... Tonight's Sky . ... The Magazine . ... Star Atlas . ... An artificial comet holds secrets to Earths life . ... Astronomy for Kids . ... Observing springtime deep-sky objects with a large telescope . ... The planet has extreme temperature swings and perhaps active lava flows. ... A digital supplement to Astronomy magazine. ... Join TravelQuest International with Astronomy and Discover magazines on one of three great tour options surrounding this celestial spectacle . ... Astronomy Magazine . ...

... 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 . ...

... These Frontier Fields will combine the power of HST with the natural gravitational telescopes of high-magnification clusters of galaxies. ... We are soliciting gravitational lensing maps for the last four Hubble Frontier Fields clusters (MACSJ0717.5+3745, MACSJ1149.5+2223, AbellS1063, and Abell 370) based upon the exceptionally deep HST FF imaging and other new ancillary data. ... For the full set of proposal instructions and requirements, see the FY16 Frontier Fields Lensing Map Call for Proposals....

Astronotes Armagh Planetarium's Stellar Blog! ... Armagh Planetarium . ... Solar System . ... Moon . ... Space Flight . ... Earth Satellites . ... Concept Spacecraft . ... Monthly Sky Notes . ... This image of Earth (left) and the Moon (right) was taken by the Juno space probe's JunoCam, three weeks after its 5 August launch. (image credit:: NASA / JPL / MSSS) . ... Earth and the Moon form a тАЬdouble planetтАЭ unique in the Solar System. ... Subscribe to Astronotes . ...

... 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. ...

Today's APOD | ... Editor's choices for the most educational Astronomy Pictures of the Day about Mars: . APOD: 2006 May 15 - Volcanic Bumpy Boulder on Mars . ... Several similar rocks are visible near Bumpy Boulder that likely have a similar past. ... During Earth 's recent pass between Mars and the Sun , the Hubble Space Telescope was able to capture the most detailed time-lapse pictures ever from the Earth . ... APOD: 2001 July 18 - Mars from Earth . ... Index | ... About APOD | ...

... The space tether experiment, a joint venture of the US and Italy, called for a scientific payload--a large, spherical satellite--to be deployed from the US space shuttle at the end of a conducting cable (tether) 20 km (12.5 miles) long. The idea was to let the shuttle drag the tether across the Earth's magnetic field, producing one part of a dynamo circuit. ... One purpose of such a set-up might be to produce electric power, generating current to run equipment aboard the space shuttle. ...

... Files in red?history) . ... Auroral Currents . 25H. Birkeland Currents . ... As noted earlier Kristian Birkeland, reporting in 1903 on his expeditions to the auroral zone, proposed that magnetic disturbances accompanying the aurora were caused by large electric currents flowing down the length of auroral formations. ... In later years these currents became known as the auroral electrojets , and considerable debate ranged over their cause and the way their circuit might be completed. ...

... Assembly of The International Space Station . ... Credit Copyright: NASA 's Johnson Space Center Explanation: It is the largest and most sophisticated object ever built off the Earth. ... The featured animation shows the piece-by-piece construction of the ISS from 1998 to 2011. ... 1997 1998 . ... 2011 2012 . ... Publications with keywords: ISS - space shuttle . Publications with words: ISS - space shuttle . ... International Space Station Transits Saturn . Earth and Milky Way from Space . ...

... NASA's Hubble Space Telescope has detected a long-sought population of comets dwelling at the icy fringe of the solar system . The observation, which is the astronomical equivalent to finding the proverbial needle-in-a-haystack, bolsters proof for a primordial comet reservoir just beyond Neptune , currently the farthest planet from the Sun . ... The comet-disk lies just beyond Neptune and might stretch 500 times farther from the Sun than Earth . ... Comet Introduction Kuiper Belt Objects . ...

Подписка на рассылку обзоров astro-ph на Subscribe.Ru . ... Предыдущий выпуск (N335) . ... Обсудить на форуме Scientific.RU . ... Подписка на рассылку обзоров на Subscribe.Ru . Обзоры препринтов astro-ph . ... Собственно обзоры препринтов. ... Ранее обзоры также были на Астронете и на Scientific.Ru . ... АНКи доступны на Астронете , а с 2006 по 2008 г. также на сайте Элементы.Ру . ... Ранее они также размещались на сайте Астронет и в архиве моих обозрений (кодировка KOI8) на сайте Scientific.Ru . ...

... 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) . ...

This page describes the Twitter feed that gives the current location of the Chandra X-ray Telescope. ... Further information on Chandra can be found at: . ... Tracking Chandra . ... The twitter feed is actually a simple Haskell program that grabs the current location from the Science@NASA Chandra Track page, and then uses the GeoNames web service to convert this location into something more readable than a latitude and longitude. ... If you have any other ideas send them to the Chandra Twitter feed . ...

The Arecibo Observatory-- at nearly 1000' across--is the world's largest radio and radar telescope. Located in northwestern Puerto Rico, the original facility was built 40+ years ago, but it underwent major upgrades in the 1970s and in 1997-99. ... The observatory operates with a staff of about 125 and a yearly budget of about $12M, 5/6ths of which comes from NSF-astronomy and most of the remainder from NSF-atmospheres. ... This will extend the telescope's life by 20-30 years. ...

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... Bad Astronomy . ... Mad Science . ... Where is the Hubble space telescope currently? (near what planet?) You may be surprised by this, but the Hubble Space Telescope (HST) is orbiting the Earth! ... At that height, HST is above almost all of the Earth's atmosphere, which gives it a clearer view of the sky than telescopes on the Earth. ... You can find pictures and info from STIS here , which is a page brought to you by the Space Telescope Science Institute . ... 2008 Phil Plait. ...

... PUBLIC LECTURE - APRIL 12, 2016 . New Discoveries in the Outer Solar System: Ceres, Pluto and Planet X . ... Dr. Green will talk about "New Discoveries in the Outer Solar System: Ceres, Pluto, and Planet X". ... Beginning in 1992 planetary astronomers began to find Pluto like objects beyond the orbit of Neptune showing us that Pluto was a member of an entirely new family of objects we now call the Kuiper Belt. ... Amateur Astronomers Association of Princeton, Inc., ...

... 85.6, THAT GIVES FOR 58 MONTH (2013, APRIL) DEVELOPMENT CURRENT 24 CYC- LES OF SOLAR ACTIVITY THE SMOOTHED MONTHLY MEAN SUNSPOT NUMBER W*apr.= ... 7.65 --------------------------------------------------------------------------- Weekly Bulletin on Solar and Geomagnetic Activity Highlights on 28.10 - 03.11.2013, Forecast on 04 - 11.11.2013, Carrington Rotation 2143 (25,43.10.2013) SUNSPOT-FORMING ACTIVITY OF THE SUN REMAINED AT THE HIGH LEVEL. ... Class E(1-8A) AR RII/IV CME X / opt. ...

How Precise is the Orbit of (99942) Apophis and how Probable is its Collision with the Earth in 2036? ... At present the orbit of asteroid (99942) Apophis and the forces acting on it are not known with sufficient accuracy to predict with certainty its motion after the close approach to the Earth in April of 2029. As a result of this approach the current heliocentric orbit of the asteroid will be changed by Earth's gravity. ...

... ALMA | ... Currently I spend most of my time working on advanced phase calibration techniques and instrumentation for ALMA . ... I joined the team in April 2009 and started by looking at the effects of the dispersive path delay on phase correction (ALMA Memo 590) . ... We're currently analysing the copious quantities of WVR test data recently taken (Jan-March 2010) at the high ALMA site. 50% of my time is dedicated to the ALMA atmospheric temperature profiler. ... ALMA Site . ... 2010 Emily Curtis |...