... Tonight's Sky . ... Observing . ... Sky this Month . ... The Sky This Week: April 1 - 10 . ... Sky this Week . Observing Podcasts . ... Astronomy for Kids . ... Observing springtime deep-sky objects with a large telescope . Springtime observing for small telescopes . ... Seasonal Observing . ... Observing Basics . ... International School of Advanced Studies, Trieste, Italy . ... Receive news, sky-event information, observing tips, and more from Astronomy's weekly email newsletter. ...

Location and Travel . The workshop will take place at the Arecibo Observatory about 10 km south from downtown Arecibo . ... If you intend to stay at the observatory make sure you make your arrangements in advance! (see Accommodations for details) . ... Also, in order to have everyone staying at the Observatory, participants who are willing to share rooms and have a particular roommate you may wish to share the room with, please make sure to tell Carmen Torres or Eva Robles. ...

... Stellar Evolution is driven entirely by the never ending battle between Pressure and Gravity . As imbalances are reached, the star is driven to find a new Energy source. ... Pressure and gravitational forces are equal, the star is stable and its core is sufficiently hot to fuse Hydrogen into Helium More about main sequence stars . ... The luminosity generated by the core fusion of Helium into Carbon is far greater than the shell luminosity associated with the fusion of Hydrogen into Helium. ...

ACS Insturment Handbook for Cycle 24 . ... Advanced Camera for Surveys Instrument Handbook for Cycle 24 > Chapter 3: ACS Capabilities, Design and Operations > 3.1 ACS Location in the HST Focal Plane . ... ACS Location in the HST Focal Plane . ... The relative locations of the science instruments in the focal plane and their fields of view are shown schematically in Figure 3.1 . ... Figure 3.1: The HST field of view with the locations of the SI and the FGS apertures in the (U2,U3) focal plane. ...

... About ATMoB . ... Events . ... Located in Westford, MA, less than an hour's drive from Boston. The clubhouse is maintained for members, but any non-member may visit with a member or by other prior arrangement (see the Contact Us page). The clubhouse is located on the grounds of MIT's Millstone farmhouse in Westford, MA. ... View sky above the clubhouse. ... Upcoming Clubhouse Events.. ... About the Club . ... ATMoB Club House . ... Copyright (c) Amateur Telescope Makers of Boston, Inc. ...

Hallerstrasse 6 · CH-3012 Bern · Switzerland ISSI Call for Proposals 2015 for Johannes Geiss Fellowship The International Space Science Institute is an Institute of Advanced Studies located in Switzerland. ... Purpose ISSI has approved the introduction of the Johannes Geiss Fellowships (JGF). ... ISSI has a visitor programme, funds post-doctoral fellows, and encourages the participation of young scientists in the International Teams. ... Financial support requested from ISSI. ...

... The Advanced Visual Systems (AVS) has been used to explore lines of sight through the complex geometry of the Green Bank Telescope (GBT). Perspective images computed by AVS from geometric descriptions of the components of the telescope have been used when selecting locations for the installation of laser rangefinders and when checking geometrical relationships along the optical path. ... The AVS ``camera'' could be commanded to look from any location in the scene toward any another location. ...

T he Siding Spring Survey (SSS) is a Near-Earth Object search program that utilises the 0.5-m Uppsala Schmidt Telescope at Siding Spring Observatory, N.S.W., Australia. ... The mission of the Siding Spring Survey is to contribute to the inventory of near-earth objects (NEOs), or more specifically, the potentially hazardous asteroids (PHAs) and comets (PHOs) that may pose a threat of impact and thus harm to civilization. ... Based on the CSS Mission page . ... Siding Spring Survey Main Page . ...

The sections <Directory> , <Location> and <Files> can contain directives which only apply to specified directories, URLs or files respectively. Also htaccess files can be used inside a directory to apply directives to that directory. ... The order of merging is: . ... If multiple <Directory> sections apply to the same directory they are processed in the configuration file order. ... Using the options in question is only possible inside a <Directory> section (or a .htaccess file). ...

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... The very first thing you should do now is to locate the limits of your slitlets because this information is needed for all further commands. ... LOCATE/MOS . ... Then you should have a look at your flat field and try again with . ... OFFSET/MOS . ... The results are stored in the frame . If you have not written anything to this keyword it will derive the name of the normalized flat field by adding an `n' to the name of the input flat (e.g. nmosff1 ) and write the name to . ... FLAT/MOS . ...

. Unix commands are executable binary files located in directories with the name bin (for binary). Many of the commands that you use are located in the directory /usr/bin . When you enter the name of a command the shell checks to see if it is a built-in command. If it is not, it looks for the the binary file that the command name refers to in each of the directories that are defined in the PATH environment variable . more ...