The Sun is our nearest star and the source of energy for life on Earth. ... For centuries astronomers wondered whether they were clouds floating in the Sun's atmosphere, but we now know that they really are huge regions of magnetic field, about as intense as the field at the poles of an iron magnet. ... Such abrupt events were named solar flares , and what made them especially interesting was that occasionally, after a prominent flare, a magnetic storm would erupt on Earth. ...

... Reflective targets are placed on each panel (38000+) . ... Back fit for camera position and determine position of each target (no distance scale, only angles). ... North/south support cables have tieback cables that can be adjusted to pull the cable catenary close to the spherical shape. ... Errors along each north/south set of targets (.pdf) . median and rms Errors for each north/south set of targets (.pdf) . ... Red are targets above north/south support cables, red are in between . ...

... Io's surface is active. ... Details of the crazed cracks criss-crossing Europa's frozen surface are apparent in this mosaic of the Galileo spacecraft's latest images of Jupiter's ice-covered moon. ... Europa's Surface . ... Voyager spacecraft images of Europa's surface, like the one above, are suggestive of sea ice on Earth. ... Leo Triplet Spiral Galaxy M65 . ... Spiral galaxy M65 is a normal spiral galaxy not unlike our own Milky Way. ... Is there life beneath Europa's frozen surface? ...

If you look at your reflection in the bottom of a well, What you see is only on the surface. ... On the bottom words are shallow. ... You can only judge the distance by the company you keep In the eyes of the CONFESSOR. ... You can't hide from the eyes (of the Confessor) Don't you even try. In the eyes of the Confessor You can't tell a lie, You cannot tell a lie (to the Confessor) Strip you down to size, Naked as the day that you were born, Naked as the day that you were born. ...

Image Quality and Stability Criteria Alex Rea adr34@cam.ac.uk Cavendish Lab oratory, University of Cambridge FTT Meeting Friday 7th May 2010 Alex Rea ( Cavendish Labs, Cambridge ) Image Quality and Stability Criteria 7th May 2010 1/9 Off-Axis Angle · MTF reference surfaces · MRTD test systems · Spectrograph mirrors ... Image Quality and Stability Criteria 7th May 2010 9/9 Alex Rea (Cavendish Labs, Cambridge) ...

For thirty years an extraordinary star has baffled astronomers - until now. V652 Her has a surface made almost entirely of helium. Stars create helium in their centres but it is rarely exposed on the surface and then only with other products of nuclear burning such as carbon. ... Many years ago, before the formation of the solar system, two Sun-like stars formed and began to evolve, first to become red giants and then helium white dwarfs. ... Simon Jeffery ( csj@star.arm.ac.uk ) . ...

... Recent Topics . ... Newsletter : July 2014 : International Space Science Institute . ... Тема: Newsletter : July 2014 : International Space Science Institute . ... 33 Teams have been selected for implementation from the proposals received in response to the 2014 Call for International Teams by the Science Committee. ... If you prefer not to receive future email from the International Space Science Institute, please unsubscribe here. International Space Science Institute . ... MAO NASU . 2014 ...

Authors: V.A. Marsakov , Yu.G. Shevelev , . Journal: 1988, Astron Zh. ... Absolute magnitudes, metallicities, effective temperatures, surface gravities, distances, and tangential velocities are calculated for 5498 F stars with homogeneous data on uvby photometry and proper motion, and placed within 80 pc from the Sun. Components of space velocities, eccentricities of galactic orbits, perigalactic and apogalactic distances, and maximal remotness from galactic plane are presented for 1787 stars. ...

... Alfred Merrill Worden . NASA Astronaut (former) . ... Married to Jill Lee Worden (Hotchkiss). ... He served as a member of the astronaut support crew for the Apollo 9 flight and as backup command module pilot for the Apollo 12 flight. ... Scott and Irwin collected approximately 171 pounds of lunar surface materials on their three expeditions onto the lunar surface; and Worden logged 38 minutes in extravehicular activity outside the command module, "Endeavour." ...

... Gallery . Simulation Images . Simulations of convection in stars . Surface intensity of a Solar simulation . Sidebar Left . Sidebar Top . No Sidebar . Sidebar Bottom . Sidebar Right . ... Title: Surface intensity of a Solar simulation . ... NOTE: All images are copyright and must not be reproduced or mirrored in any form without written permission. ... Dimensions: 150 x 150 px . ... Surface intensity of a Solar simulation б©Regner Trampedach . ...

... Publications . ... NASA ADS . The Astronomical Journal . The Astrophysical Journal . ... ASP CONFERENCE SERIES e-Book Access Site . ArXiv e-prints . Yong Stars - Publications . ... Crimean Astrophysical Observatory (Ukraine) . Campo Imperatore Observatory(Italy) . Central Astronomical Observatory at Pulkovo (Russia) . Spesial Astrophysical Observatory (Russia) . ...

... This year's eclipse is unique in duration. ... Although, at the present time, there are 6 solar observatories belonging to leading space agencies in orbit around the Earth, the eclipse of 22 July, 2009, will only be seen by two of them: the Russian CORONAS-PHOTON satellite equipped with TESIS telescopes and Japan's HINODE satellite fitted with an XRT space telescope. ... TESIS will be the first of the two devices (and the very first on Earth) to witness the solar eclipse. ...

... The spatially resolved structure near the hydrogen emission H line was found in the spectrum taken with the BTA/SCORPIO in June, 2013. ... The fragment of the Nova V1494 Aql spectrum is shown in Fig.1. ... The Nova V1494 Aql has passed the stage of the supersoft X-ray source (SSS) in the period between 218 and 516 days after the visible light maximum (Schwarz et al., ... The spectrum of Nova V1494 Aql taken on 2013 June 9 with BTA/SCORPIO . ... The vertical lines are the lines of night sky emission....

Titan . ... Hubble Space Telescope Images of Titan's surface . ... Later that year, it will release the European-built Huygens probe for a descent through Titan's atmosphere. ... This artist's rendering shows the European Space Agency's Huygens probe descending into the atmosphere of Saturn's moon Titan after being released by NASA's Cassini spacecraft. ... This artist's rendering shows the Huygens probe on the surface of Saturn's moon Titan after being released by NASA's Cassini spacecraft. ...

ATM Forum Message . ... Post . ... Testing Convex Surfaces. ... Post Message | ... There are several ways to test convex surfaces. You can test through the glass. ... Next is making a test plate and doing the convex measurement just like doing two flats against each otehr. ... Next is using a larger lens to test the surface. ... www.astronomy.net . ... Forum posts are Copyright their authors as specified in the heading above the post. "dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET" . ...

... The Main Problems of the Course. ... Some Knoleges from Mechanics, the Main Dynamics Equations for Bodies of Variable Mass, Meshchersky Equation. ... Rocket Motion on Powered Trajectory. ... The Law of Attracting Centre Distance Change. ... The Main Integrals of Motion. Satellite Orbit Equation, Motion Velocity, Orbital Period. ... Forces Affecting on the Artificial Satellites of the Earth. ... Influence of Planet Oblateness on Satellite Motion, Influence of Atmospheric Braking on Satellite Orbit. ...

... January 10, 1999 . Venus' Once Molten Surface . ... JPL ), MIPL , Magellan Team , NASA . ... This computer reconstruction of the surface of Venus was created from data from the Magellan spacecraft . Magellan orbited Venus and used radar to map our neighboring planet's surface between 1990 and 1994. Magellan found many interesting surface features, including the large circular domes , typically 25-kilometers across, that are depicted above . ... About APOD > . ... NASA Technical Rep.: ...

. My astronomical research interests center on galaxy structure and evolution. Current topics include: . Polar-ring and interacting galaxies (see also new catalogue ) . Galaxy warps: statistics, properties and origin . Spiral galaxies at z~1: radial and vertical structure of stellar disks, statistics of interactions . Surface photometry and kinematics, dynamical modeling . Observational cosmology . Joomla Counter since Sep 1997

Compilation of Surface Brightness . HyperLeda home | Documentation | Search by name | ... Search an object in the surface brightness catalogue . The surface brightness in magnitudes per square arcsec (mag arcsec -2 ) . ... Surface brightness at effective radius . ... Effective mean surface brightness within the effective radius (equivalent radius in which half the total flux is emitted). ... Quality Flag The quality flag has the following meaning: . ... regular measurement . ...

... Solar System . ... Comets and Asteroids . ... Vision of Vesta: a dark feature with a diameter of approximately 100 kim near the asteroid's equator can be seen in this image from Dawn (Image credit: NASA/JPL-Caltech/UCLA/MPS/DLR/IDA) . Between Mars and Jupiter lies the Asteroid Belt. ... The Dawn space probe is expected to go into orbit around Vesta on 16 July, from there it will return some detailed images and other data, staying at the asteroid for about a year before setting off to visit Ceres. ...