... 2012 February 29 . Moon and Planets Over Catalonia . ... Explanation: Venus and Jupiter will appear unusually close in the sky over the next month. ... In the above image composite taken late last week from Catalonia , Spain , a bright crescent moon appears to the right of Venus, while Jupiter appears near the top of the image. ... A gallery of conjunction images is visible on the Asterisk -- APOD's discussion board. ... The next Jupiter-Venus conjunction will occur in May 2013. ... About APOD | ...

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• APOD: March 8, 1999 - A Jupiter Venus Conjunction
• APOD: 2002 October 2 - Star Clouds Toward the Southern Crown
• APOD: 2006 March 6 - Unexpected Comet Pojmanski Now Visible

... 12.03.1996 . ... Probably some of these comets did not get as bright as Comet Hyakutake ("hyah-koo-tah-kay") will in the next two weeks. ... During its closest approach to the Earth on March 25th, Comet Hyakutake will appear in the Northern hemisphere as a diffuse ball of light brighter than most stars. ... As Comet Hyakutake recedes from the Earth it will fade, but brighten again as it nears the sun later in April. ... There is no chance Comet Hyakutake will hit the Earth. ... Little Planet Lovejoy...

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• Star Clouds Toward the Southern Crown
• Астронет > Here Comes Comet Hyakutake
• Journal "Peremennye Zvezdy"

... Bad Astronomy . ... Bitesize Astronomy . ... Last week's Snack talked about how black holes can affect the environment around them in such a way as to be very bright . ... It's a common misconception that black holes always have matter swirling into them. ... As this matter gets closer and closer to the black hole it piles up and a large, fairly flat disk forms. This is called the accretion disk , because matter from this disk accretes (that is, falls in) on the black hole. ... 2008 Phil Plait. ...

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The red colors in this image show the galaxy M66 as it appears at the submillimeter wavelength of 850 microns, while the white background shows the galaxy as it appears in visible light. Regions of cold dust that appear as dark streaks in the white image glow brightly in the red image. ...

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• Bright planets meet at dusk | Astronomy.com

Next: Basic Properties Up: R Coronae Borealis Stars Previous: Introduction . RCB stars are named after a star just visible to the naked eye in the constellation of Corona Borealis. RCrB was discovered by Edward Pigott, an English amateur astronomer, who had been observing a star in the `Northern Crown' for over a decade. ... Since 1795, other RCB stars have been discovered and their properties have been carefully observed. ...

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• HISTORICAL BACKGROUND
• Armagh Observatory
• May 2002 Planetary Alignment

Discover the cosmos! ... December 6, 1999 . M83: The Southern Pinwheel Galaxy from VLT . ... Explanation: M83 is one of the closest and brightest spiral galaxies on the sky. Visible with binoculars in the constellation of Hydra , majestic spiral arms have prompted its nickname as the Southern Pinwheel. Although discovered 250 years ago, only in this century was it appreciated that M83 was not a gas cloud but a barred spiral galaxy much like our own Milky Way Galaxy . ... About APOD > . ...

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• Astronomy Picture of the Day
• APOD: May 1, 1996 - Comet Hyakutake and a Cactus
• Comet Introduction

... Comet Animation . ... Comet structures are diverse and very dynamic, but they all develop a surrounding cloud of diffuse material, called a coma, that usually grows in size and brightness as the comet approaches the Sun. ... As comets approach the Sun they develop enormous tails of luminous material that extend for millions of kilometers from the head, away from the Sun. ... The evaporated molecules boil off and carry small solid particles with them, forming the comet's coma of gas and dust. ...

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• First X-Rays From a Comet Discovered
• The Sun's Corona

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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• Siding Spring Survey
• Pink Black Holes: Frequently Asked Questions
• VV29 = Arp 188 = The Chainsaw Galaxy

Astronotes Armagh Planetarium's Stellar Blog! ... By admin March 6, 2013 Posted in: Comets and Asteroids . ... Comet PANSTARRS reaches perihelion, its closest approach to the Sun on 10 March, after this it will start to move away from the Sun and to be visible in the twilight sky to observers in the northern hemisphere. ... It was a very faint and delicate white ?feather? against a deep golden sky.€а It took quite some effort to find even with binoculars and I could not see it at all without them. ...

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• Leonid meteors 2011 | Astronotes
• Stellar Nursery NGC 6357: Image of the Month | Astronotes
• The Leonid meteors: highlights of the November night sky | Astronotes

... Its perihelion would occur on April 1, 1997, at which point the comet would be only 0.92 astronomical units from the Sun, just within the orbit of Earth. ... Taken in April 1993, the photo showed the comet over 13 astronomical units from the Sun, well beyond the orbit of Saturn. ... Hale, as in Comet Hale-Bopp, has written a book, Everybody's Comet (available through the ASP Catalog) and coordinated an Internet project, "Hale-Bopp: Live in the American Classroom." ... Anatomy of a comet. ...

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• ASP: Shadow Play: 1998's Total Solar Eclipse
• ASP: Why Should We Care About Exploding Stars?
• ASP: The Return of Halley's Comet

... self-absorption - the absorption of light shining on an object by a process similar to that which produced the light originally; if a cloud emits less light than it absorbs from other clouds behind it, this net loss of light, termed self-absorption , causes the foreground cloud to appear darker than the background field (the term is from spectroscopy, where small absorption dips sometimes occur in larger emission lines, making the latter look as if it is absorbing part of itself) . ... HISA Main ...

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• HISA Poster for the 33rd Annual Meeting of CASCA, May, 2002
• The Pleiades
• HISA Poster for the 195th Meeting of the AAS, January, 2000

... The Russian TESIS/ CORONAS-PHOTON Solar Observatory, which has been working in orbit since January 30th, 2009, has photographed one of the most important events in the build up to the upcoming solar cycle - the formation of our star's new southern belt of activity. The first magnetic fields of the new cycle in the southern hemisphere appeared on the Sun's surface on May 23-24th. ... The belt of activity is one of the primary concepts, characterizing the solar cycle. ...