... 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 . ...

Astronomy Picture of the Day . A Lunar Eclipse on Solstice Day . ... Credit Copyright: Jerry Lodriguss ( Catching the Light ) Explanation: Sometime after sunset tonight, the Moon will go dark. This total lunar eclipse , where the entire Moon is engulfed in the shadow of the Earth, will be visible from all of North America , while the partial phase of this eclipse will be visible throughout much of the rest of the world. ... Publications with keywords: lunar eclipse - solstice - shadow . ...

... Bad Astronomy . Misconceptions . ... Bad Astronomy : "That's as remote as the dark side of the Moon!" ... As the tired, hackneyed refrains went on, one in particular caught my ear: " Fly me away to the bright side of the moon, and meet me on the other side." ... As the Moon orbits the Earth, different parts of it get illuminated by the Sun. ... Bad Addendum : At the end of the album "Dark Side of the Moon" by Pink Floyd, there is a voiceover that actually says "There is no dark side of the moon. ...

This section describes the calculation by which Aristarchus used the duration of a total lunar eclipse to deduce the distance of the Moon. ... This lesson plan supplements: "How Distant is the Moon--1", section #8c: on disk Shipprc2.htm , on the web . ... The shadow of the Earth at the Moon's distance is narrower than the Earth, because the Sun is seen not as a point but as a disk 0.5 degrees wide. ... An eclipse of the Moon is the passage of the Moon through the shadow of the Earth. ...

... On the morning of Thursday, 26 February, amid the Gal pagos Islands, the Sun will fade from view. Not the culmination of ancient prophecy, but none less mystical, Earth's small Moon will be executing a slow slide past the enormous Sun. ... And anyone living in southern North America, Central America, northern South America, or on islands and cruise ships in the Caribbean Sea will, weather permitting, have the opportunity to experience the wonder of a solar eclipse. ...

... 2007 March 2 . Solar Eclipse from the Moon . ... For example, skywatchers in Europe, Africa, and western Asia will be able to see the entire spectacle of the Moon gliding through Earth's shadow, but in eastern North America the Moon will rise already in its total eclipse phase . Of course if you traveled to the Moon's near side , you could see the same event as a solar eclipse, with the disk of our fair planet Earth completely blocking out the Sun. ... About APOD | ...

Educator's Guide to Eclipses . ... In a solar eclipse you observe the Sun (using only safe methods, of course). ... In a lunar eclipse you observe the Moon. ... Because of the geometry described below, you can only view a solar eclipse when the Sun is up, and the Moon is nowhere to be seen. ... Eclipses occur when the Sun, Earth and Moon line up. ... In a solar eclipse the Moon passes directly in front of the Sun. ... In a lunar eclipse the Moon moves into Earth's shadow. ...

... Eclipses of the Moon in 2009 : . In 2009 there are four eclipses of the Moon (tree penumbral eclipses on February 9, July 7, and August 5-6 and a partial eclipse on December 31). ... Moon enters penumbra (P 1 ) . ... Moon leaves penumbra (P 4 ) . ... Eclipse, lunar : . ... It may be total (the Moon passing completely through the Earth's umbra ), partial (the Moon passing partially through the Earth's umbra at maximum eclipse), or penumbral (the Moon passing only through the Earth's penumbra ). ...

... SUN MOON MERCURY VENUS MARS, JUPITER SATURN . ... Moon . ... Supernova showered Earth with radioactive debris . ... Why do we see only one side of the Moon from Earth? Have humans explored the other side, and, if so, is it different from the nearside? ... The Moon orbits Earth once every 27.3 days and spins on its axis once every 27.3 days. This means that although the Moon is rotating, it always keeps one face toward us. ... Get instant access to subscriber content on Astronomy.com! ...

Astronomy Discussion Forums . ... Total Lunar Eclipse May 15-16 . ... Post Message | ... A total Lunar Eclipse. On the night of May 15-16 the Earth will come between the Sun and the Moon casting a shadow that will slowly cover the Moon. ... The last total Eclipse was on a day where it snowed 10? all day. ... www.astronomy.net . About Astronomy Net | ... Forum posts are Copyright their authors as specified in the heading above the post. "dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET" . ...

Hipparchus (and possibly Aristarchus before him) also derived the Moon's distance from the duration of a lunar eclipse . Because the Earth casts a much larger shadow than the Moon, such an eclipse usually darkens the entire Moon, for several hours. ... If the Sun is assumed to be very distant, and if the Moon crosses the middle of the shadow (if not, corrections must be made), the width of the shadow is expected to be about 2r , twice the Earth's radius r . ... Last updated 4 February 1999 Moon. ...

... In particular, members of the project regularly organize events dedicated to various interesting astronomical phenomena and events - solar and lunar eclipses, transit of Venus, etc. A total lunar eclipse will occur on April 15th, 2014, the first in two and half years. ... GLORIA will travel to Peru to broadcast the event live. ... Lunar eclipse . Lunar eclipses occur when the Moon passes into the Earth's shadow. ... A partial eclipse will be visible from the Canary Islands. The broadcast . ...

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Astronotes Armagh Planetarium's Stellar Blog! ... Solar System . Sun . ... March . ... The extent of the solar eclipse of 3 November€а 2013 at 13:22 UTC as seen from Accra, Ghana. We will see a similar sight.€а (Image credit: Kwabena under Creative Commons Licence) . ... Your viewing location is not important as long as it offers an unobstructed view of the south eastern sky.. ... You can use ?eclipse glasses? to view the Sun, these are made from aluminized Mylar filter material. ...

... 8, ``Celestial Mechanics'', 2002 Canon of solar eclipses in Russia for the interval 1000--2050 M. V. Lukashova, L. I. Rumjantseva Institute of Applied Astronomy, St. Petersburg, Russia Solar eclipses are quite rare events. ... The Canon contains the basic data about the solar eclipses observed in ter­ ritory of the former USSR (in boundaries of 1990) from 1000 to 2050 with the magnitude of phase exceeding 0.1. ... Beginning from 1887 several canons of solar eclipses were published. ...

I was wondering what conditions should be met to have the "darkest" sky .. ... Upon the above publication of the Southern Galactic hemisphere, TunГ Tezel started seeking opportunities to create the Northern counterpart image. ... So, the initial quest of having the darkest possible sky have delivered us these two all-sky images of the two galactic hemispheres as seen from Planet Earth. Zoomable and 'full-screenable' fisheye view of the "darkest sky" Southern Galactic Hemisphere image. ...

... Arecibo Observatory took radar images of asteroid 1998 QE2 and its moon as the space rock sailed safely past earth. ... Both the asteroid and its moon passed 6 million kilometers (3.8 million miles) from earth. ... Radar images of asteroid 1998 QE2 (bottom) and its satellite (top) on June 6. ... Radar images of asteroid 1998 QE2 (center) and its satellite (bottom left) on June 7. ... Radar image from June 7 showing the satellite moving past the primary. ...

Phases of the Moon Phases of the Moon are not caused by the Earth's shadow. They are due to a change in our viewing perspective as the Moon orbits around us as it is lit by the Sun. ... The Earth spins in the light, so that the entire Earth gets to be lit at some point each day. Even though the Moon is always half-lit like the Earth is, sometimes we on the Earth see only a tiny bit lit, other times completely lit, depending on where the Moon is in its orbit around the Earth. ... Look at Day 7. ...

... First Contact Moon begins to move over Sun from West Starts at ~5:44:45 AM (about 10 minutes after sunrise) Must observe sun with filter! Good time to check and adjust mount tracking and alignment Watch for sunspots 6/21/ 2001 - Zambia ( Mario Motta ) First Contact Crescent images of Sun Natural pin-holes such as leaves on trees Pin-holes in cardboard Mario Motta Watch sky and environment Gradually darkens Temperature drops 8/11/1999 Hungary (Eric Pauer) ~1 min Before Second ...

Michele Bannister . Other research . ... The mutual events of Haumea . The dwarf planet Haumea is the parent of a collisional family that includes its two moons, Hi'iaka and Namaka. ... The arid and windswept McMurdo Dry Valleys of Antarctica are carpeted with the polygons of patterned ground , a geological formation that is also seen on the northern plains of the planet Mars. ... I worked to understand the influence that buried masses of ice have on the development of patterned ground. ...