... In this final issue of the year, we consider the Moon's alien surface features, (so different from those we're used to on Earth) and review the golden age of lunar exploration. ... From 1959 (when the Luna 1 probe made the first flyby of the Moon) until 1976 (when Luna 24 returned the last lunar sample to Earth), 32 unmanned probes and 9 manned missions to the Moon or near-Moon space were successfully carried out. ... Luna 1 . ... First flyby of Moon . ... Flyby; first photographs of Moon's farside ...

... Abstract Compute the rectangular coordinates of the sub-observer point on a target body at a particular epoch, optionally corrected for planetary (light time) and stellar aberration. ... Return the geometric sub-observer point on the target body. ... Particulars subpt_c computes the sub-observer point on a target body. The sub-observer point is commonly called the sub-spacecraft point when the observer is a spacecraft.) subpt_c also determines the altitude of the observer above the target body. ...

Dr. Randall Smith . ... High Energy Astrophysics Division . Smithsonian Astrophysical Observatory . Cambridge, MA 02138 . ... Software . X-ray Astronomy Schools . AtomDB . AtomDB is an atomic database useful for X-ray plasma spectral modeling. simx . ... The purpose of `xscat' is to calculate the X-ray scattering cross section of a population of dust grains as a function of energy, given a specific dust grain position and an extraction region. acx . ... Dept. of Astronomy | ...

... Contacting and discussing with people sharing your interests, participating in night sky observations with telescopes as well as a large choice of astronomical books, magazines and video-tapes out of our club library. ... A reasonable compromise for observing both planets and brightest deep sky objects ( nebulae, galaxies) are either a 4 to 8 inch mirror telescope ( Newton, Schmidt-Cassegrain ) or a 3 to 4 inch refracting ( lens) telescope. ... Where can I buy a telescope in Luxembourg ? ...