... Auroral Currents . ... Polar Caps . ... Aurora from Space . ... Magnetic Storms . ... Plasma phenomena occuring at one place in the magnetosphere also affect other locations This linkage is most pronounced between points that share the same field line, since field lines guide the motion of ions and electrons. ... Early researchers, who believed auroral electrons came from the Sun (see history ) could not understand why the aurora was absent from the vicinity of the magnetic pole itself. ...

... Auroral Currents . ... Polar Caps . ... Aurora from Space . ... Magnetic Storms . ... Plasma phenomena occuring at one place in the magnetosphere also affect other locations This linkage is most pronounced between points that share the same field line, since field lines guide the motion of ions and electrons. ... Early researchers, who believed auroral electrons came from the Sun (see history ) could not understand why the aurora was absent from the vicinity of the magnetic pole itself. ...

... Two Comets in Southern Skies . ... Credit: Gordon Garradd Explanation: Wielding a very wide-angle lens, astronomer Gordon Garradd was able to capture two naked-eye comets in one picture looking toward the west from Loomberah, New South Wales, Australia. At the far left lies comet C/2002 T7 (LINEAR) and at the far right, comet C/2001 Q4 (NEAT) . ... While comet T7 (LINEAR) is the brighter of the two comets, both are now fading. ... Publications with keywords: comet . ... Comet Holmes Over Hungary . ...

I was wondering what conditions should be met to have the "darkest" sky .. ... Upon the above publication of the Southern Galactic hemisphere, TunГ Tezel started seeking opportunities to create the Northern counterpart image. ... So, the initial quest of having the darkest possible sky have delivered us these two all-sky images of the two galactic hemispheres as seen from Planet Earth. Zoomable and 'full-screenable' fisheye view of the "darkest sky" Southern Galactic Hemisphere image. ...

... Magnetic fragment behaviour Note A bipolar region was involved. ... Negative fragments form the arrowhead and positive ones distribute in the south-north direction. ... The middle part of the positive fragments moves towards the western part of the negative fragments. A few negative fragments in the west move towards the southern part of the positive fragments. ... Meanwhile, the western part of the negative fragments moves towards the southern part of the positive fragments. ...

... Welcome reception: 18:00-21:00 Session 1: Chair - George Hobbs . ... Probes of magnetic fields --------- . ... 10:00 JinLin Han "Rotation measures of pulsars and radio sources for Galactic magnetic fields" . ... 11:30 Benjamin Whelan "Probing Galactic and intergalactic magnetic fields using ultra high energy cosmic rays" . ... 13:30 Shea Brown "Cross-correlation of ATLAS and Spitzer-SWIRE Surveys: Probing intergalactic magnetic fields" . ... 09:30 Andrew Melatos "Magnetic fields of compact objects" ...

... connection points . ... The point P3 is the connection between the horizontal and vertical actuators and is the axis of rotation for the tail gunner motion. processing: survey/020204/reduc We can compute P3,P5 (the moveable points) in dome centerline coordinates if we have the actuator distances and we know the positions of the above connection points in dome centerline coordinates for a given position of the tertiary (say the nominal focus position).(see actuator distances to dome centerline ). ...

... 2010 May 6 . Northern and Southern Owls . ... Explanation: Captured in colorful telescopic portraits , two cosmic owls glare back toward planet Earth in this intriguing comparison of planetary nebulae . On the left is M97 in the constellation Ursa Major, also known in the northern hemisphere as the Owl Nebula. On the right is its visual counterpart, the southern Owl Nebula in the constellation Hydra, cataloged as PLN 283+25.1. ... About APOD | ... A service of: ASD at NASA / GSFC . ...

... The Russian TESIS/ CORONAS-PHOTON Solar Observatory, which has been working in orbit since January 30th, 2009, has photographed one of the most important events in the build up to the upcoming solar cycle - the formation of our star's new southern belt of activity. The first magnetic fields of the new cycle in the southern hemisphere appeared on the Sun's surface on May 23-24th. ... The belt of activity is one of the primary concepts, characterizing the solar cycle. ...

... This page provides some context for the Heritage release of the HST/ACS 14th anniversary images of what John A. Graham first positively identified as "a peculiar southern ring galaxy". The image data displayed below show the environment around the RN nuclear ring galaxy VV785 (a.k.a. AM0644-741, the Lindsay-Shapley Ring, or Graham's Ring Galaxy) in ground-based radio, IR, and optical wavelengths. ... Above are the SHASSA Continuum (left) and H-alpha images of the field around the ring galaxy. ...

... In a solar prominence, charged particles stream up from the Sun, spiraling around magnetic field structures poking out of the solar surface, and ultimately fall back along those structures into the Sun. ... As evolution would predict, animals' eyes sense the colors of light emitted most strongly by the Sun. ... The tiny Moon can completely cover the disk of the Sun, blocking most of the emitted visible light, and reveal the Sun's faint outer atmosphere called the corona...a mass of incandescent gas ...

... Moon . ... Comets and Asteroids . Meteors and Meteorites . ... WeтАЩve become rather obsessed with meteor showers in recent months, and for good reason. ... The first meteor shower peaks around 11- 12 November too, so keep an eye out. ... On 11 November there will be a New Moon, so the night sky will not be flooded with moon light. ... Normally this is a relatively weak meteor shower with the meteors hitting the EarthтАЩs atmosphere at 65 km/s. Finally we will see a Full Moon on 25 November. ...

... More on 51 Peg: . The discovery of a Jupiter--mass planet in orbit around the solar--type star 51Peg has been reported by Michel Mayor and Didier Queloz (Geneva Observatory) on October 6th at the 9th Cambridge workshop on "cool stars, stellar systems, and the sun" held at Florence (Italy). ... Recall that the measurements of radial velocity only yield v sin i which in turn gives us M sin i. For most values of i, sin i will be greater than 0.5 and this gives a mass estimate of 0.5 Jupiter masses. ...

... GCN 8471 | ... TITLE: GCN CIRCULAR NUMBER: 8516 SUBJECT: GRB 081102: MASTER refind and final results DATE: 08/11/11 15:50:10 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs E. Gorbovskoy, V. Lipunov, V.Kornilov, A.Belinski, N.Shatskiy, N.Tyurina, D.Kuvshinov, P.Balanutsa Sternberg Astronomical Institute, Moscow State University A. Tlatov, A.Parkhomenko Kislovodsk Solar Station of the Pulkovo Observatory V.Krushinski, I.Zalognikh Ural State GCN Circ 8470, Lipunov et al., ...

How to reach Het Pand from the hotel: . The conference centre is within walking distance from the hotel (~10min). Follow the Vlaanderenstraat in NW direction and continue along the Limburgstraat and the Emile Braunplein until you reach the Korenmarkt. Cross the river via the bridge, turn around the Sint-Michiels church. Het Pand is next to the church. ... HOTEL FLANDRIA . ... How to reach the hotel from the train station Gent-Sint-Pieters: . ... HOTEL CASTEL . ...

Check out the new images (Jan 18-25) and (Jan 26-Feb 05) of the comet by Rob McNaught. ... Every few years a comet becomes bright enough to be easily seen with the naked eye but only every decade or so are these comparable with comets like Halley. ... Before Jan 13, the comet is not visible in the Australian sky after sunset. ... SOHO images . ... On Jan 12 at approximately 09:00 UT (8pm NSW time), comet C/2006 P1 McNaught appears at the 11 o'clock position in the images. ... STEREO images . ...

Coordinate Systems used for spacecraft trajectory description: . ... The HGI coordinates are Sun centered and inertially fixed with respect to an X-axis directed along the intersection line of the ecliptic and solar equatorial planes. ... Cometocentric (solar) Ecliptic Coordinate System (CSE) . ... CSE coordinate system for the SC POSITION: axis origin at comet center, X-axis to the SUN, Z-axis to ecliptic north pole, (X,Y)-plane is parallel to the ecliptic plane. ...

... As is known, the observed distribution of massive stars in the direction of the Galactic center looks very peculiar: the vast majority of all massive stars are concentrated towards the central 1 pc or so (Genzel et al. ... In order to compare the observed distribution of X-ray sources in the Galactic center with what would be expected from the population synthesis computations, we have considered two hypothetical scenarios for the location of the starburst. ...

... Bad Astronomy . ... Mad Science . ... Keep Bad Astronomy close to your heart, and help make me filthy rich. ... City: Methuen State/Province: MA . ... Area of science: Earth Sciences . ... Does water swirl in limited gravity situations such as a space station? ... If you dropped a rock from the station axis (which would no doubt get you a free ticket back to Earth from an angry commander!) it would appear to arc strongly in the anti-spin direction as it fell, and the station rotated underneath it. ...

... Keywords: Proper Motions, Schmidt Plates, Astrometry, Guide Star Catalog, Palomar Sky Survey . In this paper we describe a program of determining proper motions from digitized scans of 1950's-era Palomar Sky Survey (POSS) Schmidt Plates and 1980's-era Palomar Oschin Schmidt `Quick V' plates that were taken for the Hubble Space Telescope ( HST ) Guide Star Catalogue. ... Arrows indicate the magnitude and direction of the proper motion for the stars. ...