... The hexagonal (rhombohedral) form of aluminum oxide is variously called alpha-Al 2 O 3 , alumina (usually applied to the non-fully-dense polycrystalline ceramic), corundum (mineral name), ruby (red [chromium containing] corundum), or sapphire (blue corundum; also frequently used to denote the pure, synthetic crystal). ... The high mechenical and dielectric strength of aluminum oxide make it a desirable laser host material. ...

Main . ... About meteorites . Collections . Museum . The Museum of Extraterrestrial Material . Main menu . Museum of extraterrestial material . ... About the laboratory . ... Lunar sample collection . Meteorite collection . Meteorite encyclopedia . Meteorite web resources . ... Address: 119991, Moscow, Kosygin St. 19, Vernadsky Institute, . Meteorite Committee. To arrange a visit to the museum, please call . ...

. Search this album . Gallery . :: Stromlo Reconstruction . :: Demolition of houses . :: Toxic materials were sealed in drums before dтАж . Sidebar Left . Sidebar Top . No Sidebar . Sidebar Bottom . Sidebar Right . View full size . Title: Toxic materials were sealed in drums before disposal. File name: DSCN1188.jpg . Dimensions: 432 x 324 px . Page: 1 2 3 4 5 6 7 8 9 10 62 63 . Powered by Gallery 3.0.9 (Chartres) . Login

... We show how wavelength-dependent time delays between continuum flux variations of active galactic nuclei (AGNs) can be used to test the standard black hole--accretion disc paradigm, by measuring the temperature structure T(R) of the gaseous material surrounding the purported black hole. ... We assume that the observed time delays are indeed caused by a classical accretion disc structure, and derive a redshift-independent luminosity distance to NGC 7469. ...

. Normally, galaxies use their reservoirs of hydrogen gas to create new stars, but NGC 4569 (center) is missing most of its required material. The red structure on the right is the hydrogen gas that was stripped away when NGC 4569 rammed through a cluster of galaxies. CFHT/Coelum

... Unknown Dark Material on Mercury . ... 6.07.2009 . ... Credit: MESSENGER , NASA , JHU APL , CIW Explanation: What is that strange material on Mercury? ... Pictured above on the lower right, a large crater -- about 100 kilometers across -- has unusual dark material of unknown composition near its center. ... One origin hypothesis is that the dark material was uncovered from beneath Mercury's surface during the impact that created the surrounding crater. ... Publications with keywords: Mercury . ...

... Black dotted squares with digital inside represent brightening events studied in the paper. ... The contours draw the coronal hole boundaries. ... 2007 (X-ray bright point in coronal hole. ... 2007 (X-ray bright point in coronal hole, which shows a clear example of magnetic flux emergence. ... 2007 (X-ray jet in coronal hole. ... gif (81 MB) . ... jpeg . ... pdf . ... In some movies, there is a black square on magnetograms in order to highlight the region associated with the brightening event. ...

Next: Exercises - Using X WindowsEditing and Up: About This Course Previous: About This Course . Obviously you have been provided with the course notes that you are reading. In addition several on line facilities will be employed in this course. Ceilidh - an online tutoring and program marking facility (see Appendix for details. All exercises given can be answered in Ceilidh. Some alternative C course notes are also available. ... The course notes are also on-line. ...

The IAA RAS . ... Academic senate . Dissertation council . Council of young scientists . ... International collaboration . Memberships in international organisations . ... Awards and honors . Government awards . The IAA RAS Medal . ... Astronomical Yearbook . Nautical Astronomical Alamanac . Naval Astronomical Yearkbook . ... The IAA RAS journal . ... Council of yound scientists . ...

ATM Forum Message . Forums: . ... Post . ... Tool Base Material? ... Post Message | ... I've used Pour Stone in the past to make grinding and pitch lap tool bases. ... The pour stone tools worked quite well, but I've read about dental stone and that it doesn't need to be sealed and it doesn't seem to take very long to set up. ... www.astronomy.net . ... Forum posts are Copyright their authors as specified in the heading above the post. "dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET" . ...

Microsymposium 34, MS058, 2001 ANOMALIES OF THE MOON'S THERMAL EMISSION IN THE IR SPECTRAL RANGE (10.5 - 12.5 micron). ... Sternberg State Astronomical Institute, Moscow, 119899, Russia, pugach@sai.msu.ru Summary: New satellite measurements of the lunar-surface radiation temperature were used to construct the spatial angular function of thermal radiation of the Moon in the infrared (10.5-12.5 micron) spectral range. ... These thermal anomalies are observed only in the limited range of phase angles. ...

Home About Meade Product Information Dealer Locator Customer Support Investor Relations Dealer Support Employment Opportunities Site Map . Meade Instruments Corporation . ... Meade Binocular Limited Warranty . ... Meade will repair or replace the product, or part thereof, found upon inspection by Meade to be defective, provided the defective part or product is returned to Meade, freight prepaid, with proof of purchase. ... This warranty supersedes all previous Meade binocular war