... 8.12.1999 . ... But now observers have seen elusive optical flashes on the lunar surface - likely the fleeting result of impacting meteoroids. ... And ... the next chance to observe lunar impact flashes is coming up! Enterprising astronomers interested in long distance lunar prospecting should be monitoring the dark side of a nearly first quarter Moon during the Geminids meteor shower which will peak around December 13. ... December 1999 . ... Publications with keywords: Leonids - Moon - impact . ...

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• Астронет > Moon Struck
• Journal "Peremennye Zvezdy"
• Ancient Craters on Saturns Rhea

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• Evolution of Intelligence
• Recently Acquired Images of SL9

... December 8, 1999 . Moon Struck . ... Explanation: Craters produced by ancient impacts on the airless Moon have long been a familiar sight . But now observers have seen elusive optical flashes on the lunar surface - likely the fleeting result of impacting meteoroids. ... It has been estimated that the brightest flashes were made by meteoroids weighing around a tenth of a kilogram, resulting in lunar craters about one meter across. ... About APOD > . ...

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• APOD: 2012 November 22 - Night of the Long Leonid
• APOD: 2001 December 8 - Moon Struck
• APOD: 2000 July 21 - Eros Craters And Boulders

... 24sep08: long recovery vs alfa rotation angle. ... On 23sep08 around 14:00 hours data was taken with alfa on the sky to see how long the recovery took. ... 2 172 MHz Bands per beam . ... On 24sep08 around 17:00 data was taken with alfa and the pdev spectrometer to measure the long recovery time versus the rotation angle of alfa. ... As alfa rotates, different beams have larger/smaller recovery times. ... This is the same data as the total power plots above. beam 0 alfa rotation= 0 deg . ... page up ...

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• water ice on mercury
• pdev_birdies_25jun07

Educator's Guide to Impact Craters . ... Just about all craters have deep central depressions, raised rims, and a blanket of ejected material surrounding them. ... Look for classical cratering features: basin, raised rim, ejecta blanket (material excavated from the crater and dumped around it, visible as white flour on the colored powder), and rays (material shot out at high velocity forming lines pointing directly away from the impact site). ... The material lies like a blanket around the crater. ...

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• Uranus' Moon Titania
• Jupiter Moon Callisto
• Titan Press Release

T he Moon is the only natural satellite of Earth : orbit : 384,400 km from Earth diameter : 3476 km mass : 7.35e22 kg C alled Luna by the Romans, Selene and Artemis by the Greeks, and many other names in other mythologies. ... The Moon's gravitational attraction is stronger on the side of the Earth nearest to the Moon and weaker on the opposite side. ... From our perspective on the Earth's surface we see two small bulges, one in the direction of the Moon and one directly opposite. ... Earth .. ...

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• Titan Press Release
• Jupiter Moon Callisto
• Venus Picture List

... 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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• Armagh Observatory

... When the Voyager 2 spacecraft flew by the planet Uranus in January 1986, astronomers were treated to their first close-up glimpse of the satellites that orbit the seventh planet. ... But by far the most intriguing of those 15 satellites was a jigsaw-puzzle world called Miranda . ... How dark was it at Miranda? One of the Voyager scientists put it this way: Taking pictures in the Uranus system is like trying to do photography in a ballpark at night when the only light comes from a single candle. ...

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• ASP: The Surface of the Moon
• ASP: An Ancient Universe - Changes in the Solar System
• ASP: What If the Moon Didn't Exist?

... Any water on Mars is locked up in the ice caps. ... The most recent successful mission to Mars is the Mars Science Laboratory better known as the Curiosity rover. ... CuriosityтАЩs primary role is to search for conditions that may have once been able to harbour any sort of bacterial life concealed beneath the Martian surface. ... Using what we know about life on Earth, where there is water, there is life, signs of water may help us understand what Mars was like billions of years ago. €а . ...

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• Rings Around an Asteroid | Astronotes
• The One Year Crew | Astronotes
• A Rolling Stone on the Moon | Astronotes

Program "Ма riner ":research of Venus . ... It was established also, that the period of rotation of Venus around axis - long, about 243 earth day is, more, than cycle time around of the Sun (224,7 day), therefore on Venus "day" is longer than year and the calendar is completely unusual. ... This vehicle has only once passed about Venus. ... They also have confirmed, that the period of rotation of the upper layer of clouds only 4 day, so a structure of a Venus atmosphere not similar on earth. ...

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... The ejecta cone will detach. ... Mission Trajectory Launch Ja n 2, 200 4 Earth Flyby D ec 31, 2004 SUN S/C S/C Ea r th Orbit · · · Tempel 1 Orbit (5.5 year Period) Impact July 4, 2005 dsun = 1.51 AU dearth = 0.895 AU Earth at Encounter Perihelion July 5, 2005 dsun = 1.51 AU dearth = 0.900 AU Approach: E-2 mo to E-24 hr (E = impact event) · Images and spectra of coma to study rotation Impactor release: E-24 hr to E · Color images of coma and nucleus · Spectra of coma and nucleus ...

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• High Resolution HST Images of Pluto and Charon (ESO Press Release 09/94)
• ESO - Release of ALMA Long Baseline Campaign Science Verification Data

. This image, from NASA's Mars Global Surveyor, shows a young lava flow (darker formation in lower middle part of picture) lying atop an older surface on Mars (lighter regions, upper right and lower left). The lava flow has visibly fewer impact craters than the background terrain, illustrating the general principle that crater numbers can reveal ages of surfaces. The 500-meter scale bar is approximately 500 yards long, or the length of 5 football fields. NASA, JPL and Malin Space Science Systems

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• http://www.astronomy.com/sitefiles/resources/image.aspx?item=%7BE603E435-C00A-474E-9C27-21A45FF8D8C1%7D
• Cassini's long weekend: nine moons in 62 hours | Astronomy.com
• Lunar scientists shed light on Moonт??s impact history | Astronomy.com

Astrophysics Group: USS Drongo Briefing To: From: CC: Date: Re: Captain Howard Astrophysics Group Ships Computer 05/06/02 Initial Conclusions from Astrophysical Observations Summary We have landed at one of the poles of Ziggy. ... Ziggy's moon is in an orbit that carries it over the poles. ... At our current location, the sun will be above the horizon for half a ziggy year, and then below the horizon for half a ziggy year, just like at the poles of the · · Page 1 Earth. ...

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• http://www.mso.anu.edu.au/pfrancis/roleplay/ziggy/model_answer1.doc
• Lecture 7: Motion and Iteration
• The primary mirror, no longer a perfect figure

... The Earth's surface receives more light per unit area. ... The Earth is closer to the Sun. ... At what time does the Third Quarter Moon rise? a) 9:00 AM b) 12:00 Noon c) 9:00 PM $d) 12:00 Midnight When the moon is in its last quarter , when does it rise and set? a) sunrise, sunset b) sunset, sunrise $c) midnight, noon d) noon, midnight Why don't lunar eclipses happen at every full moon ? $a) The Moon 's orbit doesn't always take it through the Earth's shadow. b) The Moon 's ...

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• Evolutionary Effects
• A ``long'' FFT
• Eyes on the Sky, Feet on the Ground: Chapter Six

... The Round Earth . ... Some of the names he used for the Moon's crater are of persons discussed in "Stargazers"-- Tycho (distinguished by bright streaks that radiate from it), Ptolemy ("Ptolemaeus"), Copernicus , Kepler , Aristarchus , Hipparchus , Erathosthenes ; Meton and Pythagoras are on the edge, near the northern pole. ... Those moons display " palimpsest" craters which are merely surface markings, because as time passed, the walls which originally existed sagged back onto the flat surface. ...

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• The Sun
• Space Research Institute (IKI) Seminar
• The Rotating Earth

... How long can a technological civilisation survive before it destroys itself and/or its environment? . the IPAT equation (see Kates) . ... The industrial revolution at its bleakest . ... The detritus from industrial civilisation can have long term effects on both the surface layers of the Earth and the atmosphere. ... Certain chemicals in some commercial aerosols dissociate ozone, depleting the protective layer in the Earth's atmosphere. ...

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• Optical Long-Slit Spectroscopy of a Sample of Spiral Galaxies
• Conservation Laws, Orbital Parameters, and Solar System Bodies
• Current Long Range Planning HOTSPOTS

The Sizes of Impact Craters and Ejecta Spots on Asteroids . ... The formation of ejecta during the cratering process is characteristic for meteoritic impacts. On a simple impact model, analytic expression for a size of impact crater and ejecta spot are derived. ... Very Long Baseline Interferometry (VLBI), Small Solar System Body (SSSB), asteroids, an impact model, meteoritic impacts, cratering process, impact craters, ejecta spots. ...

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• Keywords_206
• Keywords_216
• Keywords_196

... Bad Astronomy . ... Bitesize Astronomy . ... Bad Astro Store . ... Site Info . ... It is from from Voyager 1 and shows a whopping big impact crater dominating the profile of the moon. Note that Mimas is about 400 kilometers across (about 250 miles). ... The wall around the crater is 5 kilometers high, and that central peak rises 6 kilometers above the surface (many impact craters have a large central peak which is caused by a pressure rebound from the impact). ... 2008 Phil Plait. ...

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• Phil Plait's Bad Astronomy: Misconceptions
• Phil Plait's Bad Astronomy: Bad TV
• Phil Plait's Bad Astronomy: Bitesize Tour of the Solar System

This diagram illustrates the fact that the list marker box has no impact on the position of the principal list box. ... For the upper list, the list marker box (which contains a bullet) is outside and to the left of each list item principal box. For the lower list, the list marker box (which contains a bullet) is the first inline box inside each list item principal box. ... A label reads, "The left sides of the list item boxes are not affected by marker placement." ...

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• Long description for sample document tree diagram
• Long description for punctuation and drop cap example
• Long description of example illustrating floating

... Astrophysics Group . ... COAST . COAST Astronomical Results . ... Surface Imaging of Betelgeuse . ... This page highlights some astronomical results obtained with COAST over the years. These are listed in chronological order (most recent first). ... Measurements of cyclic variations in the angular diameter of Chi Cygni . ... The first infrared image from an aperture synthesis array . ... The images of Betelgeuse below were reconstructed from COAST data taken in early 2004. ...

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