... Solar System . ... Planets . ... Saturn is the sixth planet from the Sun and is the second largest in the solar system. A day on Saturn is 10 hours 39 minutes long, and it takes 29.5 Earth years to revolve about the Sun.€аThe atmosphere is primarily composed of hydrogen with small amounts of helium and methane.€аAt the last count it had 62 Moons, but it is another feature of this gas planet which makes it spectacular, its ring system. ... The first man to notice the rings of Saturn was Galileo. ...

... Tonight's Sky . ... The Magazine . ... Observing . ... The double star 54 Leonis, spiral galaxy NGC 3198, and emission nebula NGC 3199 . ... Astronomy for Kids . ... Observing springtime deep-sky objects with a large telescope . ... Bright planets meet at dusk . ... Astronomy magazine subscribers can read the full article for free. ... Get instant access to subscriber content on Astronomy.com! ... Receive news, sky-event information, observing tips, and more from Astronomy's weekly email newsletter....

Astronomy Picture of the Day . ... Credit Copyright: Juan Carlos Casado ( TWAN ) Explanation: Venus and Jupiter will appear unusually close in the sky over the next month. The planetary conjunction will be easily visible to the unaided eye because Venus will appear brighter than any background star, and Jupiter will be nearly as bright. ... Publications with keywords: Jupiter - Venus - conjunction - Moon . Publications with words: Jupiter - Venus - conjunction - Moon . ... Moon Meets Jupiter . ...

... August 14, 1995 . Mercury: Closest Planet to the Sun . ... Explanation: This picture was compiled from images taken by the NASA spacecraft Mariner 10 which flew by the planet three times in 1974. Mercury is the closest planet to the Sun , the second hottest planet (Venus gets hotter), and the second smallest planet (Pluto is smaller). Mercury rotates so slowly that one day there - "day" meaning the normal time it takes from sunset to sunset - lasts 176 days on Earth . ...

I was wondering what conditions should be met to have the "darkest" sky .. ... Upon the above publication of the Southern Galactic hemisphere, TunГ Tezel started seeking opportunities to create the Northern counterpart image. ... So, the initial quest of having the darkest possible sky have delivered us these two all-sky images of the two galactic hemispheres as seen from Planet Earth. Zoomable and 'full-screenable' fisheye view of the "darkest sky" Southern Galactic Hemisphere image. ...

... Armagh Observatory, College Hill, Armagh BT61 9DG, +44 (0)28 3752 2928 . Armagh Observatory, 11 June 2015: Armagh Observatory reports that the next two weeks will provide an interesting opportunity to observe the brightest planet, Venus, and the largest planet, Jupiter, as they move towards one another in the evening twilight. ... The image shows the sky view towards the West at around 11pm on 20 June 2015. ... Professor Mark E. Bailey, Armagh Observatory, College Hill, Armagh BT61 9DG. ...

3) Planets and Brown Dwarfs . ... By its nature, this method is most sensitive to massive planets orbiting close to their stars. ... That means that some of the more massive extrasolar planets could actually be brown dwarfs (although the statistics of the finds suggest that most of them are not). ... Another possible difference between brown dwarfs and massive planets is how they are born. ... They would base the fundamental definition on the mode of formation: a planet is built from planetesimals. ...

Astronomy Discussion Forums . ... Atm ћ Astrophotography ћ Blackholes ћ Blackholes2 ћ CCD ћ Celestron ћ Domes ћ Education . ... Stars And Planets In Greece (?) ... Post Message | ... Posted by Eve on May 20, 2004 19:46:21 UTC . ... Re:Stars and planets in Greece (?) - optics - May 21, 2004 - 02:50 UTC . ... www.astronomy.net . About Astronomy Net | ... Forum posts are Copyright their authors as specified in the heading above the post. "dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET" . ...

... Below is a near-final schedule for the meeting "Planets Beyond the Solar System and the Next Generation of Space Missions," to be held at STScI in Baltimore on October 16, 17, and 18, 1996. ... New programs for the detection and study of planets (interferometry, photometry, microlensing) . ... Spinoffs and benefits of planet detection programs and contributions of these programs to understanding planet formation and evolution (astrophysics using small-field interferometry, NGST) . ... K. Noll, STScI...

... Bad Astronomy . Misconceptions . ... The Nine Planets . ... Nancy Lieder has lied about me to try to make me look bad . ... She claims to be channeling aliens, called "Zetans" (short for Zeta Reticulans, aliens from the star Zeta Reticuli). ... So, Ms. Lieder claimed that (the to her nonexistent) Hale-Bopp was a distraction, a part of a disinformation campaign by Those In Charge so that the teeming masses wouldn't worry about Planet X. Guess what: she was wrong! ... 2008 Phil Plait. ...

... 2000 March 20 . Mercury on the Horizon . ... Explanation: Have you ever seen the planet Mercury? Because Mercury orbits so close to the Sun, it is never seen far from the Sun, and so is only visible near sunrise or sunset . If trailing the Sun, Mercury will be visible for several minutes before it follows the Sun behind the Earth . ... An informed skygazer can usually pick Mercury out of a dark horizon glow with little more than determination. ... About APOD | ...

... Posts tagged ?close? ... For a discipline that relies so heavily on images, it is rather surprising how little use astronomy makes of the vast body of work on image analysis carried out by mathematicians and computer scientists. ... images. ... 1 Comment . ... Entries RSS . Comments RSS . ... General comments . ... vlk on [MADS] Parallel Coordinates . upvc windows on [MADS] Parallel Coordinates . ... Alfred Inselberg on [MADS] Parallel Coordinates . ... Entries (RSS) and Comments (RSS) . ...

... Recent Topics . ... MAO main . ... August Issue: How We Conquered the Planet . ... Тема: August Issue: How We Conquered the Planet . To view this email as a web page, go here. links.email.scientificamerican.com/servl.. NzIxOTM0NTcxS0 =0 . ... A new hypothesis explains why links.email.scientificamerican.com/ctt?k... ... What they find could change the future of planet hunting links.email.scientificamerican.com/ctt?k... ... Unsubscribe - links.email.scientificamerican.com/ctt?k... ... MAO NASU . ...

Intricately structured filaments of gas and dust compose the reflection nebula seen around the Pleiades star cluster. These multiwavelength images were presented to the American Astronomical Society meeting in San Antonio, TX on January 16, 1996. Click here for the press release text . ... The Schmidt data were processed further after this photo release; better versions are now available.] Get image: 512x512 (56k) / 1024x1024 (204k) . Pleiades Far-Infrared Heated Dust Emission . ...

... 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. ...

The New Solar System, 3rd Edition, Beatty and Chaikin Eds. Stardust to Planets, Harry Y. McSween, Jr. ... The Planets" opus 32 by Gustav Holst (1874-1934) performed by Andr Previn and the Royal Philharmonic Orchestra; Telarc CD-80133 Many of these are available at The Nine Planets Bookstore . ... Calvin J. Hamilton , the author of Views of The Solar System , made many of the inline images I use here. ... Ken Edgett, the author of DSN Solar System Menu provided a few more inline images. ... Credits .. ...

... Astrophysics Group . ... Exoplanets . ... Exoplanet UK Community Meeting ? Cambridge, April 14-16 2014 . Posters . ... Forming Circumbinary Planets: N-body Simulations of Kepler-34 . ... Giant planets and brown dwarfs around A-F type stars : a Harps survey . ... Dust grain velocities in exoplanets and Brown Dwarfs . ... Radio signatures of lightning discharges in exoplanets and brown dwarfs . ... 2013, Astrophysics Group, Cavendish Laboratory, JJ Thomson Avenue, Cambridge, CB3 0HE . ...

. This is a new popup window - close it when you are done . Submitted by Haldun I. Menali on 06/07/2012 09:27:24 . Venus 'moves in' . The planet Venus starts its 6+ hour journey over the Sun's disk. Logon to post a follow-up comment or review comments from others . Copyright (c) Amateur Telescope Makers of Boston, Inc. About Us Contact Us

... 8, ``Celestial Mechanics'', 2002 Investigation of stability of NEAs orbital resonance motions by numerical methods L. E. Bykova Tomsk State University, Tomsk, Russia The problem of orbital stability of resonance Near­Earth asteroids (NEAs) is considered. Most of NEAs have multiple close approaches to the inner ma­ jor planets. ... The technique of the investigation of NEAs orbital stability has been devel­ oped by author on the basis of the construction of possible motion domains (R) of asteroids. ...

... ATNF Home . About ATNF . ... About ATNF overview . ... Australia Telescope Steering Committee . ... Australia Telescope User Committee . ... Murchison Radio-astronomy Observatory . ... Parkes radio telescope . Australia Telescope Compact Array . Mopra radio telescope . ... Australia Telescope Online Archive (ATOA) . ... Visiting Parkes radio telescope . ... Parkes radio telescope webcam . ... Images . ... Teacher workshops . ... Have you ever calibrated synthesis data in Miriad or AIPS? ...