USRA - MSU Solar Physics
... Observatory. WIRO, situated at 2944 m 40 km southwest of Laramie in semi-arid ...
... Observatory. WIRO, situated at 2944 m 40 km southwest of Laramie in semi-arid ...
BT-70-45 review by Phil Harrington
... One terrific product Each of the 23.9mm eyepieces that come with the BT-70-45 slides into a helical focuser that has a locking ring. The numbers on the barrels are diopter adjustments. ...
... One terrific product Each of the 23.9mm eyepieces that come with the BT-70-45 slides into a helical focuser that has a locking ring. The numbers on the barrels are diopter adjustments. ...
doc - Eu-Hou
... The background is that even though there is very little hydrogen, two atoms happen to collide every now and then. The collision energy excites one (or both) atoms, and the excited state of the atom decays after some time. The energy is released in the form of electromagnetic radiation, which in the ...
... The background is that even though there is very little hydrogen, two atoms happen to collide every now and then. The collision energy excites one (or both) atoms, and the excited state of the atom decays after some time. The energy is released in the form of electromagnetic radiation, which in the ...
The Very precise Echelle SpectroPolarimeter on the Araki telescope
... tropolarimetric mode in the visible wavelength region. A polarization modulator and a Wollaston prism as analyzer are installed near the pupil, where the collimated beam diameter is a minimum. FORS2 can obtain linear and circular polarization spectra with 260 < R < 2600 in the wavelength range of 13 ...
... tropolarimetric mode in the visible wavelength region. A polarization modulator and a Wollaston prism as analyzer are installed near the pupil, where the collimated beam diameter is a minimum. FORS2 can obtain linear and circular polarization spectra with 260 < R < 2600 in the wavelength range of 13 ...
- IRSA
... is the effective diameter of the SIRTF primary mirror (85cm) and Tfl is the SIRTF telescope effective focal length. Internally, each module then mapped this slit width geometrically across two pixels on its detector array. Slit lengths were set to be as long as possible, limited by the sizes of the ...
... is the effective diameter of the SIRTF primary mirror (85cm) and Tfl is the SIRTF telescope effective focal length. Internally, each module then mapped this slit width geometrically across two pixels on its detector array. Slit lengths were set to be as long as possible, limited by the sizes of the ...
Controlling a Three Meter Mirror Array Reflector to Track Stars
... relative to our standard time. As opposed to basing a day on the time it takes for the Earth to make a revolution relative to the sun, it bases it on the time it takes for the Earth to make a revolution relative to the distant stars on the celestial sphere. Since sidereal time is required to make th ...
... relative to our standard time. As opposed to basing a day on the time it takes for the Earth to make a revolution relative to the sun, it bases it on the time it takes for the Earth to make a revolution relative to the distant stars on the celestial sphere. Since sidereal time is required to make th ...
EUVE Measurements of Interplanetary Helium
... Adaptive optics tutorial* Turbulence in earth’s atmosphere makes stars twinkle More importantly, turbulence spreads out light; makes it a blob rather than a point *Adapted from AO lectures of Claire Max, Astro 289C, UC Santa Cruz ...
... Adaptive optics tutorial* Turbulence in earth’s atmosphere makes stars twinkle More importantly, turbulence spreads out light; makes it a blob rather than a point *Adapted from AO lectures of Claire Max, Astro 289C, UC Santa Cruz ...
PDF only - at www.arxiv.org.
... The Astrophysics Division continues to fund several payloads, via the APRA annual solicitation, for both balloon and sounding rocket experiments. The annual number of astrophysics flights in the last five years, for each activity, has been about 3-5, throughout different seasonal campaigns. These pa ...
... The Astrophysics Division continues to fund several payloads, via the APRA annual solicitation, for both balloon and sounding rocket experiments. The annual number of astrophysics flights in the last five years, for each activity, has been about 3-5, throughout different seasonal campaigns. These pa ...
Astronomical Telescope
... will note that the image it offers is upside down for the same reasons as that of the main telescope. Depending on the design of the telescope that you possess, the Finder will be attached to the main telescope by a bracket that will have either three or six radially spaced adjusting screws: if your ...
... will note that the image it offers is upside down for the same reasons as that of the main telescope. Depending on the design of the telescope that you possess, the Finder will be attached to the main telescope by a bracket that will have either three or six radially spaced adjusting screws: if your ...
FISICA: The Florida Image Slicer for Infrared Cosmology
... mirrors. These cause a near-complete loss of light over ~1-arcsec near the center of each affected slitlet (comprising ½ of all slitlets). While these were somewhat problematic, they can be compensated using standard dither/nod observing techniques. Furthermore, by slightly offsetting the flat field ...
... mirrors. These cause a near-complete loss of light over ~1-arcsec near the center of each affected slitlet (comprising ½ of all slitlets). While these were somewhat problematic, they can be compensated using standard dither/nod observing techniques. Furthermore, by slightly offsetting the flat field ...
Observers` Forum - British Astronomical Association
... curve3 shows a bright period in late 2005 declining through early 2006, and a low in 2006 September. However, it was observed by Privett as bright during 2007 October and was at that point seen to vary substantially in appearance over the course of a week (Figure 1). Starting in 2008 April there was ...
... curve3 shows a bright period in late 2005 declining through early 2006, and a low in 2006 September. However, it was observed by Privett as bright during 2007 October and was at that point seen to vary substantially in appearance over the course of a week (Figure 1). Starting in 2008 April there was ...
Larger, high-res file, best for printing
... Is it possible Cas A’s supernovae was unusually dim? Model calculations indicate that a delayed explosion after core collapse can result in gravitationally bound ejecta — within minutes of the explosion, much of the ejecta falls back onto the core. Since supernovae luminosity is proportional to the ...
... Is it possible Cas A’s supernovae was unusually dim? Model calculations indicate that a delayed explosion after core collapse can result in gravitationally bound ejecta — within minutes of the explosion, much of the ejecta falls back onto the core. Since supernovae luminosity is proportional to the ...
Far Ultraviolet Spectroscopic Explorer
... Dept. of Physics & Astronomy Johns Hopkins University Nov. 11, 2010 Hubble Science Briefing ...
... Dept. of Physics & Astronomy Johns Hopkins University Nov. 11, 2010 Hubble Science Briefing ...
Beyond the Hubble Space Telescope: Early
... and fashioning a generally larger version of Hubble was therefore an attractive option to at least explore. The limit to how big a mirror they might reasonably argue for would likely be set by the perceptions of what cost its patrons in the White House and Congress would support. On the other hand, ...
... and fashioning a generally larger version of Hubble was therefore an attractive option to at least explore. The limit to how big a mirror they might reasonably argue for would likely be set by the perceptions of what cost its patrons in the White House and Congress would support. On the other hand, ...
ISNS3371_040507_bw - The University of Texas at Dallas
... First Law. A luminous solid, liquid or gas, such as a light bulb filament, emits light of all wavelengths thus producing a continuous spectrum of thermal radiation. Second Law. If thermal radiation passes through a thin gas that is cooler than the thermal emitter, dark absorption lines are superimpo ...
... First Law. A luminous solid, liquid or gas, such as a light bulb filament, emits light of all wavelengths thus producing a continuous spectrum of thermal radiation. Second Law. If thermal radiation passes through a thin gas that is cooler than the thermal emitter, dark absorption lines are superimpo ...
The GMT Consortium Large Earth Finder Sagi Ben-Ami Smithsonian Astrophysical Observatory
... Sagi Ben-Ami Smithsonian Astrophysical Observatory ...
... Sagi Ben-Ami Smithsonian Astrophysical Observatory ...
The Gaseous Halo of NGC 891 Edmund Hodges-Kluck Joel Bregman
... accreted • The cold halo is not accreted, and it is not clear how the gas got there • NGC 891 is an important object, but the disk—halo cycle is messy ...
... accreted • The cold halo is not accreted, and it is not clear how the gas got there • NGC 891 is an important object, but the disk—halo cycle is messy ...
香港考試局
... adjustment, it is used to observe a distant object which subtends an angle of 0.5∘ when viewed directly. Which of the following statements is/are correct ? (1) The height of the first image formed by the telescope is 8.7 mm. (2) The lens with focal length 100 cm should be the eyepiece. (3) The angle ...
... adjustment, it is used to observe a distant object which subtends an angle of 0.5∘ when viewed directly. Which of the following statements is/are correct ? (1) The height of the first image formed by the telescope is 8.7 mm. (2) The lens with focal length 100 cm should be the eyepiece. (3) The angle ...
IRMOS: The near-InfraRed Multi-Object
... Figure 4 below shows the MOS probe optical layout in the same orientation as Figure 2. Light enters from the bottom of the figure and comes to a focus at the TMT focal plane. Just above this focal plane, the MOS pickoff mirror sends light down the length of the probe arm, where a doublet lens collim ...
... Figure 4 below shows the MOS probe optical layout in the same orientation as Figure 2. Light enters from the bottom of the figure and comes to a focus at the TMT focal plane. Just above this focal plane, the MOS pickoff mirror sends light down the length of the probe arm, where a doublet lens collim ...
up11_educue_ch34
... 3. an objective lens with a short focal length and an eyepiece lens with a longer focal length 4. an objective lens with a short focal length and an eyepiece lens with an even shorter focal length ...
... 3. an objective lens with a short focal length and an eyepiece lens with a longer focal length 4. an objective lens with a short focal length and an eyepiece lens with an even shorter focal length ...
Looking Further
... saw that it was covered in craters. Before this, people had thought that the moon was smooth. Over time, telescopes became bigger and better. In 1873, the Alvan Clark company’s refracting telescope helped scientists discover the two moons that orbit Mars. The Lick Observatory in California was built ...
... saw that it was covered in craters. Before this, people had thought that the moon was smooth. Over time, telescopes became bigger and better. In 1873, the Alvan Clark company’s refracting telescope helped scientists discover the two moons that orbit Mars. The Lick Observatory in California was built ...
PDF
... to be useful for astrometric purposes. The overwhelming majority of deep optical astronomical observations taken in the twentieth century, especially those with CCD technology, lacked such a precise reference frame. Hipparcos was very good but too shallow in terms of distance to stars in the galaxy. ...
... to be useful for astrometric purposes. The overwhelming majority of deep optical astronomical observations taken in the twentieth century, especially those with CCD technology, lacked such a precise reference frame. Hipparcos was very good but too shallow in terms of distance to stars in the galaxy. ...
D109-08x
... Astronomers studied the galaxy across several wavelengths to trace how stars, gas, and dust are being tossed around and torn from the fragile galaxy. The composite image at left shows long streamers of gas flowing from the galaxy as it travels through the cluster, called Abell 2125. Hot gas from the ...
... Astronomers studied the galaxy across several wavelengths to trace how stars, gas, and dust are being tossed around and torn from the fragile galaxy. The composite image at left shows long streamers of gas flowing from the galaxy as it travels through the cluster, called Abell 2125. Hot gas from the ...
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).