... Star Factory Messier 17 . ... Sculpted by stellar winds and radiation, the star factory known as Messier 17 lies some 5,500 light-years away in the nebula-rich constellation Sagittarius. ... Mt Hood and a Lenticular Cloud . ... One of the brightest galaxies in planet Earth's sky is similar in size to our Milky Way Galaxy: big, beautiful M81. ... A false-color composite image in extreme ultraviolet light from the Solar Dynamics Observatory captures the moment, recorded on April 11 at 0711 UTC. ...

... 2006 February 26 . Inside the Eagle Nebula . ... A closer look at the Eagle Nebula , however, shows the bright region is actually a window into the center of a larger dark shell of dust . Through this window, a brightly-lit workshop appears where a whole open cluster of stars is being formed. ... Already visible are several young bright blue stars whose light and winds are burning away and pushing back the remaining filaments and walls of gas and dust. ... About APOD | ...

... Stars . ... Straight away the three stars in his belt will grab your attention, followed by the glittering white star Rigel in his left foot and the bright orangish star Betelgeuse in his right shoulder (assuming Orion is standing facing us and not with his back to us). ... Orion Belt?s with the stars Alnitak, Alnilam and Mintaka. ... In short, Orion was a big, loud giant of a man and indeed a mighty hunter, he also inherited some aquatic superpowers from his father who was the sea god Neptune. ...

... Bringing news from across the Universe to children all around the world . ... Astronomers want to learn more about how planets like the Earth are formed. Since all of the planets in our Solar System are already fully grown, they have to use powerful telescopes to look for baby planets around distant stars. Planets form in the discs of dust and dirt that surround young stars. But since this happens quickly, and because baby planets are tricky to spot, astronomers had not seen any before. ...

... Armagh Observatory, College Hill, Armagh BT61 9DG, +44 (0)28 3752 2928 . ... Aurora . ... Corona . Fireballs . ... Zodiacal Light . ... The first thing to do is get acquainted with what the night sky looks like. ... The National Schools Observatory web site has very good horizon views of the sky for the current night. ... If the object is moving slowly across the sky then it may be one of the larger satellites. ... Cloudbait Observatory - October 2002 . ... October 2003 Aurora at Armagh . ...

... What's New? Bad Astronomy . ... News . ... The questions was: "During a flight, I saw a round rainbow shaped like a doughnut. ... However, she said that all rainbows are actually circles, and that she could not find a name for this phenomenon. ... One is that rainbows really aren't full circles. ... Basically, rainbows are due to light getting bent ("refracted") inside of raindrops. ... It's called a "glory", and is formed in a somewhat different way than rainbows. ... 2008 Phil Plait. ...

... The Pleiades star cluster, also known as the Seven Sisters and Messier 45, is a conspicuous object in the night sky with a prominent place in ancient mythology . ... The stars in the Pleiades are thought to have formed together around 100 million years ago, making them 1/50th the age of our sun, and they lie some 130 parsecs (425 light years ) away. ... Data for these stars are listed in a table below. ... Yes . ... WEBDA Pleiades cluster data . ... M45: The Pleiades Star Cluster (2007 November 18) ...

home publications > mercury . ... Books . ... How Do Planets Form? ... Astronomers are looking for clues from our solar system and others to determine whether planets form easy and fast or hard and slow. by David A. Weintraub, Vanderbilt University . The recent discovery of at least 50 extrasolar giant planets is one of the most profound and exciting events in modern science. ... Being an impatient lot, astronomers don't want to wait for a decade or more until the technology becomes available. ...

Photon Scattering: Basic Principle of Photon Scattering . Audio Narration is available . No Scattering: Photon Source and Detector . ... For optical photons, scattering goes as wavelength to the -4 power. In the case of blue photons compared to red photons, this means that blue photons are about 10 times more likely to get scattered than red photons. ... Watch the blue photons scatter away from the detector . ... Interstellar dust make stars appear redder than they really are . ...

We present an initial look at the far-infrared-radio correlation within the star-forming disks of four nearby, nearly face-on galaxies (NGC 2403, NGC 3031, NGC 5194, and NGC 6946). ... The best-fit smoothing kernels for the two less active star-forming galaxies (NGC 2403 and NGC 3031) have much larger scale lengths than those of the more active star-forming galaxies (NGC 5194 and NGC 6946). ...

... Home Observing This Month?s Sky This MonthтАЩs Sky тАУ February 2016 . ... This MonthтАЩs Sky тАУ April 2016 . This MonthтАЩs Sky тАУ March 2016 . This MonthтАЩs Sky тАУ February 2016 . ... Beyond New York City . ... Observing Resources for Amateur Astronomers - Part 1: Beginning Observers . ... A History of the First Forty Years of the Amateur Astronomers Association . ... Amateur Astronomers Medal . ... 2016 Amateur Astronomers Association of New York Designed by Press Customizr Powered by . ...

... Tonight's Sky . ... Sky this Month . ... solar system . ... Sky this Week . ... Observe the Solar System . Astronomy for Kids . ... Tour the Solar System . ... Are astronomers still looking for "Planet X," a 10th planet in our solar system? ... For most of the 20th century, some astronomers were convinced that a 10th planet Planet X lay somewhere beyond Neptune. ... Get instant access to subscriber content on Astronomy.com! ... If you are already registered on Astronomy.com, please log in below. ...

... Looking south-east to the constellations of CтАж . ... Title: Looking south-east to the constellations of Centaurus and Scorpius behind the ANU 2.3m telescope building . ... Looking south-east to the constellations of Centaurus and Scorpius behind the ANU 2.3m telescope building NOTE: All images are copyright and must not be reproduced or mirrored in any form without written permission. ...

... 2000 April 24 . Reflection Nebula M78 . ... Explanation: An eerie blue glow and ominous columns of dark dust highlight M78, a bright reflection nebula in the constellation of Orion . The dust not only absorbs light, but also reflects the light of several bright blue stars that formed recently in the nebula. ... M78 belongs to the larger Orion Molecular Cloud Complex that contains the Great Nebula in Orion and the Horsehead Nebula . ... About APOD | ...

... Restrictions ) are used. If specified form of output is EMP then astrometric equatorial coordinates are printed in the form usual for Ephemerides of Minor Planets, with formal precision of 0.01 minute of time in R.A. and 0.1 minute of arc in declination. ... It should be noted that the near-opposition ephemerides are not calculated for bodies/ points with numbers from –12 to 0 (in case they are included into task for computation of such ephemerides only their names are displayed in the results). ...

... Dept. for Astrometry & Space Geodynamics . ... Dept. for Physics of Stars&Galaxies . ... Dept. for Physics of Planetary Systems . ... Science . ... All Pages . ... Research of the stars with planets which pass apparent star disk (transiting exoplanets). The transit method based on a detection star brightness decrease during a passing of planet in front of its disk. Observed brightness system decries when planet pass star disk and its volume depend of the relative sizes star and planet. ...

The lost world: Pluto and Haron. Pluto . ... Mass . ... The period of rotation . ... Pluto is the ninth from the Sun big planet of the solar system. ... The careful processing of the snapshots with the images of the star sky parts, where the new planet was thought to be found was not successful at that time (later on when Pluto had been discovered the snapshots of 1991 were processed again and there were the four very weak and invisible earlier imeges of the planet seen). ...

The Astronomy Shop . ... Shop | ... Cards | ... Sold in sets of 8 cards (two of each image) with envelopes in a Keepsake Wallet. ... Starbirth Clouds in M-16, Starbirth in the Trifid Nebula, Live Cycle of Stars in Galactic Nebula NGC 3603, and Inside the Lagoon Nebula. ... Majestic Spiral Galaxy NGC 4414, A Grazing Encounter of Two Spiral Galaxies, Infant Stars Ring Core of Galaxy NGC 4314, and Galactic Silhouettes. ... We have bulk pricing available. ... www.astronomy.net . About Astronomy Net | ...

... Words . ... Connections (constellation) . Connections (matrix) . Data Collection and Analysis . AAS 221 . ... The data below shows the most-popular words used in tweets about the 221st meeting of the American Astronmical Society . A number of common English words have been removed (including terms AAS221 , AAS and RT since they are very popular). ... The data collection has now stopped. ... Here we restrict ourselves to those tweets not flagged by Twitter as being a re-tweet. ...

National Aeronautics and Space Administration . ... Bruce McCandless II (Captain, USN, Ret.) NASA Astronaut (former) . ... He was a member of the astronaut support crew for the Apollo 14 mission and was backup pilot for the first manned Skylab mission (SL-1/SL-2). ... A veteran of two space flights, McCandless has logged over 312 hours in space, including 4 hours of MMU flight time. ... With the completion of this flight McCandless logged 191 hours in space (including 4 hours of MMU flight time). ...