... 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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... 2014 September 21 . Saturn at Equinox . Credit: Cassini Imaging Team , ISS , JPL , ESA , NASA . Explanation: How would Saturn look if its ring plane pointed right at the Sun? ... Every 15 years, as seen from Earth, Saturn's rings point toward the Earth and appear to disappear . The disappearing rings are no longer a mystery -- Saturn's rings are known to be so thin and the Earth is so near the Sun that when the rings point toward the Sun, they also point nearly edge-on at the Earth. ...

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• APOD: 2009 September 30 - Saturn at Equinox
• APOD: 2006 September 27- Earth from Saturn
• APOD: 2004 September 19 - Earth's North Magnetic Pole

... Saturn at Equinox . ... Credit Copyright: Cassini Imaging Team , ISS , JPL , ESA , NASA Explanation: How would Saturn look if its ring plane pointed right at the Sun? Before August 2009, nobody knew. Every 15 years, as seen from Earth, Saturn's rings point toward the Earth and appear to disappear . ... In August 2009, that Saturn-orbiting spacecraft, Cassini , was able to snap a series of unprecedented pictures of Saturn's rings during equinox . ... August . ... Prometheus and the F Ring . ...

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• APOD: 2006 September 27- Earth from Saturn
• Equinox at Saturn
• Journal "Peremennye Zvezdy"

... With enough velocity, a spacecraft can break loose from the Earth's gravity and enter an orbit around the Sun, like that of a planet. If it then orbits the Sun with the same period as the Earth--one year--it may keep a fixed position relative to Earth. ... If the distance is just right--about 4 times the distance to the Moon or 1/100 the distance to the Sun--the spacecraft, too, will need just one year to go around the Sun, and will keep its position between the Sun and the Earth. ...

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• FAQ: "The Great Magnet, the Earth"
• The Earth's Magnetosphere-- History
• The Sun

... With enough velocity, a spacecraft can break loose from the Earth's gravity and enter an orbit around the Sun, like that of a planet. If it then orbits the Sun with the same period as the Earth--one year--it may keep a fixed position relative to Earth. ... If the distance is just right--about 4 times the distance to the Moon or 1/100 the distance to the Sun--the spacecraft, too, will need just one year to go around the Sun, and will keep its position between the Sun and the Earth. ...

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• FAQ: "The Great Magnet, the Earth"
• The Earth's Shadow
• FAQ: "Exploration of the Earth's Magnetosphere"

... Pre-university education . ... Samara region . ... A small spacecraft Aist-2D , developed by the scientists of Samara State Aerospace University (SSAU) and the experts of the Rocket and Space Centre Progress will see from outer space what is hidden under the thick top of trees and below the Earth's surface. The radar equipment was installed on Aist-2D , which was delivered to the space launcher complex Vostochniy on January 22. ... Tomography of the Earth's ionosphere will also be carried out. ...

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Astronotes Armagh Planetarium's Stellar Blog! ... Space Flight . ... Earth Satellites . ... Leonid meteors seen from 13 km altitude aboard an aircraft during the 1999 Leonids Multi-Instrument Aircraft Campaign (Leonid-MAC). Comet Tempel-Tuttle provides the cometary debris for the Leonid meteor shower. ... Every 17-19 November Earth crosses Tempel-TuttleтАЩs orbit and the Leonids become visible. With clear, dark skies observers may see 10 to 15 Leonid meteors every hour on those mornings. ...

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• Earth | Astronotes - Part 2
• Was the 21 September Fireball a Second Moon? | Astronotes
• Fireball of 21 September 2012: Image of the Month | Astronotes

... Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. September 4, 1998 . Nozomi: Earth and Moon . Credit: Nozomi MIC Team , ISAS . ... This stunning picture of the crescent Earth-Moon system was taken by Nozomi's onboard camera on July 18 from a point in space about 100,000 miles from the Earth and 320,000 miles from the Moon. ... About APOD > . ...

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• Automated Spacecraft
• Educator's Guide to Robotic Spacecraft
• Pioneer 10 & 11

... Our restless globe and its companion. ... A Look at the Motions of the Earth in Space and How They Are Changing . ... Earth's rotation as viewed from above the north and south geographic poles. ... The Earth revolves around the Sun-also counterclockwise viewed from above the North Pole, clockwise viewed from the South Pole-to give us our years (see Figure 2 ). The plane of the Earth's orbit is called the ecliptic (where eclipses happen). ... Earth's orbit as viewed from the north ecliptic pole. ...

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• ASP: To Every Season There is a Reason
• ASP: Shadow Play: 1998's Total Solar Eclipse
• ASP: Flattening the Earth

Image credit: Michael Nolan, Arecibo Observatory. These radar images of near-Earth asteroid 2001 SN263 were obtained on 2008 Feb 12 and 13. ... Image from Feb 12 . ... First near-Earth triple asteroid discovered by Arecibo Observatory . ... was discovered this week by astronomers at the sensitive radar telescope at Cornell University?s Arecibo Observatory in Puerto Rico. ... For example, Arecibo has discovered more than half of the near-Earth binary asteroid systems discovered since 1999. ...

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• Solar System Studies at AO

.

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• Formation of the Earth's Atmosphere and Oceans
• Formation of the Earth

... Jay Apt (Ph.D.) . NASA Astronaut (Former) . ... PUBLICATIONS: Dr. Apt shared his images and knowledge in the publication Earth in Orbit : NASA Astronauts Photograph the Earth , written in conjunction with NASA scientists Michael Helfert and Justin Wilkinson and published by the National Geographic Society. ... From 1976 to 1980 he was a staff member of the Center for Earth & Planetary Physics, Harvard University, supporting NASA s Pioneer Venus Mission by making temperature maps of Venus from Mt. ...

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• Astronaut Bio: Peter J. K. Wisoff 11/2001
• Astronaut Bio: Shannon Lucid (02/2012)
• NASA Oral History Project

... 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. ...

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• Phil Plait's Bad Astronomy: Bitesize Astronomy
• Phil Plait's Bad Astronomy: Mad Science
• Phil Plait's Bad Astronomy: Bad News

... Comments, Opinions Publications Dnepr Program . Dnepr launch record 17 August 2011. Cluster Launch of Dnepr LV 22 August 2013 KOMPSAT-5 Launch 21 November 2013. ... The Sych-2 satellite is being developed as a part of the space optical-range Earth observation system by the State Design Office of Yuzhnoye and built by the Industrial Association Yuzhny Machine Building Plant in cooperation w ith other space industry entities upon the state order of the National Space Agency of Ukraine . ...

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• ISC Kosmotras will provide launch services for two Earth-observation satellites
• The first national Earth remote sensing satellite of Turkey will be placed into

... In spite of the good potential possibilities, some of the station "Dnepr" design characteristics did not allow us to apply the usual special IS radar measurement methods. ... Thus for IS signal measurements at the "Dnepr" station, we have developed special methods for recording and processing IS signals in order to determine plasma ionospheric parameters. ... Equations (4-5) from the basis for data post processing to obtain ionosphere parameters. ...

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• East Siberian Center for the Earth's Ionosphere Research. IS radar schedule.
• East Siberian Center of Earth Ionosphere Research. Chirp ionosonde.
• East Siberian Center for the Earth's Ionosphere Research. SW radiosignal

... Current APO Weather . ... Search Site . ... Information for New Users . ... Technical Staff pages . Night Logs and Mailing Lists (maintained by APO) . ... Technical Documents and Database Search . ... Observer's Documentation and Procedures . ... Problem Reporting and APO Technical Documents Database Search . ... APO Drawing/Document Management Procedures . ... APO Technical Documents Database Search . Home Astrophysical Research Consortium . ... Mail Lists (maintained by APO) . ...

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• lsst.tcc: tcc::Earth Class Reference
• lsst.tcc: src/earth.cc Source File
• lsst.tcc: include/tcc/earth.h Source File

... Цвет: EARTH . ... Модель: LOCH POINT . Сезон: FW16 . ... Вы сможете менять свой образ благодаря съемному помпону, так что Billabong Loch Point не скоро Вам надоест. ... Шорты от Under Armour из серии HeatGear обеспечивают прохладу, остаются сухими и гарантируют отличный комфорт при носке. Материал HeatGear в сочетании с волокном меш в передней части отводит влагу от кожи. ...

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The Earth. ... The middle raiding of the Earth is 6371,032 km, the pole 6356,777 km equatorial - 6378,160 km. The Earth surface area is 510,2 mln km^2, 70,8% of which is the World ocean. ... According to the modern cosmogonical views the Earth was formed 4,6 - 4,7 billions years ago from the protoplanet cloud captured by the Sun. ... The Earth is conditionally divided into 3 parts: a bark a cloak and a core (in the centre). The external layer - the bark is 35 km thick. ... Above the Earth. ...

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• antichnoste
• grinvichmeridiane
• redkoste

... Gift Center . ... Why do aurorae appear strongest within rings centered on Earth's poles instead of filled-in circles? ... RELATED TOPICS: AURORAE . The visible aurorae result from electrons that move along magnetic field lines from space into the upper atmosphere. ... Just make sure you're registered with the website. Get instant access to subscriber content on Astronomy.com! ... If you are already registered on Astronomy.com, please log in below. ...

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• The Solar Dynamics Observatory observes Earth, lunar transits in same day |
• NASA releases images of Earth by distant spacecraft | Astronomy.com
• As Earth was molten early during its formation, dense metals should have sunk

... July 22, 2009 - The X-ray Solar Eclipse . The Russian TESIS (FIAN) Solar Observatory has transmitted observations back to Earth of the solar eclipse made on July 22nd, 2009. ... And 4 hours later, when almost all the inhabitants of the Earth had already said goodbye to the eclipse, TESIS telescopes captured images of the second deepest transit of the Moon across the Sun ( film 1.2 MB, wmv format ). ... July 20, 2009 - The TESIS Observatory will observe two solar eclipses from space . ...

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• Earth Seen By NASA's Moon Mapper On India's Chandrayaan-1 Spacecraft -
• The Russian TESIS Observatory will observe two solar eclipses from space
• The X-ray Solar Eclipse