Schmidt-Cassegrain Optical Tube Assembly
... The Schmidt-Cassegrain focusing mechanism controls the primary mirror which is mounted on a ring that slides back and forth on the primary baffle tube. The focusing knob, which moves the primary mirror, is on the rear cell of the telescope just below the star diagonal and eyepiece. Turn the focusing ...
... The Schmidt-Cassegrain focusing mechanism controls the primary mirror which is mounted on a ring that slides back and forth on the primary baffle tube. The focusing knob, which moves the primary mirror, is on the rear cell of the telescope just below the star diagonal and eyepiece. Turn the focusing ...
Realization of X-ray telescopes—from design to
... can be constructed. However, in contrast to the single double-plate system, the image of a point-like source starts to become increasingly extended in size as the number of plates involved increases. Wolter type I telescopes bend the incident ray direction two times in the same plane, whereas the tw ...
... can be constructed. However, in contrast to the single double-plate system, the image of a point-like source starts to become increasingly extended in size as the number of plates involved increases. Wolter type I telescopes bend the incident ray direction two times in the same plane, whereas the tw ...
HD 140283: A Star in the Solar Neighborhood that Formed Shortly
... the distance estimates using ground-based spectroscopy and photometry of the six reference stars (whose V magnitudes range from 11.9 to 16.6). Due to space limitations, the details of this process will be published elsewhere, but we summarize here. For spectral classification, we obtained digital sp ...
... the distance estimates using ground-based spectroscopy and photometry of the six reference stars (whose V magnitudes range from 11.9 to 16.6). Due to space limitations, the details of this process will be published elsewhere, but we summarize here. For spectral classification, we obtained digital sp ...
red shift.
... To understand the Big Bang just imagine that the galaxies are located on the surface of an inflating balloon. As the balloon expands, every point on its surface is moving away from every other point. ...
... To understand the Big Bang just imagine that the galaxies are located on the surface of an inflating balloon. As the balloon expands, every point on its surface is moving away from every other point. ...
Astrophotography
... Autoguiding Accuracy Why is Autoguiding better than manual guiding? Simply put the guide star illuminates more than one pixel on the guide camera, as such Autoguiders are able to use the variations of light falling on each pixel to calculate where the star should actually be located. As a result, m ...
... Autoguiding Accuracy Why is Autoguiding better than manual guiding? Simply put the guide star illuminates more than one pixel on the guide camera, as such Autoguiders are able to use the variations of light falling on each pixel to calculate where the star should actually be located. As a result, m ...
flare swg usa
... FLARE can reach ~8 mag deeper than IRAC surveys at 3.5 μm, enabling the measurement of the NIR SEDs of young (<104 yr old) protostellar sources. YSOs down to about 0.2 M should be accessible out to >~1kpc. Clusters of embedded protostars inside dark cores along the Many protostars are clust ...
... FLARE can reach ~8 mag deeper than IRAC surveys at 3.5 μm, enabling the measurement of the NIR SEDs of young (<104 yr old) protostellar sources. YSOs down to about 0.2 M should be accessible out to >~1kpc. Clusters of embedded protostars inside dark cores along the Many protostars are clust ...
THE GALACTIC GAZETTE The Astronomical Society of Southern New England Next Meeting
... In 1929, Edwin Hubble announced the greatest discovery in the history of astronomy since Galileo first turned a telescope to the heavens. The galaxies, previously believed to float serenely in the void, are in fact hurtling apart at an incredible speed: the universe is expanding. This stunning disco ...
... In 1929, Edwin Hubble announced the greatest discovery in the history of astronomy since Galileo first turned a telescope to the heavens. The galaxies, previously believed to float serenely in the void, are in fact hurtling apart at an incredible speed: the universe is expanding. This stunning disco ...
red shift.
... the wavelengths of the light it emits are shifted towards the blue end of the spectrum (frequency is shifted higher). This is called blue shift. If the object is moving away its light is shifted towards the red end of the spectrum (frequency is shifted lower) . This is called red shift. This phenome ...
... the wavelengths of the light it emits are shifted towards the blue end of the spectrum (frequency is shifted higher). This is called blue shift. If the object is moving away its light is shifted towards the red end of the spectrum (frequency is shifted lower) . This is called red shift. This phenome ...
19 The Milky Way Galaxy
... Unknown subatomic particles? No evidence so far, but they are looking for them using the Large Hadron Collider ...
... Unknown subatomic particles? No evidence so far, but they are looking for them using the Large Hadron Collider ...
Spring 2017 - Astronomers of Humboldt
... northern latitudes, but it is best viewed in the spring when it is high in the sky. M97 (Fig. 6) is located at the bottom of the bowl. This large planetary nebula is known as the Owl Nebula because of two large dark areas that resemble eyes. The galactic pair M81 and M82 (Fig. 7) are located about 1 ...
... northern latitudes, but it is best viewed in the spring when it is high in the sky. M97 (Fig. 6) is located at the bottom of the bowl. This large planetary nebula is known as the Owl Nebula because of two large dark areas that resemble eyes. The galactic pair M81 and M82 (Fig. 7) are located about 1 ...
July - Rose City Astronomers
... provides the same benefit to the amateur astronomer. Digital astroimaging provides an excellent way to observe new objects and fainter details with smaller optics. Astroimaging extends an astronomer's ability to enjoy observing the universe. There are many types of cameras, lens, telescopes, mounts, ...
... provides the same benefit to the amateur astronomer. Digital astroimaging provides an excellent way to observe new objects and fainter details with smaller optics. Astroimaging extends an astronomer's ability to enjoy observing the universe. There are many types of cameras, lens, telescopes, mounts, ...
ph507-16-1exo2
... Some stunning individual systems have been reported (Marois et al. 2010, Lagrange et al. 2010), but the surveys indicate that fewer planets are found than would be predicted by extrapolating the power-law (of Eqn. (1) – see next lecture) out to 10-100 AU. Circumstellar dust discs. (Circumstantial ev ...
... Some stunning individual systems have been reported (Marois et al. 2010, Lagrange et al. 2010), but the surveys indicate that fewer planets are found than would be predicted by extrapolating the power-law (of Eqn. (1) – see next lecture) out to 10-100 AU. Circumstellar dust discs. (Circumstantial ev ...
Lect18-4-19-10
... so that freely falling particles, particles on which no forces additional to gravity are acting, follow paths that are curved by the distortion of the space they are moving through. For Einstein, if we can calculate the curvature of space-time everywhere from a knowledge of the positions of the grav ...
... so that freely falling particles, particles on which no forces additional to gravity are acting, follow paths that are curved by the distortion of the space they are moving through. For Einstein, if we can calculate the curvature of space-time everywhere from a knowledge of the positions of the grav ...
How Big is the Universe
... the sky than are visible to the naked eye. Later, astronomers learned they were part of the Milky Way Galaxy. They also observed many fuzzy, cloudy looking patches. They were called nebulae. This is the Latin word for clouds. Some of them appeared to be giant clouds of gas and dust inside the Milky ...
... the sky than are visible to the naked eye. Later, astronomers learned they were part of the Milky Way Galaxy. They also observed many fuzzy, cloudy looking patches. They were called nebulae. This is the Latin word for clouds. Some of them appeared to be giant clouds of gas and dust inside the Milky ...
Communication with Extraterrestrial Intelligence (CETI)
... seems completely connected; life as we know it appears to have had a single common ancestor. But what about life as we don’t yet know it? Might it exist on Earth today in extreme environments, and remain undetected because of our instrumental biases toward carbon-based organisms? Might it exist on o ...
... seems completely connected; life as we know it appears to have had a single common ancestor. But what about life as we don’t yet know it? Might it exist on Earth today in extreme environments, and remain undetected because of our instrumental biases toward carbon-based organisms? Might it exist on o ...
Galileo Galilei The Sidereal Messenger http://archive.org/stream
... all astronomers and philosophers, is this, namely, that I have discovered four planets, neither known nor observed by any one of the astronomers before my time, which have their orbits round a certain bright star, one of those previously known, like Venus and Mercury round the Sun, and are sometimes ...
... all astronomers and philosophers, is this, namely, that I have discovered four planets, neither known nor observed by any one of the astronomers before my time, which have their orbits round a certain bright star, one of those previously known, like Venus and Mercury round the Sun, and are sometimes ...
Monday, June 23, 2014
... handwritten formulae and values of constants for the exam no solutions, derivations or definitions! • No additional formulae or values of constants will be provided! ...
... handwritten formulae and values of constants for the exam no solutions, derivations or definitions! • No additional formulae or values of constants will be provided! ...
ppp
... • Java3D is a viable tool for creating scientific simulations and visualizations • Performance losses from using Java3D are relatively big compared with pure OpenGL • Development time is significantly less, due to higher level abstraction of Java3D’s API ...
... • Java3D is a viable tool for creating scientific simulations and visualizations • Performance losses from using Java3D are relatively big compared with pure OpenGL • Development time is significantly less, due to higher level abstraction of Java3D’s API ...
In-the-Spectacle-Lens Telescopic Device for Low Vision
... This equation (5) and equation (2) relate the variables that rule the design of the built-in-glass Keplerian telescope. The distance e is usually fixed to a practical value (e.g. 12mm) as that used in conventional spectacle dispensing. The magnification M is determined by the needs of the user. Conv ...
... This equation (5) and equation (2) relate the variables that rule the design of the built-in-glass Keplerian telescope. The distance e is usually fixed to a practical value (e.g. 12mm) as that used in conventional spectacle dispensing. The magnification M is determined by the needs of the user. Conv ...
Your first - Kerry International Dark
... at the north celestial pole, which is a very short way from Polaris. To do this, tweak the altitude and azimuth knobs on the mount until Polaris is in the correct position in the polar scope’s reticule. See your manual for ...
... at the north celestial pole, which is a very short way from Polaris. To do this, tweak the altitude and azimuth knobs on the mount until Polaris is in the correct position in the polar scope’s reticule. See your manual for ...
Week 11 Concept Summary
... (c) Halo: The halo contains only older stars, almost all inside the globular clusters also found there. There is no gas and dust, and what stars are there have very low concentrations of heavy elements. They also orbit randomly in the gallaxy. 2. Interstellar Medium: This is the gas and dust that fl ...
... (c) Halo: The halo contains only older stars, almost all inside the globular clusters also found there. There is no gas and dust, and what stars are there have very low concentrations of heavy elements. They also orbit randomly in the gallaxy. 2. Interstellar Medium: This is the gas and dust that fl ...
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.