellar object (or YSO for short) in recognition of the circumstellar material that strongly affects a ...
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... known as the Kuiper belt, contains tens of thousands of sizable bodies (> ∼100km diameter) and ∼109 small comets, and extends between 40 AU and ∼103 AU from the Sun. These new developments are giving a new perspective to our knowledge of a dusty circumstellar disk around Beta Pictoris (β Pic), a nea ...
... known as the Kuiper belt, contains tens of thousands of sizable bodies (> ∼100km diameter) and ∼109 small comets, and extends between 40 AU and ∼103 AU from the Sun. These new developments are giving a new perspective to our knowledge of a dusty circumstellar disk around Beta Pictoris (β Pic), a nea ...
Meteorites: Fragments of Asteroids
... The name asteroid was given to these small bodies by William Herschel in 1802 in the first scientific paper on the newly discovered objects. (1 Ceres and 2 Pallas) “…resemble small stars so much as hardly to be distinguished from them. From this, their asteroidal appearance, if I may use that expres ...
... The name asteroid was given to these small bodies by William Herschel in 1802 in the first scientific paper on the newly discovered objects. (1 Ceres and 2 Pallas) “…resemble small stars so much as hardly to be distinguished from them. From this, their asteroidal appearance, if I may use that expres ...
Spitzer Space Telescope
The Spitzer Space Telescope (SST), formerly the Space Infrared Telescope Facility (SIRTF), is an infrared space observatory launched in 2003. It is the fourth and final of the NASA Great Observatories program.The planned mission period was to be 2.5 years with a pre-launch expectation that the mission could extend to five or slightly more years until the onboard liquid helium supply was exhausted. This occurred on 15 May 2009. Without liquid helium to cool the telescope to the very low temperatures needed to operate, most of the instruments are no longer usable. However, the two shortest-wavelength modules of the IRAC camera are still operable with the same sensitivity as before the cryogen was exhausted, and will continue to be used in the Spitzer Warm Mission. All Spitzer data, from both the primary and warm phases, are archived at the Infrared Science Archive (IRSA).In keeping with NASA tradition, the telescope was renamed after its successful demonstration of operation, on 18 December 2003. Unlike most telescopes that are named after famous deceased astronomers by a board of scientists, the new name for SIRTF was obtained from a contest open to the general public.The contest led to the telescope being named in honor of astronomer Lyman Spitzer, who had promoted the concept of space telescopes in the 1940s. Spitzer wrote a 1946 report for RAND Corporation describing the advantages of an extraterrestrial observatory and how it could be realized with available or upcoming technology. He has been cited for his pioneering contributions to rocketry and astronomy, as well as ""his vision and leadership in articulating the advantages and benefits to be realized from the Space Telescope Program.""The US$800 million Spitzer was launched from Cape Canaveral Air Force Station, on a Delta II 7920H ELV rocket, Monday, 25 August 2003 at 13:35:39 UTC-5 (EDT).It follows a heliocentric instead of geocentric orbit, trailing and drifting away from Earth's orbit at approximately 0.1 astronomical unit per year (a so-called ""earth-trailing"" orbit). The primary mirror is 85 centimeters (33 in) in diameter, f/12, made of beryllium and is cooled to 5.5 K (−449.77 °F). The satellite contains three instruments that allow it to perform astronomical imaging and photometry from 3 to 180 micrometers, spectroscopy from 5 to 40 micrometers, and spectrophotometry from 5 to 100 micrometers.