These lamp spectra are compiled from imagestaken during February and June 1996. The images were taken with the newest lamp configuration (lamps pointed down toward closedmirror covers). Spectra listed in boldface were taken throughthe 1.6 arcsec slit. All other spectra were taken through the 1.0arcsec slit. Low Dispersion . High Dispersion . LAMP . BLUE . ... 4400 . 7700 . ... High resolution He spectra can be found on the Old APO LampSpectra page. ...

... Meade f/6.3 Focal Reducer/Field Flattener . ... Meade f 6.3 Focal Reducer/Field Flattener #07545. ... An important advancement in high-resolution focal reduction systems, the Meade 4-element, multi-coated f/6.3 Focal Reducer/Field Flattener threads on to the rear cell of any LX90, LX200 or other Schmidt-Cassegrain or Advanced Coma-Free model and is typically used with an Off-Axis Guider or T-Adapter. Reduces the telescope's focal ratio by a factor of 0.63: f/10 telescopes are converted to f/6.3. ...

... A hundred years later, a handful of Tunguska-sized asteroids have been spotted by telescopes, but most remain unseen. The asteroid designated 2008 TC3 , which made the news on October 6th before colliding with the Earth on October 7th was too small to constitute a part of the "Earth impact hazard". ... 2008 TC3, for example, finally exploded in the atmosphere above Sudan . ... Wednesday, 8 October 2008 01:15 . International Year of Astronomy, Ireland National Node . ...

... Class . ... CONSTR | METHOD . ... java.lang.Object ij.plugin.ScreenGrabber . ... PlugIn . public class ScreenGrabber . ... This plugin implements the Image/Flatten, Plugins/Utilities/Capture Screen and Plugins/Utilities/Capture Image commands. ... ImagePlus . ... This method is called when the plugin is loaded. 'arg', which may be blank, is the argument specified for this plugin in IJ_Props.txt. ... Captures the entire screen and returns it as an ImagePlus. public ImagePlus captureImage () . ...

. 02jul08 . lbw failed three times between 20jun08 and 01jul08. The crosshead was replaced on each warm. The plots show t he cooldown times for the 16K and omt stages (.ps) ( .pdf ): . On the second two cooldowns the omt cooldown rate flattened out around 180K instead of going all the way down to 80K processing: x101/080702/chklbwtemp.pro . pageup . home_~phil

... Tonight's Sky . ... Astronomy for Kids . ... The Sunт??s almost perfectly round shape baffles scientists . ... This tiny flattening has been studied with many instruments for almost 50 years to learn about the Sunт??s rotation, especially the rotation below its surface, which we canт??t see directly. ... Only registered members of Astronomy.com are allowed to comment on this article. ... Receive news, sky-event information, observing tips, and more from Astronomy's weekly email newsletter. ...

... This is usually defined as the direction pointing toward the center of the primary body. ... NODE: The place where the plane of one orbit crosses the plane of another. ... ORBITAL PLANE: The flat surface that would result if every point on the orbit of a body was connected to the center of its primary. ... PENUMBRA: The edge of the primary body's shadow. ... PERIOD : The time required for one body to orbit the primary body. ... PROBE: A vessel designed to pass and observe an astronomical object. ...

Precision Telescope Control System PTCS Project Note 51.1 A Preliminary Analysis of the Correlation Scales of Wavefront Errors of the GBT Using the Moon Bojan Nikolic, Dana S. Balser & Richard M. Prestage 27 June 2006 GBT Archive: PR063 File: PROJECTS Keys: PTCS, OOF Abstract Observations of the GBT error beam are performed using the Moon to explore the spatial scales in the aperture plane over which the dominant wavefront errors are correlated. ... The expected observed scan is shown in Figure 7. ...

... The picture shows a 2-dimensional sketch of the outflowing wind of a quasar (Elvis 2000, Astrophysical Journal , vol.545, p.63-76). In the funnel-shaped disk wind Elvis (2000) model a wind arises from a restricted range of radii on the accretion disk around the central black hole. Initially the wind makes a large angle to the disk plane (and so is roughly cylindrical). ... Looking through the quasi-cylindrical part of the wind we see UV and X-ray warm absorbers. ...

... Our Galaxy . ... Stars . ... We all love bright and showy spiral galaxies! So much so, that we tend to overlook the elliptical galaxies which make up about 30% of the galaxies out there. Smaller than spiral galaxies, elliptical galaxies may be full of stellar living fossils, surviving virtually unchanged from an older cosmic era. ... Elliptical galaxies are smaller than spiral galaxies, roughly spherical and full of old stars. ... We know that galaxies interact and even collide. ...

... In summer 1994, the biggest news in astronomy was the collision of comet Shoemaker-Levy 9 with Jupiter. During this school year, Jupiter will charge back into the limelight with the arrival of the Galileo spacecraft (see figure 8 ). On Dec. 7, following a tortuous six-year ramble through the solar system, Galileo will begin its two-year mission studying Jupiter and its gaggle of moons. ... Besides the camera, Galileo will carry instruments capable of identifying minerals on Jupiter's moons. ...

... Bad Astronomy . ... News . ... In the following article, I used the wrong number to get the circumference of the Earth at the latitude of Cape Canaveral, which ironically is what I accuse Ms. vos Savant of as well! ... At the Equator, the Earth spins at 1000 miles per hour (the Earth is 24,000 miles around, and spins once every 24 hours). ... The math is a wee bit hairy, but not too bad, to calculate the circumference of the Earth at Cape Canaveral assuming the Earth is an ellipse with these numbers...

JSC Celebrates 40 Years of Human Space Flight . ... On July 7, 1961, NASA Administrator James E. Webb directed the establishment of preliminary site criteria and a site selection team. ... The Mercury-Atlas 6 mission marked the free world's first orbital manned flight. ... This is one of several edifices located around Houston and southern Harris County that served as temporary office facilities for the early Manned Spacecraft Center (MSC) while the present 1625-acre site was being developed. ...

MULTISCOPES . ... HOME . ... ABOUT LOMO . ... Home Products Microscopes Multiscopes Trinocular Head HT-30 . ... The HT-30 Trinocular Head , with its superb field flattening ability, is designed to work with LOMO microscopes as well as with other brands equipped with a universal dovetail mount. ... The head incorporates a revolving Magnification Changer with three settings and a sliding Optical Path Selector (OPS) which controls the light distribution between the binocular and the photo/video channel. ...