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. ...

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. ...

... A time series analysis is applied to the photometric data obtained by the HST Fine Guidance Sensors (FGS), in order to discover new variable stars and to derive information about microvariability of a large sample of objects. ... Our project is based on a time series analysis of all data sets recorded by the FGSs in order to detect variability among the used Guide Stars. ... Based on ESO 1.5m Danish DFOSC photometry, we have verified variability for three Guide Stars. ...

... 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. ...

... December 12, 1998 . Driving To The Sun . ... Explanation: How long would it take to drive to the Sun? ... Let's see ... the Sun is 93 million miles away . So, if we drove 93 miles per hour the trip would only take us 1 million hours." ... One hundred years would be 876,000 hours, still a little short of the 1 million hour drive time -- so the Sun is really quite far away . ... You've got to be impressed by something that's 93 million miles away and still hurts your eyes when you look at it ! ...

Astronomy Picture of the Day . Ganymede: A Really Groovy Moon . ... Credit: Galileo Mission Team , Galileo Spacecraft , NASA Explanation: Ganymede's surface is a wrinkled mess. As large ice-sheets shift on the moon's surface , parts of the surface buckle causing high ridges, deep furrows, and parallel grooves. ... The Galileo spacecraft has also just discovered that Ganymede has a region of orbiting charged particles called a magnetosphere - a first for any moon. ... NASA Official: Jay Norris. ...

... 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. ...

... 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 . ...

... ESO Science Newsletter August 2014 . 28 Aug 2014 . ... This newsletter is a summary of recent ESO Science Announcement items. Follow the links or visit ESO Science Announcements to read more. ... ALMA Early Science observations, Cycle 1 and Cycle 2, will be interrupted, as foreseen, from the beginning of September until end of November. ... ESO Workshop, Vitacura, Santiago, Chile, 13тАУ17 April 2015 . ... You are receiving this newsletter because you subscribed to the ESO Science Newsletter. ...

The HyperNews Linux KHG Discussion Pages . Forum: The Linux Kernel Hackers' Guide . Re : Realtime mods anyone? ( bill duncan ) . ... Keywords: realtime FIFO scheduling . ... I have recently been working on system to implement Real-Time computer control using Linux 1.2.13 with the POSIX.4 (should that be .1b ?) FIFO scheduler. ... I also have the usual system running doing various things, and have not experieneced any unpredictability down to sampling intervals of 10ms. ...

The skycat techical documentation, like the application itself, is divided into five parts. Skycat is based on the Real-Time display and Catalog Library packages, which are in turn based on two utility packages: one general purpose and one for astronomy related utilities. ... Skycat - Combines the rtd image display features with catalog searching features for the skycat application . Catlib - Astronomical catalog library and widgets for searching catalogs and browsing catalog directories . ...

... 8, ``Celestial Mechanics'', 2002 Superosculating intermediate orbits and their applications to study the perturbed motion V. A. Shefer Research Institute of Applied Mathematics and Mechanics, Tomsk State University, Tomsk, Russia A method of construction of intermediate orbits for approximating the real mo­ tion of celestial bodies in the initial part of trajectory is described. ... Sh