... 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. ...

... ASTRONOMICAL TELESCOPES . ... HOME . ... Home Products Telescopes Astronomical Telescopes . Recreational astronomical telescopes (ASTELE™) feature Maksutov Cassegrain or Maksutov Newtonian optical design. ... These telescopes (except ASTELE ™ 70, 95) are available in three configurations: OTA (Optical Tube Assembly), G (German Equatorial Mount) and EL (with motorized base). ... These telescopes are available in two configurations: OTA (Optical Tube Assembly) and G (German Equatorial Mount). ...

... SATELLITE: An object that revolves around a planet. ... SIDEREAL DAY: The length of a planet's rotation period relative to the stars. SOLAR SYSTEM: The sun and all the objects that are held in its gravitational field and move around it. ... SUPERIOR CONJUNCTION: The position of a planet when it is on the opposite side of the Sun from Earth (thus making in invisible). ... TRANSIT: The movement of an object between the Earth and the Sun and showing on the surface of the sun as a black dot. ...

Sternberg astronomical institute activities on site testing programs review Victor Kornilov comprehensive/characterization/of/astronomical/sites > kislovodsk/russia/2010/october/4-9 > Introduction This presentation responds on our activity in 5 last years only, inspite of that in SAI site testing researches have been started many years ago. ... More detailed discussion is devoted to MASS and DIMM measurements processing, some additional effects which were taken in account in last year. ...

... Moon . ... Monthly Sky Notes . ... On 2 July, the night sky will be filled with the light of the Moon, so get out your telescopes and binoculars and have a look at our wonderful, natural satellite. ... On 16 July will see all the stars on display in our sky, as there will be a New Moon. ... One of the most notable patterns in the sky is now very visible in the month of July, the Summer Triangle. ... The proper definition of a Blue moon is when a full Moon appears in the sky twice in one month. ...

... Phase Diversity Imaging: Real Time Correction of the Atmosphere and Telescope . Dr. Robert A. Gonsalves . ... Join us this month for what promises to be an engaging talk by Dr. Robert A. Gonsalves, “Phase Diversity Imaging: Real Time Correction of the Atmosphere and Telescope.” Phase diversity imaging uses multiple images of an object to combat the deleterious effect of the changes in the atmosphere and telescope. ... Copyright (c) Amateur Telescope Makers of Boston, Inc. ...

Supernova 1999em in NGC 1637 . This page is devoted to information on Supernova 1999em in NGC 1637 Basic information on this SN, including the last reported brightness, on this Supernova can be found on the main main page . Information on the original web pages for many of these images can be found on the Supernova links web page. ... LOSS image . ... vsnet-alert 3639 ] SN 1999em in NGC 1637 . vsnet-alert 3640 ] SN 1999em in NGC 1637 . ... vsnet-recent 39999 ] SN1999em recent (cont'd) . ...

December: A Significant Month in Apollo . In 1968 and 1972, the month of December marked two significant events in NASA history?the first and last missions to the Moon. ... When they announced Apollo 8, I just couldn't believe it, but we were all over George Low to go try it, because we were young enough to try anything. ... http://www.jsc.nasa.gov/history/apollo8_mp3/apollo8.htm . ... http://www.jsc.nasa.gov/history/HouHistory/HoustonHistory-Fall08.pdf . ... Return to JSC History Portal . ...

... Nikolaev 2.8 USNO 104 Italy, San 0.40 21 x 21' 2.5 10 32 0.253 0.436 Marccello 2.0 GSC 106 Slovenia, 0.36 36 x 36' 2.0 2235 9264 0.307 0.295 Crni vrh 2.4 USNO 113 Germany , 0.50 13 x 10' 2 42 283 0.260 0.319 Schonbrunn 2.3 USNO 114 213 1172 0.260 0.222 118 Slovakia, 0.57 14 x 10' 1.7 7 42 0.165 0.077 Modra 3.3 USNO 130 Italy, 0.4 15 x 10' 1.0 9 36 0.284 0.275 Lumezzane 1.8 ... 1.8 UCAC A24 New Millennium 0.36 12 x 12' 1.4 86 399 0.341 0.284 Obs., ... 3.5 UCAC H15 ISON-NM Obs., ...

... The caption to Color Figure 3 refers to the source 1928+734, which should be 1928+738. In the summary section on page 49 (Murphy et al.), the sentence "In that time, we have observed a variety of structural changes in the inner jet region near the region." should read "In that time, we have observed a variety of structural changes in the inner jet region near the core." In the references on page 175 (Fomalont et al.) and page 182 (Moellenbrock et al.) ...

Truebloodb,g, K. Zelayab Department of Astronomy, The Ohio State University, 140 West 18th Avenue, Columbus, OH 43221 USA; bNational Optical Astronomy Observatory, 950 North Cherry Street, Tucson AZ 85719 USA; cCerro Tololo Inter-American Observatory, Casilla 603, La Serena ... USA ABSTRACT We describe the design, construction and measured performance of the Kitt Peak Ohio State Multi-Object Spectrograph ( KOSMOS ) for the 4-m Mayall ... Optical layout for KOSMOS and COSMOS. ...