... Solar Storm Causes X-Ray Aurora . ... 18.04.1997 . ... Credit: POLAR , PIXIE , NASA Explanation: On April 7 , the SOHO spacecraft spotted a Solar Storm ejecting a cloud of energetic particles toward planet Earth. ... In this image from April 11 , the Polar Ionospheric X-ray Imaging Experiment (PIXIE) onboard NASA's orbiting POLAR spacecraft records the strongest X-ray aurora seen in more than a year of operation. ... April . ... April 1997 . ... Publications with keywords: storm - X-ray . ...

... April 18, 1997 . Solar Storm Causes X-Ray Aurora . Credit: POLAR , PIXIE , NASA . Explanation : On April 7 , the SOHO spacecraft spotted a Solar Storm ejecting a cloud of energetic particles toward planet Earth. ... In this image from April 11 , the Polar Ionospheric X-ray Imaging Experiment (PIXIE) onboard NASA's orbiting POLAR spacecraft records the strongest X-ray aurora seen in more than a year of operation. ... About APOD > . ... NASA Technical Rep.: ...

... Bad Astronomy . Misconceptions . ... He wrote an article for the "Science and Technology Review" in which he claims that there is a "clear correlation" between transits of Venus and the flooding of the Yellow River! ... The news reports say he looked in historical records dating back 2187 years (the Chinese are known for keeping records a long time!), and found that the Yellow River flooded at the same time as the Venus transits. ... What could Venus do to cause such a flood? ... 2008 Phil Plait. ...

... Project page . ... Project workpage . Turbulence in the Multiphase Interstellar Medium . Project I | ... Project highlight | ... Towards simulating turbulence with adaptive meshes . ... A. Kritsuk, P. Padoan, M. Norman . ... A. Kritsuk M. Norman . ... A. Kritsuk, M. Norman, P. Padoan . astro-ph/0411626 | ... P. Padoan, A. Kritsuk, M. Norman, A. Nordlund . ... Introducing Enzo, an AMR Cosmology Application . B. O'Shea, G. Bryan, J. Bordner, M. Norman, T. Abel, R. Harkness, A. Kritsuk . ...

... Special Reports Giant space cloud may be powered by black holes 17:57 23 April 2007 NewScientist.com news service David Shiga An enormous cloud of roiling plasma in space may be drawing its energy from black holes, new observations suggest. Such clouds might be sources for the mysterious particles that occasionally crash into Earth's atmosphere at ultra - high speed. ... But higher energy particles in the cloud may be able to escape, he says. ...

... Low-latitude aurorae are a storm time phenomena, in which particles originating from the ring current (and/or which are energized by the ring current) enter the lower thermosphere causing optical emission. It has been suggested (Rassoul et al., 1993) that four "pure" types of such auroras exist, as shown in table below, where LEE = low energy electron aurora, and HP = heavy particle aurora. ... low-latitude . ... One should thus not confuse them with other red emissions from much lower altitudes. ...

What will happen when the fragments hit Jupiter? ... All the fragments will enter Jupiter's atmosphere at an angle of 42 degrees from the vertical and impact near a latitude of 44 degrees south, but on the back side of the planet as seen from Earth (about 10 degrees in longitude behind the edge of Jupiter, as seen from Earth). ... Any body moving through an atmosphere is slowed by atmospheric drag, by having to push the molecules of that atmosphere out of the way. ...

... Posts tagged ?particle filter? ... Astronomers have developed their ways of processing signals almost independent to but sometimes collaboratively with engineers, although the fundamental of signal processing is same: extracting information. ... This particular issue of IEEE signal processing magazine may shed lights for astronomers interested in signal processing and statistics outside the astronomical society. IEEE Signal Processing Magazine Jul. ... ArXiv] 3rd week, Dec. ... Entries RSS . ...

... Aurora from Space . ... Magnetic Storms . ... Solar fast Particles . ... Currently more than 200 communication satellites circle the Earth in synchronous orbit . ... Another effect of magnetic storms (and to lesser extent, of substorms) is a greater intensity of the electric currents circulating between Earth and distant space. ... One spacecraft would orbit near Earth, the other would be stationed elsewhere in the Earth's orbit around the Sun, capturing a sideways view of solar eruptions. ...

... SUN MOON MERCURY VENUS MARS, JUPITER SATURN . ... Mars . ... Spacecraft detects aurora and mysterious dust cloud around Mars . Although the source and composition of the dust are unknown, there is no hazard to MAVEN and other spacecraft orbiting Mars. ... MARS | ... NASA s Mars Atmosphere and Volatile Evolution (MAVEN) spacecraft has observed two unexpected phenomena in the martian atmosphere: an unexplained high-altitude dust cloud and aurora that reaches deep into the martian atmosphere. ...

... The TRACE images may be used without restrictions in publications of any kind. ... These two images, taken on 18 November 2000 at 15:54UT and 16:11UT, respectively, show such an event: the red circle in the image to the left shows a region where many loops are cooling, with bright loop tops (the intensity scales with the square root of the image to reduce the dynamic range). ... See also a collection of images related to the Sun, other cool stars, and solar-terrestrial effects . ... Images | ...

... The following times are BST: Start oif Penumbral Phase (P1) Barely noticeable): 02h 05m 25s Start of Umbral Phase (U1): 03h 02m 51s Start of Total Phase: (U2) 04h 13m 49s Mid Eclipse: 04h 40m 10s End of Total Phase: (U3) 05h 06m 31s End of Umbral Phase (U4): 06h 17m 29s Duration of Totality is just 52 mt 42s, and the sky will be brightening with dawn twilight towards the end of totality, especially for observers in the North-east. ... 7° 00'; 225° End Totality 1° 48'; 232°. ... Terry Moseley . ...

... Science User Portal . ... ESO, the European Southern Observatory . ... Travel and Contacts . Travel to ESO Headquarters . ... Survey Telescopes . ... Star Clusters . ... Stars@ESO . ... ESO Science Newsletter . ... As we close in on part of the small constellation of Corona Australis we start to see faint clouds and in the final part of the video the full glory of the dramatic star formation region NGC 6729 is revealed in a new image from the FORS1 instrument on ESOтАЩs Very Large Telescope. ...

Blackholes Forum Message . ... Post . ... Higgs Particles ?? ... Post Message | ... Posted by Lukas on February 18, 2005 01:05:17 UTC . As I know , mass can also be caused be angular momentum.Photons do have mass because they have it.So , they should distort fabric of Spacetime and cause gravity,as I undertsand ralativity. ... www.astronomy.net . ... Forum posts are Copyright their authors as specified in the heading above the post. "dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET" . ...

... Looking down on a storm (image credit: Robert Johnston) . Spearheaded by the Project Lead Robert Johnston of Cookstown High school, along with the support of Gerard McStocker from Holy Trinity College and the тАШhighlyтАЩ experienced High Altitude Balloonist Philip Heron , this leading edge school project has left us gazing into the sky! ... The Sun from the stratosphere just north east of Dublin (Image credit: Robert Johnston) . ... The limb of the Earth (Image credit: Robert Johnston) . ...

... High-velocity clouds (HVCs) were discovered by Muller, Oort & Raimond (1963) in the 21-cm line emission of neutral, atomic hydrogen. They are gas clouds which are characterised by high radial velocities incompatible with a participation in the rotation of our Galaxy. ... This suggestion was seized by Braun & Burton (1999) who identified 66 compact high-velocity clouds (CHVCs) with positional and kinematic characteristics being compatible with a distribution across the entire Local Group. ...

... Resolving the Sun's Hot Corona: High Resolution Solar Imaging in the Extreme Ultraviolet . Dr. Kelly E. Korreck . Thursday, Dec 11, 2014 at 8:00 PM . ... As SAO Project Scientist for the NASA rocket High Resolution Coronal Imager (Hi-C), she managed the funding, technical staff, and construction of the telescope leading to the highest resolution images ever of the Sun's hot atmosphere. ... Dec . ... 2017 Total Solar Eclipse . Copyright (c) Amateur Telescope Makers of Boston, Inc. ...

... 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. ...

After some period of quiet Sun the exciting Sun-Earth connections event as the big magnetic storm was observed at January 10-11, 1997 by various satellites and ground-based instruments. Scientist meet this challenge with unprecedented activity and a few data bases was created in relation with solar event/magnetic storm on a few WEB-sites. ... According the Moscow observatory data the sudden storm commencement (SSC) take place at 01:08 Universal Time of January 10, 1997. ...

... Operating at a wavelength of 10 ?m, it produces a 135њx135њ image with a resolution of 0.9њ. ... The clouds move from the west-southwest. ... At the same time as the IR images, visible light images were taken with an Apple Computer QuickTake electronic camera. ... At 1540 MDT, the large central cloud is visible in both images. At 1544 MDT, a distinctive cloud is apparent near the center in the visible image and right of center in the IR. The performance of the SDSS cloud scanner is excellent. ...