... 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 . ...

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... Star Atlas . ... Behemoth black hole found in an unlikely place . ... black holes . ... If a supernovaт??s original star is massive enough to form a black hole, why is there any explosion? Why doesnт??t the entire mass of the original star simply fall onto the newly formed black hole and instantly vanish? ... For some massive stars, it may be possible that collapse leads directly to the formation of a black hole with no explosion. ... Get instant access to subscriber content on Astronomy.com! ...

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The radius of the event horizon of a black hole with the mass of the Sun would be about 3 kilometers, about the same size as your city, town or village. If the Earth could be compressed into a black hole, the radius of its event horizon would be 1/330,000 of this, because the mass of the Earth is 1/330,000 times the mass of the Sun. ... 30,000,000 . ... 20,000 . ... Black hole event horizon . ... MYTH: All stars collapse to become black holes upon their death. ... MYTH: Black holes are very dense. ...

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... Bad Astronomy . Misconceptions . ... Bad Astronomy : If the Sun collapses into a black hole, the Earth and all the other planets will get sucked in. Good astronomy : If the Sun were to collapse into a black hole, we would feel no difference in the gravity as measured at the Earth. ... The same applies if the Sun were to collapse into a black hole. ... Therefore, the gravity of the Sun felt at the Earth would remain the same. ... So it is with the black hole Sun. ... 2008 Phil Plait. ...

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... At full throttle the Deep Space 1 spacecraft's innovative ion drive produces about 1/50th of a pound of thrust ... a force so great that it would just about hold up a piece of paper on planet Earth! ... This exotic system - thought to be a stellar mass black hole consuming matter from a companion star - was discovered only last year as a flaring celestial x-ray source. ... Stars are born in M16's Eagle Nebula, a stellar nursery 7,000 light-years from Earth toward the constellation Serpens. ...

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... SS433 is a close binary system, one star is a supergiant, a second one is a black hole. ... Even a black hole cannot accept such an enormous mass flux, a supercritical accretion disk appears, all the excess gas glows up to several tens of thousands degrees and is ejected off the disk with enormous velocities. ... SAO researchers have found an evidence of the supercritical accretion onto a black hole in SS433, which follows from a brightness variability of the SS433 disk. ...

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... General information . ... Staff . Research staff . ... Information . ... Historical highlights . Historical research . ... This process is thought to occur in circumstellar disks of gas and dust around young stars on rather short timescales : infrared surveys show that the number of low mass stars with disks drops dramatically for stars older than 10 Myr, suggesting that in order to form large solids before the disk disperses, the growth process has to take place within a few million years. ...

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... Listed below are questions submitted by users of "The Great Magnet, the Earth" and the answers given to them. ... In "The Exploration of the Earth's magnetosphere" on the magnetic environment of the Earth in space (a few Q duplicated here) . ... 11) Magnetic Shielding . ... 51) Can electricity be generated from the Earth's magnetic field? ... 9) Measuring Earth's magnetic field . ... 6) Reversals of the Earth's field (4 queries) . ... 42) Could generated electricity affect Earth's magnetic field? ...

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... Listed below are questions submitted by users of "The Great Magnet, the Earth" and the answers given to them. ... In "The Exploration of the Earth's magnetosphere" on the magnetic environment of the Earth in space (a few Q duplicated here) . ... 11) Magnetic Shielding . ... 51) Can electricity be generated from the Earth's magnetic field? ... 9) Measuring Earth's magnetic field . ... 6) Reversals of the Earth's field (4 queries) . ... 42) Could generated electricity affect Earth's magnetic field? ...

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... From the chain visibility point of view, it is very recommended to look at the Javascript movies , especially if the frame rate can be not regulated in your MPEG player. ... The non-CH-associated large-scale chains visible on the SOHO/EIT images at three wavelengths of 171, 195 and 284 as well as on the MLSO/HAO He I 10830 spectroheliogram of December 16, 1997. ... The SOHO/EIT movies at 171 and 195 show the chain dynamics on June 1-3, 1998. ... Javascript movie (230 KB), SOHO/EIT, 171 . ...

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... Files . ... File List . File Members . casa . ... The copyright details 00005 ** follow. ... 1024 is 10 (2^10 == 1024) */ 00077 #define LOG1024 10 00078 00079 /* these are for getting the memory statistics */ 00080 static int pageshift ; /* log base 2 of the pagesize */ 00081 static int pagesize _; 00082 00083 /* define pagetok in terms of pageshift */ 00084 #define pagetok (size) ((size) ... Generated on Fri Sep 3 2010 13:06:55 for casacore by 1.7.1 ...

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... In 1969, one more Martian mission project was considered. The Martian vehicle was to be assembled in low Earth orbit using a modified N1 launch vehicle (N1M). The Mars expedition system included an interplanetary orbital vehicle housing the crew and key on-board systems; a martian lander; an Earth return vehicle (to be used by the crew for descent to Earth), propulsion power plant (nuclear reactor) with electrical propulsion engines . ... Official WEB-site of S.P.Korolev RSC Energia . ...

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Lectures . ... Home Lectures Lecture Series 2010-2011 Lecture Series 2010-2011 ? Greening the Earth Using Space Resources? by Greg Matloff . ... Lecture Series 2010-2011 . ... Beyond New York City . ... Observing Resources for Amateur Astronomers - Part 1: Beginning Observers . ... A History of the First Forty Years of the Amateur Astronomers Association . ... Amateur Astronomers Medal . ... 2016 Amateur Astronomers Association of New York Designed by Press Customizr Powered by . ...

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Astronotes Armagh Planetarium's Stellar Blog! ... Earth Satellites . ... Continue Reading.. ... No Comments Fewer than 600 people have ever seen our world from space and only a couple of dozen have travelled far enough away to seen the Earth as a planet against [ ] . ... Posted on December 1, 2011 | ... 1 Comment Ice Worlds, one of Armagh PlanetariumтАЩs Digital Theatre shows for Summer 2011, is a thrilling tour through space and time showcasing some of the most beautiful and chilly regions of [ ] . ...

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Blackholes2 Forum Message . Forums: . Atm · Astrophotography · Blackholes · Blackholes2 · CCD · Celestron · Domes · Education . ... Discussion Forums | ... Holeum - Black Matter Mystery Resolved? Forum List | ... Post Message | ... www.astronomy.net . About Astronomy Net | Advertise on Astronomy Net | ... Forum posts are Copyright their authors as specified in the heading above the post. "dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET" . ...

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Russian SHAREABLE DATA CENTER Institute of Solar-Terrestial Physics SB RAS . ... Investigations of the ionospheric response to strong magnetics storms which are usual for our latitudes, are of great interest. ... In the figure, we present ionospheric parameter dynamics during three perturbed days in July 2000. ...

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... Events . ... The Event Horizon Telescope: Observing Black Holes with Schwarzschild-Radius Resolution . ... Galaxy lies a super massive black hole - 4 million times more massive . ... Universe to spatially resolve and image a black hole Event Horizon. ... For the much more massive (6 billion solar mass) black hole . ... for assembling a submm-VLBI Event Horizon Telescope. ... emission near the event horizon of super massive black holes. ... Copyright (c) Amateur Telescope Makers of Boston, Inc. ...

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IV International Astronomy Olympiad . ... Text of these problems is available also . ... To solve every problem you may use constants and well-known values you know by heart. ... The apparent diameter of the Moon, as seen from the Earth, is 31'. ... Can you observe a star with magnitude . ... Consider the stars as black bodies. ... Estimate the diameter of a black hole constructed using this patent from a ship with the mass of 5000 tn (1 tn = 1000 kg). ... What stars would you observe this nigth? ...

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... It is know as Creed. ... From Creed 'The Inca' ruled the vast empire. ... Levels 3, 4, and 5 will : work very well for deathmatch as they : are smaller Difficulty Settings : Implemented New Sounds : Yes New Graphics : Yes New Music : Yes Demos Replaced : None; by choice Dehacked/BEX Patch : No Other files required : No * Music * Music Section Name Of Music D_INTROA : Rock You - Queen Intro : Sweet Dreams - Marilyn Manson Intromission : Tonight, Tonight - Smashing Pumpkins ...

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