... 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. ...

Supernova Cosmology: Legacy and Future, (preprint) . Goobar, A. and Leibundgut, B. Annual Reviews of Nuclear and Particle Science , 2011, 61, 251 . Cosmological Implications from observations of Type Ia Supernovae, . ... Type Ia Supernovae, . ... Leibundgut, B., Suntzeff, N. B. in "Supernovae and Gamma-Ray Bursts", 2003, . ... Cosmology with Supernovae, . ... Leibundgut, B. in Frontiers of Cosmology, 2005, . ... Twenty Years of SN 1987A . ... ApJS, accepted . ... ApJ, 782, 28 . ...

... Constructing and Reducing Sets of HST Observations Using Accurate Spacecraft Pointing Information A. Micol and B. Pirenne Space Telescope -- European Coordinating Facility, ESA/ESO, Garching D­85748, Germany P. Bristow 1 Space Telescope -- European Coordinating Facility Abstract. ... All this is possible thanks to the reliable HST pointing information provided by the jitter files which are a product of the Observatory Monitoring System software at STScI. ... The current format jitter files contain: ...

... Members . ... The ATM's of Boston was founded in 1934 by a group of persons interested in assisting others in the art of optical polishing the craft of telescope making, and to learn together about the science of astronomy and the use of astronomical instruments. ... Mr. Jones introduced the club to Dr. Harlow Shapley at Harvard College Observatory. ... Regular shop activities resumed with the help of these "professional amateurs" and the club grew to 180 members. ... Club Newsletters . ...

International Workshop NAROO-GAIA "A new reduction of old observations in the Gaia era", Paris Observatory, June 20-22, 2012 Registration of participants of Workshop NAROO-GAIA Before the first meeting OPENING OF THE WORKSHOP The natural planetary satellites are observed since centuries in order to understand their dynamics and their evolution. ... Science results, reports, data mining. ... L. Beauvalet: Strong need of a new reduction of Pluto's old observations W.Thuillot: very important. ...

Solar High Resolution Studies . ... Solar Group . ... High quality observations obtained in recent years have highlighted the fact that the solar atmosphere is extremely dynamic, and wholly permeated and shaped by magnetic fields at very small spatial scales. ... The Solar Group in Arcetri is initiating a project to study some of the topics and techniques that will be brought to the forefront of solar physics as this new physical regime is explored. ... Small Scale Activity . ...

... Both sets of objective transmission gratings consist of hundreds of co-aligned facets mounted to supporting structures on 4 annuli (one for each of the four co-aligned mirror pairs) to intercept the x rays exiting the HRMA. ... The two sets of transmission gratings, attached to the mounting structure are shown in Figure . ... An individual facet has 0.43-m-thick gold grating bars with 50% filling factor and 9920- period, resulting in 1.15-/mm dispersion. The HRC-S is the primary LETG readout. ...

... This step is done mostly interactively and uses some basic ad-hoc IDL procedures, mainly for testing and checking of the consistency of the results.Once the observations have been selected and the count spectra extracted, the available spectra of each background level are accumulated. ... Average QUALITY such that QUALITY =0|1 Exposure times are added and the total is written in the EXPOSURE keyword of the header of the output FITS file. Finally, the CCFs are built from these templates. ...