... 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....

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... Happy People Dancing on Planet Earth . ... Many humans on Earth exhibit periods of happiness, and one method of displaying happiness is dancing. ... The Tidal Tail of NGC 3628 . ... A mere 30 million light-years away, large spiral galaxy NGC 3628 (center left) shares its neighborhood in the local Universe with two other large spirals, in a magnificent grouping otherwise known as the Leo Triplet. NGC 4565: Galaxy on Edge . ... Magnificent spiral galaxy NGC 4565 is viewed edge-on from planet Earth. ...

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... 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. ...

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• Objects in the Sky
• May 2002 Planetary Alignment
• Spectacular Planetary Alignment to Brighten up the New Year's Eve Skies |

... 2012 July 11 . A Morning Line of Stars and Planets . ... Explanation: Early morning dog walkers got a visual treat last week as bright stars and planets appeared to line up. ... Jupiter and Venus will continue to dazzle pre-dawn strollers all over planet Earth for the rest of the month, although even now the morning planets are seen projected away from the line connecting their distant stellar sky mates . ... About APOD | ... NASA Official: Phillip Newman Specific rights apply . ...

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• APOD: 2015 May 14 - Dwarf Planet, Bright Spot
• APOD: 2002 June 20 - Bright Galaxy M81
• APOD: 2008 September 30 - Planets Ahoy

Moon, Planets And Aurora, Oh My! Articles | ... Moon | ... How often do we see several planets and the Moon together? ... Then I look northeast and see more red through all the light pollution of Washington, D.C. I snapped this 15 second photo. ... What started out as a father son photographic safari for rare planet conjunctions turned into a spectacular night of memories. ... Aha, I see some red light near Orion. ... A Very Rare Red Aurora in Northern Virginia, . ... www.astronomy.net . ...

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• Finding Himalia, The Fifth Brightest Moon Of Jupiter - an Astronomy Net Article
• You Can Make Stellar Images Brighter - an Astronomy Net Article
• Stars And Planets In Greece (?) - an Astronomy Net Education Forum Message

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. ...

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• The Planet, the Galaxy and the Laser | ESO
• Planet Found in Nearest Star System to Earth | ESO
• Mario van den Ancker

... 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. ...

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• ESO finds weird doomed planet from another galaxy | Astronotes
• Wonders of the February Night Sky | Astronotes
• Wonders of the December Sky | Astronotes

... Bad Astronomy . ... Bitesize Astronomy . ... Bad Astro Store . ... The Nine Planets . ... Slacker Astronomy . ... Keep Bad Astronomy close to your heart, and help make me filthy rich. ... Quick: how many planets can you see with the unaided eye? ... Oddly, it had actually been seen many times before, but astronomers assumed it was a star! ... The Nine Planets is loaded with info. ... 2008 Phil Plait. ... Subscribe to the Bad Astronomy Newsletter! Talk about Bad Astronomy on the BA Bulletin Board! ...

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• Phil Plait's Bad Astronomy: Bitesize Astronomy
• Phil Plait's Bad Astronomy: Misconceptions
• Phil Plait's Bad Astronomy: Mad Science

... Invisible airwaves crackle with life Bright antenna bristle with the energy Emotional feedback on timeless wavelength Bearing a gift beyond price, almost free All this machinery making modern music Can still be open-hearted. ... You can choose a ready guide in some celestial voice. ... SONG: Different Strings Who's come to slay the dragon, Come to watch him fall? ... Tide Pools When the ebbing tide retreats Along the rocky shoreline, It leaves a trail of tidal pools In a short-lived galaxy. ...

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In this gallery are many images of Low Surface Brightness Galaxies which have recently been discovered and analyzed. ... The central surface brightness of this galaxy is 24.28 . Malin 2 This galaxy is another huge disk galaxy with a scale length of 15 kpc and a redshift of 15000 km/a. The high surface brightness knot in one of its spiral arms actually has the same color, luminosity and H-alpha equivalent width as the entire Large Magellanic Cloud . ... Truly it is a Low Surface Brightness Galaxy. ...

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• Orbital Properties of the Solar System
• Astronomy Plus CCD Images of Galaxies
• The Three Planet System

... Planets and Brown Dwarfs . ... Mission Definition . Ask anyone on the street to give an example of a planet, and they'll consider you a bit dim. ... Finally, if you ask "What is the exact scientific definition of 'planet'?", it turns out that nobody can answer it, because there really isn't one. ... The word itself means "wanderer" in Greek, and other cultures generally have words for "planet" with a similar meaning. So why isn't that good enough for us today? ...

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• ASP: Probing Extrasolar Planets with the Spitzer Space Telescope
• ASP: What Have We Learned About Halley's Comet?
• ASP: Exploring Invisible Skies

Microsymposium 38, MS083, 2003 (A4 format) MERCURY: LOCAL VARIATIONS OF THE PHOTOMETRIC RELIEF. ... Because of trajectory and pointing angle constraints the planet could be observed from Mariner 10 only over a small range of phase angles between about 75o and 110o. Therefore the photometric investigations are restricted to measuring the distribution of brightness on the Mercurian disk. ... Raw versions of real-time processing pictures FDS 0000984 and FDS 0000986 were used (images 196 and 202). ...

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... STScI-PRC99-27 A CLOSER ENCOUNTER WITH MARS Taking advantage of Mars's closest approach to Earth in eight years, astronomers using NASA's Hubble Space Telescope have taken the space-based observatory's sharpest views yet of the Red Planet. ... In these views the north polar cap is tilted toward the Earth and is visible prominently at the top of each picture. ... Dark sand dunes that surround the polar cap merge into a large, dark region called Acidalia. ...

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• APOD: March 25, 1999 - March of the Planets
• New Moons of Uranus
• Venus

The Bringer of Peace V enus is the second planet from the Sun and the sixth largest. ... S ince Venus is an inferior planet, it shows phases when viewed with a telescope from the perspective of Earth. ... T he pressure of Venus' atmosphere at the surface is 90 atmospheres (about the same as the pressure at a depth of 1 km in Earth's oceans). ... Craters on Venus seem to come in bunches indicating that large meteoriods that do reach the surface usually break up in the atmosphere. ... Earth .. ...

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• Appendices to The Nine Planets
• Solar System Extrema
• Seeing the Solar System

... Kepler is a mission designed to detect and characterize Earth-sized planets around solar-like stars. The sizes of the planets are determined from the decrease in light from a star that occurs during planetary transits, and the orbital period is determined from the repeatability of the transits. ... These goals are accomplished by continuously and simultaneously monitoring a single field of 140,000 stars for evidence of brightness changes caused by transits of Earth-sized or larger planets. ...

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• http://www.stsci.edu/~pmcc/TESS/TESS_AAS_2014_factsheet.pdf
• XO Project
• Planets Beyond the Solar System

The Universe of Planet Ziggy Assignments 4, 5 and 6 for ASTR1002. ... The USS Drongo · You are the crew of the Starship USS Drongo. ... On arriving in this universe, you were forced to crash land on the first planet you found. You call this planet "Ziggy" Planet Ziggy The USS Drongo Crash Landed Here. ... It has been dark at the crash site for all those 120 hours - you haven't seen Ziggy's sun (you know it has one - a fairly normal G-type star, because you saw it on the way down). ...

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• ASTR1002 Assignments 4-6: Planet Ziggy
• Michele Bannister - Research
• University Problem Based Learning Exercises for Teaching Astronomy and Physics

... This glossary is not meant to be an exhaustive list of techno-definitions. ... Is there a term you don't see here? ... Do you know how to pronounce the CONSTELLATIONS , STARS , or the PLANETS and their MOONS ? ... First Law - the orbit of each planet is an ellipse with the sun at a focus . ... LIGHT BUCKET: A common slang term for a large apertures . ... LIGHT POLLUTION: The illumination of the night sky caused by artificial light sources on the ground (streetlights, billboards, etc.) ...

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• Astronomical Glossary - S - Z
• Astronomical Glossary - N thru R
• Astronomical Glossary - G thru I

... 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) ...

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• Planetary Radar: Arecibo Radar Images of Planets
• Extra-solar planets
• Why can I only see six of the ``Seven Sisters''?

NAUTICAL ASTRONOMICAL YEARBOOK for 2016 (in Russian) . Foreword . ... NAY) is the daily visual geocentrical equatorial ephemerides of brightest navigational stars ? the Sun, the Moon, four major planets (Venus, Mars, Jupiter, Saturn) and of the 69 brightest stars, and the time of the rising and setting of the Sun and the Moon, the time of the beginning and the end of civil and navigational twilights, the azimuths of the upper limb of the Sun on rising and setting. ...

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• NAY 2017 (Foreword)
• NAY 2012 (Foreword)
• NAY 2015 (Foreword)

Bright Supernova - Archives On these pages you will find references to Supernovae which have faded into oblivion. ... Finally, in 1999, when I took over the International Supernova Network's Latest Supernovae page I retitled the main page "Latest Supernovae", BUT, it's the "Latest Supernovae" page of the "Bright Supernovae" pages which are also sub-pages of ISN. ... Brightest supernova in 2005 . ... Brightest supernova in 2002 . ... Brightest supernova in 2000 . ... Brightest supernova in 1999 . ...

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• Supernova 2001cj in UGC 8399
• Bright Supernova Bright Supernova
• Supernova 2007sr in NGC 4038