50 Miles on Pluto . ... The close-up of the icy world's rugged equatorial terrain was captured when the New Horizons spacecraft was about 47,800 miles (77,000 kilometers) from the surface, 1.5 hours before its closest approach. Rising to an estimated 11,000 feet (3,500 meters) the mountains are likely composed of water ice. Suggesting surprising geological activity, they are also likely young with an estimated age of 100 million years or so based on the apparent absence of craters. ...

... Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. 2015 July 16 . 50 Miles on Pluto . Image Credit: NASA , Johns Hopkins Univ./ ... Explanation: A 50 mile (80 kilometer) trip across Pluto would cover the distance indicated by the scale bar in this startling image. ... Rising to an estimated 11,000 feet (3,500 meters) the mountains are likely composed of water ice. ... About APOD | ...

home education > activities . ... Astronomy . ... In this collaborative group activity, teams of students use the internet to find moon myths in a number of cultures and then try to discern the astronomy behind each myth. There is a section on researching moon missions that just seems tacked on to curry favor with NASA. [e,m] . ... A field test version with good activities and background information about the Saturn system and the Cassini mission, which is scheduled to enter Saturn orbit in 2004. ...

Geomagnetic storms and substorms are a natural hazard similar to hurricanes, floods etc. ... Solar and geomagnetic activity also probably influences the Earth's climate and human health. ... Under southward directed IMF the Earth's magnetosphere is open to input from the solar wind flow. ... Since practical importance of solar wind measurements was recognized, a number of approaches was developed for prediction of the geomagnetic activity basing on the solar wind data. ...

... July 8, 1999 . Eruptive Prominence . Credit: SOHO - EIT Consortium, ESA , NASA . Explanation: Activity on our parent star continues to increase as the sun approaches a maximum in its 11-year solar cycle , expected in the year 2000. ... Earth dwellers fortunate enough to be well located in Europe , the Middle East , Asia may be able to view for themselves activity above the solar limb during the upcoming August solar eclipse - the last total eclipse of the second millennium . ...

THE RELATIVE MONTHLY MEAN SUNSPOT NUMBER ON JULY 2011 HAS MADE Wjuly =43.9, THAT GIVES FOR 25 MONTH (2011, JANUARY) DEVELOPMENT CURRENT 24 CYCLES OF SOLAR ACTIVITY THE SMOOTHED MONTHLY MEAN SUNSPOT NUMBER W*jan. ... FLARE ACTIVITY WAS AT HIGH LEVEL ON JULY, 30th, WHEN IN SUNSPOT GROUP AR11261 (N16L330, Sp=350 m.v.h) THE LARGE PULSE SOLAR FLARE OF X-RAY CLASS М9.3 WAS OCCURENCED, AT THE AVERAGE LEVEL - ON JULY, 27th, OTHER DAYS - ON A LOW LEVEL. ...

... ATNF Home . ... About ATNF overview . ... Australia Telescope Steering Committee . ... Australia Telescope User Committee . ... Astrophysics graduate student programs . ... Murchison Radio-astronomy Observatory . ... Parkes radio telescope . ... On-Line Proposal Applications and Links (OPAL) . ... Visiting Parkes radio telescope . ... Parkes radio telescope webcam . ... Astrometry is an excellent interactive site on the history and future of astrometry from ESA , the European Space Agency. ...

... Art X-Sender: moy.ed@lmmail. hst .nasa.gov X-Mailer: QUALCOMM Windows Eudora Pro Version 4.1 Date: Thu, 28 Oct 1999 17:11:54 -0400 From: Moy.Ed Moy.Ed@lmmail. hst .nasa.gov Subject: SM3A Philosophy for Gyro Anomaly Based on the current status of the RGAs as we approach SM3A , I would like to make sure that everyone understands the expected plan if another gyro fails between now and ... HST should remain in ZGSP until about an orbit >before TI-Burn as defined in ACP 8. ...

Next: M.D. Smith, Research Astronomer Up: W.M. Napier, Emeritus Honorary Previous: W.M. Napier, Emeritus Honorary . Recent years have seen a downgrading of the threat assessment due to impacts from comets and asteroids. ... Bill Napier, however, has been using new approaches to the problem and finds that the celestial hazard due to impacts may be a factor 5 higher these estimates. ... These bodies may constitute the dominant impact hazard in the 100,000 megaton range. ...

During routine astrometry with the 1.0-m to improve the orbit of the Apollo asteroid 2004 CB, the 'asteroid' was found on March 30 to have a short tail! ... it was renamed periodic comet P/2004 CB (LINEAR). ... Back to Previous News . Siding Spring Survey Main Page . ... Follow-up Astrometry with the 1.0-m at SSO . Previous News Items . Anglo-Australian Near Earth Asteroid Survey 1990-96 . ...

... Home Education Classes AAA Winter Astronomy Class: Measuring Distances in Space тАУ Dec 2015 тАУ Feb 2016 . ... Classes . AAA Fall Astronomy Class: Astronomy Basics тАУ October-November 2015 . AAA Winter Astronomy Class: Measuring Distances in Space тАУ Dec 2015 тАУ Feb 2016 . AAA Spring Astronomy Class: The Physics of Astronomy тАУ February - March 2016 . ... This MonthтАЩs Sky тАУ April 2016 . ... Dec. ... Observing Resources for Amateur Astronomers - Part 1: Beginning Observers . ...

Next: The Stopping Radius Up: ``Ecology'' of Magnetic Rotators Previous: A Gravimagnetic Rotator . We shall assume that the rotator is surrounded by an ideally conductive plasma with a density and a sound velocity at a sufficiently far distance from the rotator. ... The following classification   of magnetic rotators     is based on the essential characteristics of the interaction of the plasma surrounding them with their electromagnetic field. ... leading to a spindown   of the rotator. ...

. Computer Ephemeris. Lunar equatorial positions. Explanations. Each row contains at 0 h and 12 h of Time Dynamical Terrestrial: month, day, apparent right ascension (hours, minutes, seconds), apparent declination (degrees, minutes, seconds of arc) and geocentric distance (in Earth's radii).

... 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. ...

... More on 51 Peg: . The discovery of a Jupiter--mass planet in orbit around the solar--type star 51Peg has been reported by Michel Mayor and Didier Queloz (Geneva Observatory) on October 6th at the 9th Cambridge workshop on "cool stars, stellar systems, and the sun" held at Florence (Italy). ... Recall that the measurements of radial velocity only yield v sin i which in turn gives us M sin i. For most values of i, sin i will be greater than 0.5 and this gives a mass estimate of 0.5 Jupiter masses. ...

... Tonight's Sky . ... SUN MOON MERCURY VENUS MARS, JUPITER SATURN . ... Observing . ... Hubble captures Comet ISON . ... Comet ISON is potentially the "comet of the century" because around the time the comet makes its closest approach to the Sun on November 28 it may briefly become brighter than the Full Moon. ... Only registered members of Astronomy.com are allowed to comment on this article. ... Receive news, sky-event information, observing tips, and more from Astronomy's weekly email newsletter. ...

... There are several explanations for these X--ray quiet PMS stars. To examine the explanations, it is proper to divide the PMS stars into three groups: those bluer than R - I = 0.7, those redder than the X--ray sources (R - I > 1.25) and those with colors similar to the X--ray sources. ... A total of 26 of the non--X--ray detected PMS candidates had spectra taken. ... Between V=14 and V=16, I find 25 stars which are X--ray sources and estimate 19 non--X--ray PMS stars. ...

... 8, ``Celestial Mechanics'', 2002 CCD observations of planetary satellites and occultations and close approachments of stars by asteroids with 26­ inch refractor of Pulkovo observatory T. P. Kiseleva, I. S. Izmailov, M. A. Mozhaev Pulkovo Observatory, St. Petersburg, Russia ST--6 CCD camera has been used with 26-- inch Refractor at Pulkovo for ob­ servations of ... These estimates are \Sigma0:015 arcsec and \Sigma0:014 arcsec for X and Y correspondingly. ...

... NASA U.S. Spacesuit Knowledge Capture . ... During the program?s existence, more than 65 seminars have captured spacesuit history and knowledge; those that are available at this site have been approved for public release. For questions about the program or presentations, please contact: cinda.chullen-1@nasa.gov or vladenka.r.oliva@nasa.gov . The following presentations consist of video recordings (MPEG-4 and Ogg), transcripts (TXT),and accompanying slides and/or information (PDF). ...

... Samara State Aerospace University Staff Saleev Vladimir Anatolevich . ... Saleev V.A. , Nefedov M.A. Diphoton production at the Tevatron and the LHC in the NLO approximation of the parton Reggeization approach // Physical Review D . ... Shipilova A.V., Karpishkov A.V., Nefedov M.A., Saleev V.A. Open charm production in the parton Reggeization approach: Tevatron and the LHC // Physical Review D. 2015. ... Saleev V.A. , Shipilova M.A. Inclusive b-jet and b // Physical Review D. 2012. ...