... These other worlds are the moons of our Solar System , of which there are approximately 170 in orbit around our planets.Some of these moons are very interesting, and have diverse and unique features, very different to our barren, heavily cratered Moon .Jupiter, the largest planet in our solar system has the most moons of any planet with known 64 moons in orbit.The four ... Ganymede, the largest moon in the Solar System thought to have oceans located underneath its icy surface.( ...

... Current APO Weather . ... Search Site . ... Information for New Users . ... Technical Staff pages . Night Logs and Mailing Lists (maintained by APO) . ... Technical Documents and Database Search . ... Observer's Documentation and Procedures . ... Problem Reporting and APO Technical Documents Database Search . ... APO Drawing/Document Management Procedures . ... APO Technical Documents Database Search . Home Astrophysical Research Consortium . ... Mail Lists (maintained by APO) . ...

... Painting with Solar Neutrons . ... Solar flares are propelled high above the Sun's surface by powerful, twisted magnetic fields. ... A Total Solar Eclipse . ... A Quasar-Galaxy Collision? ... Stars orbit the center of the cluster, and the cluster orbits the center of our Galaxy. ... If you look closely at the center of the above photograph, you will see a spiral galaxy behind the field of stars. ... Such a high abundance of these young blue stars may cause a galaxy to be designated a starburst...

Supernova 2009js in NGC 918 . This page is devoted to information on Supernova 2009js in NGC 918 . Basic information on this SN, including the last reported brightness, on this Supernova can be found on the main page . Information on the original web pages for many of these images can be found on the updates and links web pages. Discovered independently by Lick Observatory Supernova Search (USA) and Koichi Itagaki (Japan). ... 2009/10/11.44 . 17.2 . ... Joseph Brimacombe . ...

... Editor's choices for the most educational Astronomy Pictures of the Day about orbiting observatories: . ... The trouble is that Earth-bound telescopes must look through the Earth's atmosphere . ... Telescopes which explore the Universe using light beyond the visible spectrum, such as those onboard the Chandra X-ray Observatory need to be carried above the absorbing atmosphere. ... By orbiting above the Earth's atmosphere, the Hubble Space Telescope, pictured above , can get clearer images. ... Index...

A team using CSIRO 's Parkes radio telescope has just found the thousandth pulsar known to science. ... This is thanks to the power of a new instrument on the telescope, the multibeam system , which has slashed the time it takes to scan the sky," said co-leader of the pulsar team, CSIRO's Dr Dick Manchester . ... There are many different types of pulsar, and we have only a few examples of some types," said Dr Manchester. ... E-mail: rmanches@atnf.csiro.au . ... e-mail: hsim@atnf.csiro.au . ...

. " The Arecibo Observatory is sponsored by the National Science Foundation. Any opinions, findings and conclusions or recommendations . expressed in this publication are those of the author(s) and do not necessarily reflect the views of the National Science Foundation."

... Armagh Observatory, College Hill, Armagh BT61 9DG, +44 (0)28 3752 2928 . ... A bright nova has recently been discovered in the constellation of Delphinus (The Dolphin). ... The nova was confirmed late on August 14 at a magnitude of 6.3 (in a dark sky the faintest naked-eye stars are approximately 6.0 magnitudes - the lower the magnitude the brighter a star). ... Nova explosions occur in binary systems composed of a star similar to our Sun but only ~1/10 of its mass, and a star called a white dwarf. ...

. Pulkovo Observatory of Russian Academy of Sciences is situated . near Saint-Petersburg. It was founded in 1839. 196140, Saint-Petersburg, Pulkovskoye chaussee 65/1 . English version . Russian version . This page has been accessed times since May 1, 1999.

... Science Users Information > Science and Technical Meetings > Conferences 2005 > vltiws05 . ... Instrumentation Development . ... The second part (2 days) will be organized as a joint workshop between the European Interferometry Initiative (EII) and ESO on "2nd Generation VLTI Instrumentation". The purpose of the Workshop is to present and discuss the additional instrumentation required in the next 5-8 years to optimize the scientific return of the Very Large Telescope Interferometer (VLTI). ...

... Leon Koopmans, Kapteyn Institute . Imaging the mass structure of distant lens galaxies . Abstract . ... Gamma-Ray Bursts from Start to Finish: A Legacy Approach . ... David Turnshek, University of Pittsburgh . ... Quasars at Redshift z=6 and Early Star Formation History . ... The long/soft bursts appear to originate in the collapse of very massive stars, while the short/hard bursts are coalescing binary systems (probably pairs of netron stars or black holes). ... Past weeks: . ...

... November 5, 1997 . The Milky Way's Gamma-Ray Halo . Credit: D. Dixon ( UCR ), D. Hartmann ( Clemson ), E. Kolaczyk ( U. Chicago ), NASA . Explanation: Our Milky Way galaxy appears to be surrounded by a halo of gamma rays . Gamma rays are the most energetic form of electromagnetic radiation , with more than a hundred thousand times the energy of visible light, but known gamma-ray sources don't account for the diffuse distribution of this high-energy glow. ... About APOD > . ...

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