... 27.07.2011 . ... Comet Garradd was discovered two years ago by Gordon Garradd in Australia , and is currently visible through a small telescope at visual magnitude nine. Officially designated C/2009 P1 (Garradd), the comet will likely continue to brighten, with recent projections placing it at peak magnitude six or seven in February 2012, just below naked eye visibility. ... July 2011 . ... Publications with keywords: comet - Solar System . Publications with words: comet - Solar System . ...

... 2013 December 2 . Comet Lovejoy Before Galaxy M63 . ... Explanation: Comet Lovejoy was captured last week passing well in front of spiral galaxy M63. Discovered only three months ago and currently near its maximum brightness, Comet Lovejoy can be seen near the Big Dipper from dark northerly locations before dawn with the unaided eye. An unexpected rival to Comet ISON , C/2013 R1 ( Lovejoy ), pictured above, is currently sporting a large green coma and a beautifully textured ion tail . ...

Подписка на рассылку обзоров astro-ph на Subscribe.Ru . ... Предыдущий выпуск (N335) . ... Обсудить на форуме Scientific.RU . ... Подписка на рассылку обзоров на Subscribe.Ru . Обзоры препринтов astro-ph . ... Собственно обзоры препринтов. ... Ранее обзоры также были на Астронете и на Scientific.Ru . ... АНКи доступны на Астронете , а с 2006 по 2008 г. также на сайте Элементы.Ру . ... Ранее они также размещались на сайте Астронет и в архиве моих обозрений (кодировка KOI8) на сайте Scientific.Ru . ...

... As of October 1, 2009, the global rate for the STIS NUV-MAMA dark current has still been occasionally reaching values as high as 13500 counts/s. This high dark current will force use of a signficantly smaller buffer time than would be otherwise needed, and in many cases may push the count rate high enough to make time-tag observations impractical. ... However, we instead found for the NUV MAMA detector an initial global dark rate of between 9000 and 18000 counts/s (a mean of 0.013 counts/s/pixel). ...

... Armagh Observatory, College Hill, Armagh BT61 9DG, +44 (0)28 3752 2928 . This year's annual Geminid meteor shower is active during the period December 7 - 17, with the peak of activity occurring during the night of December 13th/14th. The Geminid shower is currently one of the best of the major annual meteor displays, usually having a high number of relatively bright, medium-speed (130,000 km per hour) shooting stars. ... Last Revised: 2009 December 7th . ...

... ATNF Home . About ATNF . ... About ATNF overview . ... Australia Telescope Steering Committee . ... Astrophysics graduate student programs . ... Work experience for school students . ... Australian Square Kilometre Array Pathfinder . Murchison Radio-astronomy Observatory . ... Parkes radio telescope . Australia Telescope Compact Array . ... Current telescope status . ... Visiting Parkes radio telescope . Visiting Australia Telescope Compact Array . ... Parkes radio telescope webcam . ...

The "ring of fire" seen by satellite cameras around the polar caps (picture below) is probably created by electrons leaking from the tail's plasma sheet, whose magnetic field lines form a somewhat imperfect trap. ... One possible explanation involves the close association between auroral arcs and electric currents which flow along field lines between the ionosphere and distant space ( Birkeland currents ). ... That produces an extra resistance to the flow of current. ...

... Auroral Currents . ... 25b. Io Dynamo . ... Aurora from Space . ... The giant planet Jupiter has four large moons, discovered by Galileo and visible through good binoculars. ... A dynamo is created in a magnetic field by an electric circuit, part of which is moving relative to the rest (additional conditions must also be met). ... Furthermore, the plasma between them conducts electricity very well along its magnetic field lines, which act as if they were wires connecting Io and the planet (drawing)....

... The star formation rate (SFR) of the current SF episode can be estimated from the total H luminosity. ... For the derived total flux F (H )=5.8 erg s -1 cm -2 we obtain a total H luminosity of 10 39 erg s -1 . ... The total mass of ionized gas can be obtained from the average mass density inside the H II region and its volume. An average mass density corresponding to the average electron density of 1 cm -3 within a volume with a diameter of 0.5 kpc yields a total ionized gas mass of 10 6 . ...

. The following is a list of the currently installed versions of the CIMA. The links refer to the CIMA version log page . Normal: version 3.0 - this is the next version of CIMA which has become the new default version --- NOTE that this version uses a new syntax for command file observations, uses new configuration files and needs source files with full velocity information . Old: version 2.2 - this is the old version of CIMA You can return to the main CIMA page by clicking here .

... In 1930, Trumpler noticed that linear diameters (LD) of open clusters increase with distance (D) from the Sun. ... Since that time, the interstellar absorption has become one of the best studied factor in astrophysics, and we may hope that current OCL distance scales are free from this LD-D correlation. To verify if this is the case we have chosen several modern OCL distance scales and test them with the same clusters and the same angular diameters that Trumpler had used back in 1930. ...

Novermber 2008 - WORK IN PROGRESS We are currently using the (just announced end-of-life) Netrestore software to install our systems. ... We automount our NFS-based home directories. ... On the Mac end, edit /etc/autofs.conf, and add ",resvport" to the AUTOMOUNTD_MNTOPTS. ... This is more of a problem, because Finder is a busybody, sticking it's nose in business it shouldn't. Simply symlinking to an autmounted directory failed abysmally. ... Here's our current list of files we change, and why: . ...

... 23 September 2004 - Telescope First Light! ... 30 July 2004 . ... NIC-FPS is an instrument combining the capabilities of a near-infrared imaging camera with a cryogenic Fabry-Perot etalon currently under development at the Center for Space Astrophysics and Space Astronomy , University of Colorado with support from Rice University , Ball Aerospace and the Astrophysical Research Consortium. It is scheduled to begin operations on the ARC 3.5m telescope at Apache Point Observatory in 2004. ...

... The ESO ADS mirror site is currently unavailable. ... Please use one of the ADS sites listed below. Harvard-Smithsonian Center for Astrophysics, Cambridge, USA . ... European Southern Observatory, Garching, Germany . National Astronomical Observatory, Tokyo, Japan . ... Beijing Astronomical Observatory, Beijing, China . Inter-University Centre for Astronomy and Astrophysics, Pune, India . ... Korea Astronomy Observatory . Send comments to <webmaster@eso.org> . ...

. When you log on to the system you are always placed in your home directory . At first this is your current directory. If you then change to another directory this becomes your current directory. The command pwd displays the full pathname to your current directory.

XMM­Newton CCF Release Note XMM­CCF­REL­242 Modifications to EMOS Bad Pixel Table M.J.S. Smith April 1, 2008 1 CCF Components Name of CCF VALDATE EVALDATE Blocks Changed CAL Version XSCS Flag EMOS1 BADPIX 0033 2008­03­17T08:07:11 -- BADPIX NO EMOS2 BADPIX 0025 2008­03­17T08:07:11 -- BADPIX NO 2 Changes These CCFs reflect the currently uploaded MOS Bright Pixel Table. Since the cooling of the MOS detectors in rev 533, there has been a slow but steady increase in the number of noisy pixels. ...

The rates of build-up in the atmosphere of human-made compounds that deplete the ozone layer (e.g., chlorofluorocarbons (CFCs) and halons) have slowed in recent years as a direct result of reductions in global emissions of these compounds. ... The peak global ozone depletions are expected to occur during the next several years. ... Methyl bromide continues to be viewed as a significant ozone- depleting chemical. ...

Bright Supernova - Archives On these pages you will find references to Supernovae which have faded into oblivion. ... Finally, in 1999, when I took over the International Supernova Network's Latest Supernovae page I retitled the main page "Latest Supernovae", BUT, it's the "Latest Supernovae" page of the "Bright Supernovae" pages which are also sub-pages of ISN. ... Brightest supernova in 2005 . ... Brightest supernova in 2002 . ... Brightest supernova in 2000 . ... Brightest supernova in 1999 . ...

. Other Relevant Links . Number counts have been illustrated earlier in the talk. QSO Clustering and Large-Scale Structure , Scott Croom et al . QSO Evolution and the Luminosity Function , B.J. Boyle et al . | Front page | . | << - Contamination | QSO close pairs - >> | . Robert J. Smith, ">rsmith@mso.anu.edu.au Last modified: Fri Sep 24 11:39:02 EST 1999 .

... We considered our current level of technology compared to that of an average alien civilization. Regardless of any modest value of L chosen?500 years, 5000 years, or longer?their level of technology is vastly advanced compared to ours. Thus, most science fiction gets it right by having advanced alien technology, but gets it wrong by not making them sufficiently advanced. ... What would alien civilizations at a distance of 100 or 1000 lightyears know of us (hypothetically)? ... Education . ...