... Tonight's Sky . ... The Magazine . ... Observing . ... The double star 54 Leonis, spiral galaxy NGC 3198, and emission nebula NGC 3199 . ... Astronomy for Kids . ... Observing springtime deep-sky objects with a large telescope . ... Bright planets meet at dusk . ... Astronomy magazine subscribers can read the full article for free. ... Get instant access to subscriber content on Astronomy.com! ... Receive news, sky-event information, observing tips, and more from Astronomy's weekly email newsletter....

Next: Flagging Based on a Up: Other Flagging Tasks Previous: AIPS Flagging and Miriad- . Another handy task is qvack (derivative of the AIPS task quack and so named for obscure reasons) for flagging a number of correlations after the observing set-up has changed (i.e., the source changed, the pointing centre changed, or the frequency changed). ... Flag data for 30 s after change . ... This can be used if the observing setup has not changed, but you still wish to periodically flag some data. ...

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 | ...

XMM-Newton CCF Release Note XMM- CCF -REL-176 RGS QUANTUMEF Shortest-Wavelength Correction Factors A.M.T. Pollock July 27, 2004 1 CCF components Name of CCF VALDATE List of Blocks changed XSCS ag RGS1 QUANTUMEF 0013 1998-01-01T00:00:00 RGA EFFAREACORR NO SI1 SI2 SI3 SI4 SI7 RGS2 QUANTUMEF 0014 1998-01-01T00:00:00 RGA EFFAREACORR NO SI1 SI2 SI3 SI4 SI5 SI7 2 Changes Near the short-wavelength end of the RGS bandpass, the instrument ... The best- t power-law indices, , are shown. ...

... December Sunrise, Cape Sounion . ... The Sun is a moving target. ... How do planets form? ... If you went outside at exactly the same time every day and took a picture that included the Sun, how would the Sun appear to move? ... Aurora Shimmer, Meteor Flash . ... Dust particles strung out along the orbit of extinct comet Phaethon vaporize when they plow through planet Earth's atmosphere causing the impressive display. ... In 1996, an unexpectedly bright comet passed by planet Earth. ... December . ...

... I fixed the bugs that caused the map_point changes to fail tests. Then I removed the no longer needed dimensional variables from the p structure and got those changes to pass all the tests. ... I put the code under subversion control in a new branch called refactor. ... The code change which processes each drizzle kernel over an entire image rather than a line at a time now passes the unit tests and was checked in. ... I got the keywords argument changes done and got the tests to pass. ...

... 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 . ...

home publications > mercury . ... Astronomy Beat . ... Hitching a Ride on a Comet . Mercury, November/December 1996 Table of Contents . ... Late in the evening of Jan. 30, 1996 in Japan's Kyushu region, Yuji Hyakutake left his home in Kagoshima and drove to an observing site far from city lights. ... We bought our daughter a telescope to see the comet," she said, "and we can't see anything!" ... This helps us as we select the Guest Observer, and it helps readers to understand what you studied. ...

... 2005 December 9 . December Moon Meets Evening Star . ... Explanation: If you've been outdoors near sunset, then you've probably noticed Venus low in the west as the brilliant evening star . ... As this season's evening star, Venus will be at its most brilliant tonight, but as December progresses the bright planet will begin to fall out of the western sky. By early next week, December's Moon will have moved on to meet another bright planet overhead -- Mars . ... About APOD | ...

... Bad Astronomy . ... Bitesize Astronomy . ... Keep Bad Astronomy close to your heart, and help make me filthy rich. ... When Venus is on the far side of the Sun, we see the entire near side lit by the Sun. ... When it is on the near side of the Sun, it shows a beautiful thin crescent, because it is between us and the Sun and we see the mostly unlit dark half. ... To see this for yourself, draw a circle one centimeter across, then, next to it, draw a circle 6 centimeters across. ... 2008 Phil Plait. ...

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 | ...

... Any water on Mars is locked up in the ice caps. ... The most recent successful mission to Mars is the Mars Science Laboratory better known as the Curiosity rover. ... CuriosityтАЩs primary role is to search for conditi