... This common question frequently precedes the rediscovery of one of the most commonly recognized configurations of stars on the northern sky: the Big Dipper. This grouping of stars is one of the few things that has likely been seen, and will be seen, by every generation. ... Adrift 1,500 light-years away in one of the night sky's most recognizable constellations, the glowing Orion Nebula and the dark Horsehead Nebula are contrasting cosmic vistas. ... Light from the First Stars . ... 31.12.2006 . ...

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... 2009 August 1 . SN 1006 Supernova Remnant . Image Credit: NASA , ESA , Zolt Levay ( STScI ) . Explanation: A new star, likely the brightest supernova in recorded human history, lit up planet Earth's sky in the year 1006 AD. ... Now known as the SN 1006 supernova remnant , the debris cloud appears to be about 60 light-years across and is understood to represent the remains of a white dwarf star. ... About APOD | ... NASA Official: Phillip Newman Specific rights apply . ...

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• APOD: 2015 December 21 - SN Refsdal: The First Predicted Supernova Image
• APOD: 2005 December 6 - The Veil Nebula Unveiled
• APOD: 2015 August 19 - Central Cygnus Skyscape

Supernova 1999gs in NGC 4725 . This is a prediscovery image of 1999gs in NGC 4725 taken by Marco Migliardi on December 23.21 1999, during the CROSS Program with the Col DrusciХ 20" "Helmut Ullrich" telescope. This image was taken 5 days before the "discovery" image of 1999gs which was taken by LOSS this image shows a significantly brighter SN than the discovery image shows. ... Back to Bright Supernovae . Back to Bright Supernovae - 1999 . ...

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• Supernova 2003L in NGC 3506
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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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• Astronomy HyperText Book: Interstellar Medium

... 2000 August 18 . X-Rays From Antennae Galaxies . ... CXC , SAO , NASA . Explanation: A bevy of black holes and neutron stars shine as bright, point-like sources against bubbles of million degree gas in this false-color x-ray image from the orbiting Chandra Observatory . ... The exploding stars litter the scene with bubbles of shocked hot gas and collapsed stellar cores . ... Tomorrow's picture: X-ray Sky . ... About APOD | ... NASA Technical Rep.: ... A service of: LHEA at NASA / GSFC . ...

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• APOD: December 30, 1998 - Supernova 1994D and the Unexpected Universe
• APOD: August 7, 1998 - M65 Without Moth
• APOD: 2000 August 4 - M15: Dense Globular Star Cluster

... 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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• Common Holidays in Relation to Equinoxes, Solstices Cross-Quarter Days
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• radar

... Articles | ... Forums . ... 230 deg . 49 deg . ... 130 deg . ... More Info . ... 210 deg . ... 168 deg . ... 249 deg . ... 195 deg . ... 271 deg . ... 110 deg . ... 338 deg . ... July 15 . 247 deg . ... 224 deg . ... 340 deg . ... July Phoenicids (PHE) . ... August 10 . 341 deg . ... 339 deg . ... 307 deg . ... 334 deg . ... 335 deg . ... 286 deg . ... 327 deg . ... 262 deg . ... 102 deg . ... 153 deg . ... 117 deg . ... December 2 . ... 123 deg . ... 100 deg . ... www.astronomy.net . ...

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• Off Topic: Looking For Help With Optical Device-like A Borescope - an Astronomy
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• ATM Discussion Forum - Hosted by The Astronomy Net

... This spectacular new photograph of space contains so many bright shining stars it looks like someone spilt a pot of glitter over it! ... On the left is a very bright star cluster called NGC 3603. This cluster is famous within our Galaxy for having the highest concentration of massive stars of any star cluster! ... While Wolf-Rayet stars are thought to be fairly common across the Universe, they live such short lives we rarely stumble across them. ...

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• http://www.eso.org/public/news/eso1231/kids/
• http://www.eso.org/public/news/eso1337/kids/
• http://www.eso.org/public/news/eso1131/kids/

... The expansion is measured as a number called the Hubble Constant . ... Our value is about 20% lower than the one got with the Hubble Space Telescope in 1994," said Dr Jim Lovell, leader of the team that made the measurement. The Hubble Constant is named after American astronomer Edwin Hubble, who in the 1920s found that other galaxies were moving away from ours. ... The Hubble Constant links the galaxy's distance with its speed." ... A short run-down on the Hubble Constant: . ...

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... Moon . ... December . ... If you would like to see the conjunction of the Moon and Venus make sure you are looking east, just before sunrise on 7th December. ... The New Moon will be in the sky on the 11th of December, so this will be the perfect time to try and see more of the wonderful celestial objects in the night sky. ... Orion is one of the most famous constellations in the night sky. ... The month of December also boasts what is considered one of the best meteor showers to grace the heavens. ...

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• Stellar Nursery NGC 6357: Image of the Month | Astronotes
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• classical mythology | Astronotes

... Parameter Mand Type Default Constraints siamset yes string /data/cerd/ CCF /ccfdev/packages/xmm- siam /XMM BORESIGHT for siam .matrix0005. CCF DataSet containing the SIAM angles in BoreSight CCF format. (see comments) ry yes oat 0 3600{3600 shift of source in the FOV of the instrument corresponding to a rotation of the space-craft around the Y-axis in arcsec rz yes oat 0 3600{3600 shift of source in the FOV of the ... SIAM matrix, but formatted as a BoreSight constituent. ...

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• How to extract MOS spectra of a point-like source and associated matrices
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... Armagh Observatory, College Hill, Armagh BT61 9DG, +44 (0)28 3752 2928 . ... News Feed . ... 2010 December 21st . ... Coldest November Since 1985 . 2010 December 1st . ... Armagh Observatory and Armagh Rhymers OASES Out-of-this-World Experience at the Planetarium . ... 2010 November 1st . Armagh Observatory 2010 Robinson Lecture . ... 2010 October 4th . ... 2010 August 4th . ... Wet July . ... 2010 July 1st . ... Armagh Observatory Business Plan 2010/2011 . ... 4th MiMeS Workshop, July 2010 . ...

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• Terry Mosely's Bulletins
• Armagh Observatory
• Terry Mosely Astronomy Bulletins

... Tonight's Sky . ... The Magazine . ... Observing . ... Magazine . ... Gravitational wave search provides insights into galaxy evolution and mergers . ... The double star 54 Leonis, spiral galaxy NGC 3198, and emission nebula NGC 3199 . ... Astronomy for Kids . ... Neptune glows at its brightest . ... 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 Magazine . ...

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• Jupiter brightens the December sky | Astronomy.com
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• Bright planets meet at dusk | Astronomy.com

Check out the new images (Jan 18-25) and (Jan 26-Feb 05) of the comet by Rob McNaught. ... Every few years a comet becomes bright enough to be easily seen with the naked eye but only every decade or so are these comparable with comets like Halley. ... Before Jan 13, the comet is not visible in the Australian sky after sunset. ... SOHO images . ... On Jan 12 at approximately 09:00 UT (8pm NSW time), comet C/2006 P1 McNaught appears at the 11 o'clock position in the images. ... STEREO images . ...

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• The Music of the Spheres
• Emma Kirby
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... 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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• STScI Preprint #1204
• HST this week: 233
• HST this week: 220

... Bad Astronomy . ... Bitesize Astronomy . ... Keep Bad Astronomy close to your heart, and help make me filthy rich. ... It's semi-common knowledge that stars twinkle and planets don't. By semi-common, I mean that a lot of folks know that, but I also mean it isn't strictly true. Stars twinkle because we see them from the bottom of a sea of air. ... These small bundles of air act like little lenses, bending light as it passes through them. ... What we see is the light from the star flickering. ...

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• Phil Plait's Bad Astronomy: Misconceptions
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. Album : asv-album :: Travels to distant places and countries :: 1997/08 Kyoto, Nara (Japan) :: 21/08 Toji temple flea market, Gion district . Up . << Prev . Toji temple, central building. On August 21, the huge flea market teems on the temple territory. Next >> . Photo album generated by album a MarginalHack by Dave Madison on Tue Jun 23 14:46:14 2015 .

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• Image: Looks like we're the last
• Image: A bug; just like in Russia! I've seen it many times!
• Day Seven. Ryoanji Temple and around

The "ring of fire" seen by satellite cameras around the polar caps (picture below) is probably created by electrons leaking from the tail's plasma sheet, whose magnetic field lines form a somewhat imperfect trap. ... One possible explanation involves the close association between auroral arcs and electric currents which flow along field lines between the ionosphere and distant space ( Birkeland currents ). ... That produces an extra resistance to the flow of current. ...

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• Field-aligned potential drops [Oulu]
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... The Sun . Does anyone know how many stars are there in the solar system? Come take a look at the Sun. See that? ... Did you know all the stars you see when you look up are inside our galaxy! ... Did you know that our Sun and solar system were born in a cloud of gas and dust like this. ... We're looking at a place where stars are being born. ... Sharing the Universe is based upon work supported by the Informal Education Division of the National Science Foundation under Grant no DRL-0638873. ...

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• ASP: SETI?s Prospects Are Bright
• ASP: Contents, July/August 1996
• ASP: December's Total Lunar Eclipse

... Aurora from Space . ... Magnetic Storms . ... The "ring of fire" seen by satellite cameras around the polar caps (picture below) is probably created by electrons leaking from the tail's plasma sheet, whose magnetic field lines form a somewhat imperfect trap. ... One possible explanation involves the close association between auroral arcs and electric currents which flow along field lines between the ionosphere and distant space ( Birkeland currents ). ... Why no aurora at the magnetic poles? ...

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• Electric Currents from Space
• Solar Energetic Particles
• The Polar Aurora