The nasa.gov site requires that JavaScripts be enabled in your browser. ... Contact NASA . ... The term "astronaut" derives from the Greek words meaning "space sailor," and refers to all who have been launched as crew members aboard NASA spacecraft bound for orbit and beyond. Since the inception of NASA's human space flight program, we have also maintained the term "astronaut" as the title for those selected to join the NASA corps of astronauts who make "space sailing" their career profession. ...

... Armagh Observatory, College Hill, Armagh BT61 9DG, +44 (0)28 3752 2928 . ... Risks Comparable to NEOs . ... The Increasing Rate of Discovery of Asteroids . ... Comet and Asteroid Collision Probabilities . ... Extreme albedo comets and the impact hazard (PDF Format) . ... Asteroid Impact Animations . ... Workshop on Scientific Requirements for Mitigation of Hazardous Comets and Asteroids - 2002 . ... The Spaceguard Survey Report, 1992 (PDF) . Tsunami from Asteroid/Comet Impacts . ...

Please enter the lightcurve file name and period search parameters: . Lightcurve file: . ... Apply the Heliocentric correction and convert all dates to Terrestrial Time (TT)? ... Also, the Heliocentric correction cannot be applied to such lightcurves. ... This period search service is also available at the mirror sites: Mirror 1 , Mirror 2 , Mirror 3 , Mirror 4 . You may download the latest source code distribution and install the period search service at your own web server. ...

Motif and X-Windows . The applications described in this section are some of the many applications available. ... A DECterm session can be created by choosing the DECterm submenu item the Session Manager's Application menu or by using the CREATE/TERMINAL command at the system prompt. ... The CDA Viewer application displays the contents of compound documents consisting of graphics, images, and text. ... Ghostview is an application that displays PostScript documents using ghostscript. ... DECterm . ...

... March 31, 1996 . Comet Hyakutake Finder Chart for April . Credit: HST Comet Hyakutake Observing Team and NASA . ... Explanation: During April Comet Hyakutake heads in toward the Sun after passing the Earth . ... Early in April, the Moon 's glow will diminish viewing of the comet's tail - except during the lunar eclipse on April 3rd ! As the comet recedes from the Earth it will appear dimmer even though it is getting intrinsically brighter as it nears the Sun. ... About APOD | ...

... Comet Hyakutake on a Starry Night . ... 23.04.1996 . ... Credit: Vic Winter , Courtesy ICSTARS Explanation: It was a starry night in April (April 9th, 1996, 9:32 pm CDT to be exact) near Lone Jack, Missouri when Comet Hyakutake graced this astronomically rich field . ... Latest Comet Hyakutake images: APOD Hyakutake Archive, JPL , Fayetteville Observer-Times , NASA's Night of the Comet , ICSTARS , Jerry Lodriguss , ScienceWeb , Crni Vrh Obs. ... Publications with keywords: comet - comet Hyakutake . ...

... Planets . ... The planets were found using the HARPS instrument on the 3.6m telescope at ESOтАЩs La Silla Observatory. ... A planet in orbit around a star causes the star to regularly move towards and away from observers on Earth. ... One newly discovered planet, HD 85512 b, is best hope found so far for a habitable exoplanet. ... The HARPS team so far have found that about 40% of stars similar to own Sun have at least one planet smaller than Saturn (which is 95 times more massive than Earth). ...

... Table 1: Acceptable temperature difference Invar36 0 .0 5 C А (the CTE was selected as 0.7 for the FEA) Stainless Steel 304 0.002 CА(the CTE was selected as 17.2 for the FEA) Aluminium6061 0.0015 CА(the CTE was selected as 23 for the FEA) (2) Analysis of the temperature gradients of the mount generated by an ambient temperature difference of 0.5 CА on both sides of the mount Invar , S.S. or Al ... Stainless steel material is added to Table 4 and 5 for comparison with Invar. ...

... Up: Science Software Applications . ... It has extensions for creating GUI (Tk) and object-oriented ([incr tcl]) applications. Several Tcl-based tools that may be used for astronomical and other scientific applications have been created and are discussed. One example is ptcl , which registers PGPLOT functions as Tcl commands, creating a powerful interactive plotting package. ... Both programs use the same C code, Tcl commands, and [incr tcl] classes; only the GUIs are different. ...

Lunar Orbiter to the Moon (1966 - 1967) . ... Five Lunar Orbiter missions were launched in 1966 through 1967 with the purpose of mapping the lunar surface before the Apollo landings. ... The first three missions were dedicated to imaging 20 potential lunar landing sites, selected based on Earth-based observations. ... The Lunar Orbiters had an ingenious imaging system, which consisted of a dual-lens camera, a film processing unit, a readout scanner, and a film handling apparatus. ...

... Its perihelion would occur on April 1, 1997, at which point the comet would be only 0.92 astronomical units from the Sun, just within the orbit of Earth. ... Taken in April 1993, the photo showed the comet over 13 astronomical units from the Sun, well beyond the orbit of Saturn. ... Hale, as in Comet Hale-Bopp, has written a book, Everybody's Comet (available through the ASP Catalog) and coordinated an Internet project, "Hale-Bopp: Live in the American Classroom." ... Anatomy of a comet. ...

... Northern Eurasian GOFC/GOLD Fire Network Workshop in support of the Northern Eurasia Earth Science Partnership Initiative ( NEESPI ) . Satellite-based fire monitoring network in Northern Eurasia: Methods, Data Products, Applications . ... Operational systems of fire monitoring and fire situation in Northern Eurasia (Issues of system building and functioning, fire situation, available data and problems) . ... Marchenko N., Landscape-ecology methods for forest fires monitoring in Northern Eurasia. ...

For circular orbits around Earth, we found . ... The distance of a satellite from the center of Earth in meters is an inconveniently big number, even before we raise it to the 3rd power. ... SQRT (25 638 838) = 5063.5 From this . ... T= 5063.5 seconds SQRT(r') 3 = 5063 sec r'SQRT=(r') . This is the practical form of Kepler's 3rd law for Earth satellites. ... International communication satellites are in the equatorial plane of the Earth and have orbits with a 24-hour period. ...

... Often it is convenient to edit one visibility dataset (``the template''), and then to apply the flagging from this to another. For example, forming and flagging a ``channel-0'' dataset might be less painful than flagging a huge spectral line dataset. ... The task that can do these sorts of operations if uvaflag - it matches visibilities in the template and the input, and flags those visibilities in the input that are flagged in the template. ... Dataset to be flagged. tvis=multi.chan0 . ...

... The Australian National University] [Department of Physics] [Paul Francis] [Main Roleplay Page] . These exercises are my attempt to adapt the technique of Problem Based Learning to the context of introductory astronomy and astrophysics classes. ... As students grapple with the puzzle, they are forced to learn the subject matter of the course. ... This exercise is designed for 1st year University students with a reasonable high-school background in Maths and Physics. ...

... The Russian Academy of Sciences, Federal Space Agency (ROSCOSMOS), the Ministry of Defense of the Russian Federation, the Ministry of Communications and Mass Media of the Russian Federation (MINCOMSVYAZ), Federal Agency on Technical Regulating and Metrology (ROSSTANDART), Federal Service for State Registration , Cadaster and Cartography (ROSREESTR), Scientific Council of the Russian Academy of Sciences on PNT problem and the ... Ipatov А. V. (Institute of Applied Astronomy of RAS) ? ...

This is a copy of a Press Release from E.S.O. The most recent ESO observations of bright Comet Hyakutake have shown rapid changes in the innermost coma, within a few hundred kilometres from the cometary nucleus. This result has only become possible because of the unusual combination of a bright comet being near the Earth, together with the excellent imaging quality of the ESO 3.5-metre New Technology Telescope (NTT). ... Go to the ESO Homepage for Comet Hyakutake . ESO/La Silla | ...

... Comments, Opinions Publications Dnepr Program . Dnepr launch record 17 August 2011. Cluster Launch of Dnepr LV 22 August 2013 KOMPSAT-5 Launch 21 November 2013. Dnepr Cluster Mission 2013 19 June 2014. ... ISC Kosmotras announces signing of a launch contract with T B?TAK Space Technologies Research Institute (T B?TAK UZAY) for injection of RASAT spacecraft - the first Earth observation satellite designed and manufactured in Turkey by Dnepr LV in 2010. ... Dnepr LV Performance . ...

... Posts tagged ?model based? ... arXiv:stat.ME:0910.2585] . Variable Selection and Updating In Model-Based Discriminant Analysis for High Dimensional Data with Food Authenticity Applications . ... Category: Algorithms , arXiv , Cross-Cultural , Data Processing , Jargon , Methods , Spectral , Stat | ... Tags: bimodality , chi-square minimization , Classification , CMD , Estimation , machine learning , massive data , model based , PCA , spectral analysis , spectroscopic , survey , VO . ...

... exoplanets . ... Ground-based detection of super-Earth transit paves way to remote sensing of small exoplanets . ... The transit of exoplanet 55 Cancri e is the shallowest detected from the ground yet, and the success bodes well for characterizing the many small planets that upcoming space missions are expected to discover in the next few years. ... Until now, the transits of only one other super-Earth, GJ 1214b circling a red dwarf, had been observed with ground-based telescopes. ...