... 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 . ...

... Sun images . ... Sun flares . ... Active areas . April : 2016 . ... The following regions with sunspots can be now observed on the Sun's surface . Group number . ... Group length (in degrees) . ... Coordinates and other characteristics of active regions are issued for April 09, 2016 00:31 UT The following H-alpha plages without spots can be currently observed on the Sun's surface . ... Coordinates and other characteristics of active regions are issued for April 09, 2016 00:31 UT . ...

... 2004 July 26 . A Large Active Region Crosses the Sun . ... Explanation: An unexpectedly large sunspot region is now crossing the Sun. The active region is home to rivers of hot plasma , explosive flares , strong magnetic fields , a powerful Coronal Mass Ejection (CME), and a sunspot group so large it can be seen by the protected eye without magnification. In fact, this region appears larger than Venus did when it crossed the Sun last month. ... About APOD | ...

... Sunspot Group AR 2339 Crosses the Sun . ... Large dark sunspot s -- and the active regions that contain them -- may last for weeks, but all during that time they are constantly changing. Such variations were particularly apparent a few weeks ago as the active region AR 2339 came around the limb of the Sun and was tracked for the next 12 days by NASA's Solar Dynamic Observatory . ... Publications with keywords: Sun - sunspot . Publications with words: Sun - sunspot . ... Across the Sun . ...

... 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 | ...

UPDATE FROM 03/08/2012: AT THE TIME OF ARRIVAL IN ENVIRONMENT DISTURBANCES OF LARGE SOLAR FLARE 05.03 0230 0409 0643 N17E52L299 X1.1/2B 3.7E-11 429 1 CME AND DEVELOPMENT MODERATE MAGNETIC STORM, IN COMPLEX ACTIVE REGIONS ON SUN AR11429 (N18L299, Sp = 1270 m.v.h. at 7.03) + AR11430 (N19L315, Sp = 200 m.v.h to 7.02) THE TWO LARGE SOLAR FLARES WAS OCCURRENCED 07.03 0000 0024 0349 N17E27L299 3B/X5.4 6.7E-11 429 1 II / 2, IV / 2, ... NEXT WEEK THE SUNSPOT ACTIVITY IS EXPECTED TO BE THE AVERAGE. ...

NATIONAL ASTRONOMY AND IONOSPHERE CENTER . ... Astronomy . ... During the last 48 hours, solar activity of moderate-to-large intensity was registered with two class X events (one was a maximum X5), and also events of class M and C. Two Coronal Mass Ejections (CME) occurred in March 4 and 5 reached the Earth this (Thursday) morning, March 8 at 11 UT (7 AST), and large variations in the Earth's magnetic field and energetic particle precipitation into the poles are expected. ... Arecibo Observatory €а . ...

An M8.7 (quite large) solar flare erupted from the Sun accompanied by a large coronal mass ejection (CME). The telltale brightening of the flare early Jan 23, 2011, was followed by a burst of particles into space, then superheated magnetic loops spun up in coils above the active region as the magnetic field began to reorganize itself. The eruption sent a stream of fast-moving, highly energetic protons toward Earth, igniting the most intense solar energetic particle storm since 2005. ...

Astronotes Armagh Planetarium's Stellar Blog! ... Solar System . ... Planets . ... This bizarrely shrunken planetary system was found by NASAтАЩs Kepler mission, hence the parent star has been named Kepler-11. ... Planetary scientist and Kepler science team member Jack Lissauer said ?These six planets are mixtures of rock and gases, possibly including water.тАЭ €аNone of these strange new worlds are likely to be home to any form of life; their surface conditions are simply too extreme. ...

Ganymede is the largest moon in our solar system, larger even than the planets Pluto and Mercury. ... Ganymede's surface consists of two main types of terrain: old, dark polygonal units, and young, bright valleys and ridges (see figure 11 ). ... In a similar way, hitting a large block of ice with a hammer makes white marks. ... Ganymede as seen by Voyager 2. ... Because Voyager couldn't spot any large impact craters, scientists have concluded that the moon's surface is young. ... Moon . ... Europa . ...

... Research objects and scientific purposes . Space scientific program includes development and launch of two supersmall spacecrafts "Universitetskiy" and "Kompas-2" intended for monitoring of radiation conditions near the Earth. ... All the studies conducted in the near-Earth space are characterised by strong radiation fields. ... The circular polar orbits, which cover all the near-Earth space, are the most favorable for comprehensive studies of the radiation conditions near the Earth. ...

... ESO is building what will be the World's largest optical telescope array, The Very Large Telescope (VLT). The VLT Project organisation is responsible for the design and construction of the Unit Telescopes, including enclosures, optics, adapter-rotators and coating unit. ... Unit Telescopes Overview - This page is outdated, an update is in process. ... Secondary mirror (M2 Unit) - This page is outdated, an update is in process. ... Coating Unit - This page is outdated, an update is in process. ...

New 12CO J = 4-3 and 13CO J = 3-2 observations of the N 159 region, an active site of massive star formation in the Large Magellanic Cloud, have been made with the NANTEN2 and ASTE submillimeter telescopes, respectively. ... The 13CO J = 3-2 data were newly taken for the present work. ... The N 159 E clump is associated with cluster(s) embedded, as observed at 24нјm by the Spitzer MIPS, and the derived high temperature, 80 K, is interpreted as being heated by these sources. ...

... Towards a Truly Unified Model of AGN . ... The Unified Model holds that the aspect-dependent effects primarily determine the nature of the active galactic nucleus that we observe. ... The full postscript file can be obtained here: . The PASA Latex file can be obtained here: . The postscript file of Fig 1 can be obtained here: . ...

... A typical density of energetic ions is 1 per cubic cm., and the ions are matched by electrons, generally of lower energy. ... This region is almost empty of plasma--typical density 0.01 ion/cubic cm., the "best vacuum" in the Earth's vicinity--but it contains a relatively strong magnetic field which, since it fills a large volume, can store appreciable magnetic energy, Many believe that this is the storehouse from which substorms draw their energy, releasing it quite rapidly. ...

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Общая Астрономическая Конференция > Практика > Астрономические наблюдения > Полярное сияние! Взгляды на небо! ... Просмотр полной версии : Полярное сияние! ... Только что мне позвонил Стас Короткий и сказал, что над Москвой наблюдается полярное сияние, и притом разноцветное. ... В Питере с 18-го по 31-ое марта стояли ясные ночи (и какие ночи - сказка!), а ночь 31.03/01.04 как раз зятянуло напрочь http://www.starlab.ru/ubb/frown.gif Думается, и над нами могло бы быть. ...

... A typical density of energetic ions is 1 per cubic cm., and the ions are matched by electrons, generally of lower energy. ... This region is almost empty of plasma--typical density 0.01 ion/cubic cm., the "best vacuum" in the Earth's vicinity--but it contains a relatively strong magnetic field which, since it fills a large volume, can store appreciable magnetic energy, Many believe that this is the storehouse from which substorms draw their energy, releasing it quite rapidly. ...

... 1993: . Based on the microwave observations of the Sun on the RATAN-600 and the Large Pulkovo Radio Telescope with high spatial and frequency resolution a new model of interaction of the photospheric and coronal magnetic fields in active regions was finalized. ... Archive . ...

... SAO RAN RATAN-600 EXCURSIONS 40 YEARS of R/T REFERENCES . ... GPS radio sources . ... Thursday, April 30, 10-00 . ... Friday, December 19, 10-30 . ... N. Bursov, V. Chaykin, A. Storozhenko "Preliminary results of RATAN-600 antenna measurements with the help of the geostationary Satellite Turksat 2A/3A". ... The basic results. ... Information-analytical system of estimating the parameters of radio sources in continuum with the RATAN-600 (the message for a conference, IPA St. Petersburg). ......