Astronomy Picture of the Day . ... Credit Copyright: G ran Strand Explanation: A long solar filament stretches across the relatively calm surface of the Sun in this telescopic snap shot from April 27. ... How long is the solar filament? ... Tracking toward the right across the solar disk a day later the long filament erupted, lifting away from the Sun's surface. ... April . ... April 2015 . ... Publications with keywords: Sun - filament . Publications with words: Sun - filament . ...

... Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. 2015 April 30 . Across the Sun . ... Explanation: A long solar filament stretches across the relatively calm surface of the Sun in this telescopic snap shot from April 27. ... How long is the solar filament? ... Tracking toward the right across the solar disk a day later the long filament erupted, lifting away from the Sun's surface. ...

... Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. April 30, 1999 . Solar Shock Wave . Credit: Barry Reynolds (Perth, Australia) and the SOHO - EIT Consortium . ... On planet Earth, observer Barry Reynolds photographed the expanding shock front (left) in the light emitted by hydrogen atoms at the solar surface. ... About APOD > . ...

Program Number . ... Gordon Drukier, Yale University . Shooting Stars: Looking for Direct Evidence of Massive Central Black Holes in Globular Clusters . Abstract . ... Hubble Heritage Observations of Arp 148 . ... The Sloan Digital Sky Survey (SDSS) has proven a powerful tool for identifying new lens candidates, although high angular resolution HST observations are essential for confirming those candidates as genuine gravitational lensing systems (see Program GO 10886). ... Past weeks: . ...

Astronotes Armagh Planetarium's Stellar Blog! ... Moon . ... Space Flight . ... Earth Satellites . ... February . ... By admin February 16, 2012 Posted in: Moon . A roll?n?rock can be seen in this image from NASA?s Lunar Reconnaissance Orbiter. ... This rolling stone gathered no moss but left its track in the regolith until the slope levelled off and it slowed to a halt. ... Then the Moon shone down on an Earth that€а looked superficially familiar to that of today but was oddly different. ...

... About ATNF overview . ... Both are consistent with earlier estimates, computed for the population of optically selected galaxies. This consistency occurs because, although the distribution of optical central surface brightnesses among galaxies is flat, we fail to find a population of galaxies with central surface brightnesses fainter than 24б  B - , even though there is no observational selection against them. Keywords: Galaxies: Luminosity Function, Mass Function; Surveys . ...

... SUN MOON MERCURY VENUS MARS, JUPITER SATURN . ... Mars . ... What is the mass of the Heat Shield Rock meteorite on Mars? Shouldn't it have left a crater when it hit? Instead, it looks like it is just sitting "passively" on the surface as if gently placed there. ... Because the meteorite lies near the rover s discarded heat shield, the MER team dubbed it Heat Shield Rock. ... Just make sure you're registered with the website. Get instant access to subscriber content on Astronomy.com! ...

home publications > mercury . SEARCH ASP SITE: Match ALL words Match ANY word . ... ASP Conference Series . Monograph Publications . IAU Publications . ... Publications of the ASP (PASP) . ... Mercury Magazine . ... Order Mercury Issues . Mercury Advertising Rates . ... The Universe in the Classroom . ASP E-mail Newsletters . ... Astronomy Beat . ... Mercury Magazine Contents . ... March/April 1996 . ... Astronomers may discover we are not alone in the universe. ... publications . ...

... Articles | ... Forums . ... 230 deg . 49 deg . ... 130 deg . ... More Info . ... 210 deg . ... 168 deg . ... 249 deg . ... 195 deg . ... 271 deg . ... 110 deg . ... 338 deg . ... July 15 . 247 deg . ... 224 deg . ... 340 deg . ... July Phoenicids (PHE) . ... August 10 . 341 deg . ... 339 deg . ... 307 deg . ... 334 deg . ... 335 deg . ... 286 deg . ... 327 deg . ... 262 deg . ... 102 deg . ... 153 deg . ... 117 deg . ... December 2 . ... 123 deg . ... 100 deg . ... www.astronomy.net . ...

Star formation is often best manifested by bright H II regions.These are regions of hydrogen which have been ionized by ultraviolet photons which are emitted from massive stars (typically stars more than 20 times the mass of the Sun). ... A narrowband filter image centered on this wavelength will then readily reveal these H II regions and hence the current sites of star formation in a galaxy, The luminous blobs that can be seen here are all H II regions . ... NGC 3558 Visual . NGC 3558 Infrared . ...

... They had expected to see impact craters like those on the other terrestrial bodies and from their number per unit area to estimate the age of Io's surface. ... This may have been the most important single discovery of the Voyager missions; it was the first real proof that the interiors of other "terrestrial" bodies are actually hot and active. ... A nalysis of the Voyager images led scienties to believe that the lava flows on Io's surface were composed mostly of various compounds of molten sulfur. ...

... For SIMS (Secondary Ion Mass Spectrometry) analysis, a solid surface is bombarded by primary ions of some keV energy. ... The subsequent mass analysis of the emitted ions provides detailed information on the elemental and molecular composition of the surface. ... Extremely short ion pulses with a duration below . ... By rastering a fine-focussed ion beam over the surface, like an electron beam in an electron microprobe, mass resolved secondary ion images (chemical maps) can be obtained...

... Science Users Information > Science and Technical Meetings > Conferences 2011 > ALMA ES MSF workshop . ... With these deadlines fast approaching, we are organizing a workshop with the aim of providing a place for members of the European massive star formation community to get together to discuss ideas for potential ALMA Early Science projects. ... At the community days there will be talks/discussions outlining the ALMA Early Science specifications, proposal preparation process, data reduction etc. ...

... Bad Astronomy . ... On Thursday, February 15th 2001 (and replayed on March 19), the Fox TV network aired a program called ``Conspiracy Theory: Did We Land on the Moon?'', hosted by X-Files actor Mitch Pileggi. ... Dust around the lander . ... However, it appeals to our common sense: when the sky is black here on Earth, we see stars. ... Bad: The program claims that when the top half of the lander took off from the Moon to bring the astronauts back into orbit, there was no flame from the rocket. ...

... Long secondary periods in AGB stars: an investigation of their origin . Wood P.R., Olivier E.A., Kawaler, S.D. 2004, ApJ, 604, April 1. ... Wood P.R. 2003, in "Mass-losing Pulsating Stars and their Circumstellar Matter", eds. Y. Nakada M. Honma (Kluwer) . MSX sources in the LMC: Dust-enshrouded AGB stars, post-AGB stars and PN . ... Wood P.R., Cohen M. 2001, in "Post-AGB Objects as a Phase of Stellar Evolution", eds. R. Szczerba and S. K. Gorny, ASSL, 265, 71 . ... Wood P.R. 2000, in IAU Coll. ...

... One of this year's largest mass ejections from the Sun's atmosphere was recorded last Sunday by TESIS telescopes aboard the CORONAS-PHOTON satellite ( video - wmv 4.3 MB ). ... Over the course of a week, two gigantic solar prominences were simultaneously ejected from the surface of the Sun. ... Earth will not feel the Sun's influence either. ... The TESIS observatory ї TESIS: www.tesis.lebedev.ru . ... One of this year's largest mass ejections from the Sun's atmosphere (movie WMV, 4.3 MB) . ...

... S. G. Pugacheva. Sternberg State Astronomical Institute, Moscow, 119899, Russia, pugach@sai.msu.ru . ... Sternberg State Astronomical Institute, Moscow University, Russia, pugach@sai.msu.ru . ... Sternberg State Astronomical Institute, Moscow University, 13 Universitetsky pr., ... Sternberg State Astronomical Institute, Lomonosov Moscow State University, Universitetskii pr. ... S. G. Pugacheva and V. V. Shevchenko, Sternberg State Astronomical Institute, Moscow University, 13 Universitetsky pr., ...

... Armagh Observatory, College Hill, Armagh BT61 9DG, +44 (0)28 3752 2928 . ... This takes you past the village of Killylea (about 5 miles from Armagh), and then across the River Blackwater past the entrance to the Caledon Estate and into the architecturally attractive village of Caledon, approximately nine miles from Armagh. ... View of the Knockmany Chambered Cairn from the south, showing the modern enclosure. ... In its present state the cairn is an almost circular mound approximately 25m in...

... OOF . ... OOF Index . ... OOF software . ... Fits up to fifth order . ... These are experimental data currently being analysed, not final documentation of research. ... Only fitting for Zernike orders up to and including 3rd to concentrate on finding possible off-axis aberrations. ... The results below show that when fitting for all Zernikes up to and including fifth order, the output maps vary greatly between pixels. As above, but fitting up to fifth order Zernike polynomial. ...

... The Moon’s surface is covered with the great number of ring structures - ring mountain (circuses) and by shocked origin (meteoritic) (see the Moon craters and their peculiarity ). ... The temperature in the Moon surface is changing from 400 to 100K. The composition and structure of the Moon. ... There is difference in the mineralogical composition of the Moon and of the Earth: for example, the oxides of iron in the Moon basalt are 25% - more, and titan - 13% more then in the terrestrial. ...