EM spectrum
... light-gathering gain of a telescope vs. naked eye is primarily due to its larger aperture. The naked eye pupil opening, at its widest, ranges anywhere from ~4mm to ~8mm in diameter, with 6mm being the most often cited average. Thus - neglecting for the moment transmission and possible obstructions - ...
... light-gathering gain of a telescope vs. naked eye is primarily due to its larger aperture. The naked eye pupil opening, at its widest, ranges anywhere from ~4mm to ~8mm in diameter, with 6mm being the most often cited average. Thus - neglecting for the moment transmission and possible obstructions - ...
Differential photometry of delta Scuti stars on Maidanak Observatory
... V2455 Cyg observations produced most consistent and precise data (see Figure 1 for one night sample). Estimates suggest precision of 0.001 − 0.002m . It is a high-amplitude delta Scuti star; its amplitude is 0.44m . Other names for this star are BD+46 3325, GSC 0359001884, HD 204615 (F), NSV 25610, ...
... V2455 Cyg observations produced most consistent and precise data (see Figure 1 for one night sample). Estimates suggest precision of 0.001 − 0.002m . It is a high-amplitude delta Scuti star; its amplitude is 0.44m . Other names for this star are BD+46 3325, GSC 0359001884, HD 204615 (F), NSV 25610, ...
prof.-j.hill
... aperture. The two Gregorian telescope sides point at the same object, or groups of objects close together (1 arcmin) on the sky. A unique feature of LBT is that the light from the two primary mirrors can be combined in the center of the telescope to produce phased-array imaging of an extended field ...
... aperture. The two Gregorian telescope sides point at the same object, or groups of objects close together (1 arcmin) on the sky. A unique feature of LBT is that the light from the two primary mirrors can be combined in the center of the telescope to produce phased-array imaging of an extended field ...
Document
... Bazars are powerful gamma-ray sources. The most powerful of them have equivalent isotropic luminosity 1049 erg/s. Collimation θ2/2 ~ 10-2 – 10-3. θ – jet opening angle. EGRET detected 66 (+27) sources of this type. New breakthrough is expected after the launch of GLAST. Several sources have been det ...
... Bazars are powerful gamma-ray sources. The most powerful of them have equivalent isotropic luminosity 1049 erg/s. Collimation θ2/2 ~ 10-2 – 10-3. θ – jet opening angle. EGRET detected 66 (+27) sources of this type. New breakthrough is expected after the launch of GLAST. Several sources have been det ...
The Evolution of Coronal X
... increasingly sophisticated satellites have been flown. Einstein was the first to detect significant numbers of coronal sources from normal stars. Both it and the European follow-up EXOSAT had very limited spatial and spectral resolution. ROSAT offered reasonable imaging, a much larger telescope area ...
... increasingly sophisticated satellites have been flown. Einstein was the first to detect significant numbers of coronal sources from normal stars. Both it and the European follow-up EXOSAT had very limited spatial and spectral resolution. ROSAT offered reasonable imaging, a much larger telescope area ...
Study of the Point Spread Function of AGILE
... Mipot. The satellite was launched on April 23rd, 2007, from the Indian base of Sriharikota. AGILE is the first of a new generation of high-energy space Figure 1: the AGILE payload. The gammamissions based on solid-state silicon technology, ray imager GRID and, on top of it, the hard X-ray Super-AGIL ...
... Mipot. The satellite was launched on April 23rd, 2007, from the Indian base of Sriharikota. AGILE is the first of a new generation of high-energy space Figure 1: the AGILE payload. The gammamissions based on solid-state silicon technology, ray imager GRID and, on top of it, the hard X-ray Super-AGIL ...
Worksheet 1
... F. Distance from the center of a lens or mirror to the focal point G. The point on the optical axis of a curved mirror or lens where light rays that are initially parallel to the optical axis converge after striking the mirror or lens H. Instrument that uses two convex lenses to magnify small, close ...
... F. Distance from the center of a lens or mirror to the focal point G. The point on the optical axis of a curved mirror or lens where light rays that are initially parallel to the optical axis converge after striking the mirror or lens H. Instrument that uses two convex lenses to magnify small, close ...
Spherometer - Amateur Astronomers, Inc.
... mirrors of long focal ratio have but a small sagitta from which comes the motive force for propelling the sphere or cylinder, and upon a rough ground glass surface, this energy may be insufficient to secure smooth oscillations of the test sphere or cylinder to and fro upon the mirror surface. In emp ...
... mirrors of long focal ratio have but a small sagitta from which comes the motive force for propelling the sphere or cylinder, and upon a rough ground glass surface, this energy may be insufficient to secure smooth oscillations of the test sphere or cylinder to and fro upon the mirror surface. In emp ...
Paper - ESA Conference Bureau
... instrument will be tested with the X-axis along the vertical direction, and the corresponding load case consists of 1g gravity in the same direction. For operational conditions, we assumed a uniform temperature variation of the payload of 5 °C, which may lead to a performance degradation due to a po ...
... instrument will be tested with the X-axis along the vertical direction, and the corresponding load case consists of 1g gravity in the same direction. For operational conditions, we assumed a uniform temperature variation of the payload of 5 °C, which may lead to a performance degradation due to a po ...
By the time astronomers got a big telescope into orbit, they
... Number 1 January/February 1980, and "Astronomy From the Ground Up" by ...
... Number 1 January/February 1980, and "Astronomy From the Ground Up" by ...
Shocking Truth about Massive Stars Lidia Oskinova Chandra’s First Decade of Discovery
... collapses into a ~10 M Kerr black hole ... A superstrong ~10 15 G magnetic field is needed to make the object ... a microquasar. Such events must be vary rare...to account for the ... GRBs’’ ...
... collapses into a ~10 M Kerr black hole ... A superstrong ~10 15 G magnetic field is needed to make the object ... a microquasar. Such events must be vary rare...to account for the ... GRBs’’ ...
Buying A Telescope
... top of the line Obsession, Starsplitter, and Starmaster telescopes on the web. You place an order for one, specify custom parts like focusers, mirror vendors, and setting circles (a digital way to find objects in the sky when connected to a computer), and these firms custom build it for you. It may ...
... top of the line Obsession, Starsplitter, and Starmaster telescopes on the web. You place an order for one, specify custom parts like focusers, mirror vendors, and setting circles (a digital way to find objects in the sky when connected to a computer), and these firms custom build it for you. It may ...
May - Hawaiian Astronomical Society
... daytime sky with the public from the upper level of the Kahala Mall, outside Barnes & Noble bookstore. We will have a sign up at the next meeting for all those who want to participate in this activity. We will view the moon with personal scopes and share views of the sun with the solar telescopes. E ...
... daytime sky with the public from the upper level of the Kahala Mall, outside Barnes & Noble bookstore. We will have a sign up at the next meeting for all those who want to participate in this activity. We will view the moon with personal scopes and share views of the sun with the solar telescopes. E ...
Optics Education in the International Year of Astronomy
... society and culture, highlighted by the 400th anniversary of the first use of an astronomical telescope by Galileo Galilei. The aim of the Year is to stimulate worldwide interest, especially among young people, in astronomy and science under the central theme “The Universe, Yours to Discover”. IYA20 ...
... society and culture, highlighted by the 400th anniversary of the first use of an astronomical telescope by Galileo Galilei. The aim of the Year is to stimulate worldwide interest, especially among young people, in astronomy and science under the central theme “The Universe, Yours to Discover”. IYA20 ...
By Mary Ann Hodge, Murray State University Advised by Professor Peterson
... Will be located in northern Chile Will start operations in 2019/2020 8.4m primary mirror Optical Telescope ...
... Will be located in northern Chile Will start operations in 2019/2020 8.4m primary mirror Optical Telescope ...
Initial performance of the aspect system on the Chandra
... The aspect camera assembly (Figure 1) comprises a 11.2 cm, F/9 optical Ritchey-Chretien telescope. This assembly and its related components are mounted on the side of the High Resolution Mirror Assembly (HRMA). The camera’s field of view is 1.4 × 1.4 deg. The camera itself is placed at the end of a ...
... The aspect camera assembly (Figure 1) comprises a 11.2 cm, F/9 optical Ritchey-Chretien telescope. This assembly and its related components are mounted on the side of the High Resolution Mirror Assembly (HRMA). The camera’s field of view is 1.4 × 1.4 deg. The camera itself is placed at the end of a ...
How to Buy an Astronomical Telescope
... – Longer focal lengths don’t see fields of view as wide as shorter focal lengths. Note 1: Focal length (FL) = roughly, the distance between where light enters the primary optical element and where it comes to focus to produce an image. ...
... – Longer focal lengths don’t see fields of view as wide as shorter focal lengths. Note 1: Focal length (FL) = roughly, the distance between where light enters the primary optical element and where it comes to focus to produce an image. ...
SPIE Cox Lallo Focus Model - Space Telescope Science Institute
... Figure 4 shows the absolute magnitude of the correlations of each component with temperature in decreasing order. The decreasing component correlation supports the notion that only the first few need be included, Taking the first 7 components results in a fairly good fit to all the measurements from ...
... Figure 4 shows the absolute magnitude of the correlations of each component with temperature in decreasing order. The decreasing component correlation supports the notion that only the first few need be included, Taking the first 7 components results in a fairly good fit to all the measurements from ...
Document
... – Encourage you to turn in at least your first one early to get feedback to improve the rest. ...
... – Encourage you to turn in at least your first one early to get feedback to improve the rest. ...
1 NOVEL APPROACHES IN TECHNOLOGIES FOR - Cosmos
... curved, while the curved foils can be either bent (without heat) or thermally shaped. Bent glass foil optics has been already successfully used for a test laboratory sample for a XEUS-like optics module (the 0.75 mm thick and 300 x 300 mm large glass foils were beent to achieve the required paraboli ...
... curved, while the curved foils can be either bent (without heat) or thermally shaped. Bent glass foil optics has been already successfully used for a test laboratory sample for a XEUS-like optics module (the 0.75 mm thick and 300 x 300 mm large glass foils were beent to achieve the required paraboli ...
XMM-Newton
The XMM-Newton, also known as the X-ray Multi-Mirror Mission and the High Throughput X-ray Spectroscopy Mission, is an orbiting X-ray observatory launched by ESA in December 1999 on an Ariane 5 rocket. It is named in honor of Sir Isaac Newton. The telescope was placed in a very eccentric 48 hour elliptical orbit at 40°; at its apogee it is nearly 114,000 kilometres (71,000 mi) from Earth, while the perigee is only 7,000 kilometres (4,300 mi).