... November 23, 1997 . Triton: Neptune's Largest Moon . Credit: Voyager 2, NASA . Explanation: On October 10th, 1846, William Lassell was observing the newly discovered planet Neptune . ... The above picture of Triton was taken in 1989 by the only spacecraft ever to pass Triton : Voyager 2. ... Ironically, Voyager 2 also confirmed the existence of complete thin rings around Neptune - but these would have been quite invisible to Lassell! ... About APOD > . ...

... Bojan Nikolic web pages (r. 329) . Out-Of-Focus (OOF) Holography . The observed beam maps are shown in the first row of the table below. ... The analysis was done in the usual way. ... A sample OOF observed data set (top row) and the results of analysis with increasing number of Zernike polynomials used to parameterise the aperture: . Observed beams . Example of an OOF analysis for the GBT . Observed data and analysis . ... Copyright 2005 -- 2016, Bojan Nikolic feedback welcome ...

Next: Standard On Up: Spectral-Line Observing at AO Previous: RECEIVER CHOICE . The readily available observing procedures, and those we strongly encourage observers to use, are the procedures available with the observing gui. ... Second - you MUST be aware that since you are observing using a non-standard procedure, the software may not exist to aid you in your data reduction, and the overworked computer department at Arecibo is under no obligation to write software for you. ... Standard On . ...

... The dates for the 3 rd Asian-Pacific Astronomy Olympiad are November 21-29. ... See personal data of the previous APAO as an example. ... Teams may stay in Xiamen since two days before before November 21 and two days later November 29, i.e. it is possible to arrive since November 19 and depart not later December 1. ... Monday November 19 Possible delegations arrive . Tuesday November 20 Possible delegations arrive . ... Friday November 30 Possible delegations depart . ...

... Up: Software Systems and Tools . ... This case study examines the use of the latest software techniques for merging independent Java applets and applications. STScI's new Java interface to the archive, StarView II, will make use of the ST-ECF stand-alone FITS image viewer JIPA. We discuss how state-of-the-art software techniques like Remote Method Invocation (RMI), multithreading, and the Reflection API influence the design of a common interface between StarView II and JIPA. ...

... Predicting the 1999 Leonid Storm : David Asher also explained previous Leonid meteor storms (notably the great storms of 1833 and 1966), and together with Rob McNaught (Australian National University, Siding Spring Observatory) made accurate predictions for the times of the `normal' storm trails of the Leonids. The prediction for the 1999 storm (for November 18 02 08 ) turned out to be `spot-on', and made headlines around the world. ...

... 611Steppe+ This paper presents a catalog of 118 extragalactic radio sources observed at 90, 150 and 230 GHz from November 1990 to the end of 1992. ... J/A+AS/102/611 Millimeter continuum of extragal. sources III. ... 90 GHz (3.3 mm) flux density 43- 48 F6.4 Jy e_S90 []? total error at 90 GHz (2) 49 A1 --- n_S90 [ *abcd] See note (1) 52- 53 I2 --- o_S150 []? ... 150 GHz (2 mm) flux density 64- 69 F6.4 Jy e_S150 []? total error at 150 GHz (2) 70 A1 --- n_S150 [ *e] See note (1) 73- 74 I2 --- o_S230 []...

... SUN MOON MERCURY VENUS MARS, JUPITER SATURN . ... Mars . ... Previously understood that magnetic fields were directly related to rotation, so when I read that Mars, like Venus, didn't have one, my understanding crumbled. What exactly causes magnetic fields in planets? ... RELATED TOPICS: MAGNETIC FIELD . Planetary magnetic fields are definitely related to rotation, but directly not so much. ... Get instant access to subscriber content on Astronomy.com! ...

... ESO, the European Southern Observatory . ... Travel and Contacts . ... Green ESO . ... Survey Telescopes . ... 2002 . ... Images of Titan taken on November 26, 2002 through nine different filters to probe different altitudes, ranging from the stratosphere to the surface. ... Due to these good observing conditions, Titan's trailing hemisphere was observed with contrasts of about 40%, allowing the detection of several bright features on this surface region, once thought to be quite dark and...

... Leonid Meteors Streak . ... The 2004 Leonids meteor shower had its ups and downs. ... Spiral Galaxies in Collision . ... Billions of years from now, only one of these two galaxies will remain. ... Stereo Phobos . ... Get out your red/blue glasses and float next to Phobos, grooved moon of Mars! ... The 1999 Leonids Meteor Shower came to an impressive crescendo. Observers in Europe observed a sharp peak in the number of meteors visible around 0210 UTC during the early morning hours of November 18. ...

... Home Articles Observing Resources for Amateur Astronomers ? Part 1: Beginning Observers Observing Resources for Amateur Astronomers ? Part 3: Advanced Observers . ... Observing Resources for Amateur Astronomers - Part 1: Beginning Observers . Observing Resources for Amateur Astronomers - Part 2: Intermediate Observers . Observing Resources for Amateur Astronomers - Part 3: Advanced Observers . Observing Resources for Amateur Astronomers - Part 4: Magazines and Miscellany . ...

... Currently, there is very little information on comets which are active beyond the orbit of Jupiter. ... Previous observations conducted by our team with the SAO RAS 6-m telescope showed that some of these comets have extended tails dissimilar to the tails of comets forming at close heliocentric distances. ... We for the first time measured the linear polarization of scattered emission for the two distant comets C/2010 S1 (LINEAR) and C/2010 R1 (LINEAR) at heliocentric distances of 5.9-7.0 au. ...

... Actual stars are expected to be more complicated than these simulations. ... The spot may be entirely visible most of the time (one would observe a prolonged flux minimum low), and then part of it may disappear over the horizon briefly and then return (slow rise and then fall back to constant level). ... With the set of observations taken here, I have information available from several comparison stars and color information. ... The period found must be consistent with the data from any given night....

. Main page . Photos . Amsterdam . Amsterdam . Amsterdam . Amsterdam . Amsterdam . Amsterdam . Amsterdam . Amsterdam . Amsterdam . Amsterdam . Amsterdam . Amsterdam . The red lights district . The red lights district . The red lights district . The red lights district . Leiden . Leiden . Leiden . Leiden . Leiden . Leiden . Leiden . Leiden . Leiden . Previous page . 1 2 3 4 5 . Next page . Not paginated version of this web-page . Копосов Сергей , 2003-2007 . Koposov Sergey , 2007

... Fitting the observed dependence includes calculations of the polarization cross-sections averaged over particles orientation and size distribution, their normalization and the comparison of obtained dependencies with Serkowski's curve representing observational data for a chosen star. ... Variations of the polarization factors with wavelength are shown in Fig. 16 for homogeneous spheroidal particles with PF orientation. ... The distinction between prolate and oblate spheroids is also clearly seen. ...

Next: Radial velocity of the Up: Optical spectrum of IRAS04296 Previous: Observations and spectra reduction . ... However, molecular emission features are only very rarely observed in the optical spectra of PPNe. ... On the other hand, it is well known that cometary nuclei spectra show prominent Swan band emission. In both spectra of IRAS04296 we have discovered strong emission in the (0;0) and (0;1) bands of the Swan system of the molecule. ... Now consider the case of IRAS04296. ...

... BIRTHDATE/PLACE: . ... EDUCATION: . ... B.S., Geology, University of California-Santa Barbara, 1990 . M.S., Geology, University of Arizona, 1992 . ... Full Biographical Data . ... M.S., Ocean Engineering, Massachusetts Institute of Technology, 2000 . ... B.S., Electrical Engineering, University of the Pacific, 1984 . ... JAXA Astronaut . ... M.S., Aerospace Engineering, University of Houston Cullen College of Engineering, 1997 . ... Astronaut Candidates | ... Biography Page Curator: Kim Dismukes . ...

... Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. November 8, 1996 . A Solar Corona Ejection . ... One reason, besides the extreme heat, is that explosions are common there . In the above picture, magnetic fields buckle releasing previously constrained hot material from the upper atmosphere of the Sun . ... CMEs are more common but less intense than solar flares . ... About APOD | ...