... Tonight's Sky . ... Observing . ... The double star 54 Leonis, spiral galaxy NGC 3198, and emission nebula NGC 3199 . ... The Real Reality Show: Would aliens be anything like us? ... The Real Reality Show: All about the Drake Equation . ... The Real Reality Show . ... The Real Reality Show: Matter and Energy . ... Only registered members of Astronomy.com are allowed to comment on this article. ... Receive news, sky-event information, observing tips, and more from Astronomy's weekly email newsletter....

... You are here: start €Ё lbaops €Ё lbamar2013 €Ё v255r . ... VLBI Schedule . ... Observer's Wiki . ... lbaops:lbamar2013:v255r . ... Channel 1 . IFP#1-LO 6300 - 6316 MHz USB RCP . ... IFP#2-LO 6642 - 6658 MHz USB LCP . ... IFP#2-HI 6658 - 6674 MHz USB LCP . ... 6316 & 6658 MHz . ... 6642 - 6658 MHz USB RCP . ... 6642 - 6658 MHz USB LCP . ... 6658 - 6674 MHz USB RCP . ... 6658 - 6674 MHz USB LCP . ... IFP#1-LO 6642 - 6658 MHz USB RCP . ... Ftp: ftp://ftp.atnf.csiro.au/pub/people/vlbi/v255/v255r . ...

Next: When the clock is Up: Keeping Time Previous: The hardware and software . In the Debian system, the system time zone is determined by the symbolic link /etc/localtime љ . ... If it is unset, the system time zone is assumed. ... The date љ command shows the current date and time. ... date љ is also used to set the kernel's software clock: # date 07142157 . ... While each user can have his own time zone, the clock is the same for everyone. date љ only shows or sets the software clock. ...

... Circle area is proportional to the number of tweets + retweets tweets retweets . Order accounts: by user number (effectively random) by number of tweets (includes retweets) by number of followers by number of followers that also tweeted about AAS223 by number of friends that also tweeted about AAS223 . ... The top/left position is for the user with the largest number of followers, and the bottom/right is for the smallest number of followers. by number of followers that also tweeted about AAS223 . ...

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 | ...

Classroom Activity: A Viewgraph Comet . ... This will simulate the Earth's orbit around the Sun. ... Draw several comets along the path with their tails pointing away from the Sun. ... You can create other viewgraphs that have a smaller scale and show several comet orbits or constellations. ... Show how the Earth's orbit is almost circular compared to the comet's. Explain that the Sun is at the focus of the orbits of the planets, asteroids, and comets. ... Actually, comets have two tails. ...

This animation shows a binary star being lensed by a binary lens. ... The sharp changes in the size of the lensed images of the stars lead to sharp changes in the brightness of the stars, which can be analyzed to determine many parameters about the objects doing the lensing, even though they are not bright enough to be seen. ... The graph shown above gives the predicted and observed brightness of a star in the Small Magellanic Cloud being magnified by a binary lens. ... Tutorial : Part 1 | ...

... 24sep08: long recovery vs alfa rotation angle. ... On 23sep08 around 14:00 hours data was taken with alfa on the sky to see how long the recovery took. ... 2 172 MHz Bands per beam . ... On 24sep08 around 17:00 data was taken with alfa and the pdev spectrometer to measure the long recovery time versus the rotation angle of alfa. ... As alfa rotates, different beams have larger/smaller recovery times. ... This is the same data as the total power plots above. beam 0 alfa rotation= 0 deg . ... page up ...

... Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. 2012 June 26 . A Sundial that Shows Solstice . ... If the time and day are right, this sundial will tell you: SOLSTICE . Only then will the Sun be located just right for sunlight to stream through openings and spell out the term for the longest and shortest days of the year. ... Resource Guide: NASA Education and Public Outreach . ...

... To be read in conjunction with Section 4.11 of the WFPC2 Instrument Handbook , -Version 4.0. ... 1 The second study found evidence that CTE loss for faint stars has increased with time (Whitmore, 1998). The primary observational consequence of CTE loss is that a point source at the top of the chip appears to be fainter than if observed at the bottom of the chip, due to the loss of electrons as the star is read out down the chip (see Figure 1 ). ... Last updated: 06/16/98 10:38:00 . ...

... Wisps of dust fill the space between the stars. ... Sometimes this dust is thick and prominent as dark patches on otherwise bright emission nebulae. Other times this dust may show itself by reflecting the light of bright, nearby stars. ... Dark spots that might appear on the image are usually sunspots, dark magnetic depressions that are slightly cooler than the rest of the Sun's surface. ... Hyakutake: Comet Atmosphere . ... The atmosphere of a comet comes and goes. ... Return To Cydonia . ...

... SciSim release covered by this note . ... Data-Analysis-with-SAS in a simple and standardised way, and should allow calibration experts to re-assess the reliability of the different elements of XMM-Newton simulations. ... Also, a release of all calibration files to be used in the reduction, through the SAS, of SciSim generated data, is coordinated with this release. ... Furthermore, two SAS tasks (odffix and epicproc) had to be updated to make possible a proper SAS data reduction of simulated data. ...

Figure 4a. The defocus in arcseconds of blur on the image plane is shown as a function of time for the night of August 14. Arrows mark the times at which the telescope focus was manually changed. The labels show the magnitude of the changes made. The squares show measurements of the defocus just prior to and after manual focus changes. ... Below I will show clear indications of errors in the secondary motions which are probably contributing significantly to focus errrors in the telescope. ...

... ONLY include the controls you are actually using. ... only used if > -100 !Profile_xmax = 1.2 !-101 ! ... only used if > -100 Profile_other_ymax = -101 ! ... step number. negative means use default. ... negative means use same value as for window CONV_file_aspect_ratio = -1 ! negative means use same value as for window ! ... negative means use same value as for window Surf_Hist_file_aspect_ratio = -1 ! ... negative means use same value as for window Power_file_aspect_ratio = -1 ! ...

The Face on Mars . ... The Raw Images . Table 1: List of Viking Orbiter Images of the "Face on Mars" . ... Processing the Face Images . Table 2: Dimensions of Mercator Projected Images of "The Face on Mars" . Map Projected Images . ... Processing the "Face on Mars" Images . ... This page will provide interested persons with both the raw Viking images, transformed to GIF format, and a brief tutorial (with examples) of image processing techniques applied to create "better looking" images. ...

... The Raw Images . Table 1: List of Viking Orbiter Images of the "Face on Mars" . ... Processing the Face Images . ... In July, 1976, Viking Orbiter 1 was acquiring images of the Cydonia region of Mars as part of the search for potential landing sites for Viking Lander 2. ... Using the height field, it is also possible to view the "Face" from different look directions, by mapping the Viking Orbiter image directly on the the topography and then placing the "viewer" at different locations. ... Mars . ...

... Show Times . ... Armagh Planetarium has a range of shows suitable for all the family. ... Due to the darkness and sound levels some shows are only suitable for children of six years and above. ... Please check the show descriptions (see below) for age ranges. ... AGE restrictions apply: NO ENTRY FOR CHILDREN UNDER SIX YEARS OLD . ... Live presenter-led show : Duration 25 mins . ... Specially produced by Armagh Planetarium, 'The Little Yellow Star' is a new show aimed at pre-school aged children. ...

... It turns out one possibility is a form of matter/energy invented by Einstein in the 1920s to make sure his equations of General Relativity did not predict the Expansion of the Universe. Although Einstein was willing to predict several things with his equations of General Relativity, he obviously thought an expanding Universe was too much, and so he invented the Cosmological Constant, which repels itself, and was meant to balance the force of gravity, and make the Universe static. ...

... Previous: Literature and Catalogs in Electronic Form: Questions, Ideas and an Example: the IBVS . ... Astronomers can use the ADS to maintain their publication lists; a simple http link can bring a current bibliography at any time. ... For example the following links to Martha Hazen's bibliography. http://adsabs.harvard.edu/cgi-bin/abs_connect?author=hazen,m. &aut_syn=YES&nr_to_return=all . ... To have a complete bibliography via ADS one needs but to add the missing articles into ADS. ...