... It was designed to observe the solar wind approaching Earth, from a position near the Lagrangian point L1, and it is part of the International Solar-Terrestrial Physics (ISTP) Initiative . ... The original plan called for "Wind" to approach its final station over two years, undergoing two close encounters with the Moon to boost its speed. ... If however the object is moving , the encounter is not symmetric, and in the end the spacecraft may have gained or lost speed, depending on its trajectory. ...

The Wind spacecraft. ... It was designed to observe the solar wind approaching Earth, from a position near the Lagrangian point L1, and it is part of the International Solar-Terrestrial Physics (ISTP) Initiative . ... The original plan called for "Wind" to approach its final station over two years, undergoing two close encounters with the Moon to boost its speed. ... For additional details and updates, see the home page of the "Wind" mission. Exploration" home page (index) Glossary . ...

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. ...

... November 17, 1999 . A Leonid Meteor Explodes . ... Explanation: Tonight, a lucky few may see a meteor explode. Over the next 36 hours the Earth will pass unusually close to debris expelled from Comet Tempel-Tuttle , causing many sand-sized particles from this comet to enter and burn up in the Earth's atmosphere. ... The 1998 Leonids was noteworthy for its many bright meteors. In the above slow-loading sequence , a 1998 Leonid was caught exploding over Los Alamos, New Mexico. ...

Mariner 10 . ... Mariner 10 was the seventh successful launch in the Mariner spacecraft series, and the first to use the gravitational pull of one planet ( Venus ) to reach another ( Mercury ). ... It measured 1.39 meters (4.56 feet) diagonally and 0.457 meters (1.5 feet) in depth. ... Views of Mariner 10 . ... Venus/Mercury Mission . ... Launched in November 1973, this mission provided new information about Mercury and Venus in the Mariner program's first dual-planet mission. ...

... Sun images . ... November : 2015 . ... Image of Sun's photosphere obtained 09.11.2015 at 23:40 UT with HMI instrument on board SDO spacecraft . ... Image of Sun's magnetic field obtained 09.11.2015 at 23:52 UT with HMI instrument on board SDO spacecraft . ... Image of Sun's transition region obtained 09.11.2015 at 23:36 UT with AIA instrument on board SDO spacecraft . Image of Sun's corona . Image of Sun's corona obtained 09.11.2015 at 23:36 UT with AIA instrument on board SDO spacecraft . ...

Armagh Observatory, 13 November 2001: . The Leonid meteors, or shooting stars, are produced by debris from comet Tempel-Tuttle . ... Leonid Dust Trails . This year, however, according to calculations by Armagh Observatory astronomer Dr David Asher , the Leonid meteor shower will be exceptional in having several storm-level peaks on Sunday, 18th November superposed on the normal background level of activity. ... Leonid Dust Trail Theories (PDF Format) by David Asher . ...

... A Leonid Meteor Explodes . ... As our Earth passes unusually close to debris expelled from Comet Tempel-Tuttle, many sand-sized particles from this comet are entering and burning up in the Earth's atmosphere. ... Leonid Watching . ... The annual Leonid meteor shower should peak this weekend and some predictions suggest that "storm" rates of a thousand or more meteors per hour are possible for observers located in eastern North and Central America during the early morning hours of Sunday, November 18...

... HST . WF/PC-1 Instrument Science Reports . ... Missions . ... Annual Reports . ... Future Missions and . ... Missions Office . ... HST Peer Review Process . ... HST Overview . ... Servicing Missions . ... Cycle 24 Announcement . ... Reporting Problems . ... HST Science Year in Review . ... During the UV Flood procedure executed 25-29 Dec 1990, UV grism (G200L) exposures of AGK+81D266 (a hot circumpolar subdwarf O star and UV (not optical) flux standard) were taken on all 8 WF/PC chips. ...

... 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 . ...

GRANAT is the Russian x-ray sattelite launched to the high apogee orbit (200,000 km) and operated almost for 10 years (1989 -1999) , carrying out four major instruments: French SIGMA coded-mask hard x-ray telescope (30-1000 keV), Soviet ART-P coded-mask telescope (2??-60?? keV), all-sky monitor WATCH (6-150 keV), and a gamma-burst detector PHEBUS . ... Since September 1994, GRANAT is in the survey mode. ... Explore pages devoted to individual GRANAT instruments (including main scientific results): . ...