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  Summary: Comet 17P/Holmes shocked astronomers on Oct. 24, 2007, with a spectacular eruption. In less than 24 hours, the 17th magnitude comet brightened by a factor of nearly a million, becoming a naked-eye object in the evening sky. By mid-November the expanding comet was the largest object in the solar system--bigger even than the Sun. Since then, the comet has faded back to invisibility. A leading model of the blast posits a deep cavern of ice changing phase, from amorphous to crystalline, releasing in transition enough heat to cause Holmes to blow its top. The comet probably contains many such caverns so, one day, it could happen again. [ephemeris] [3D orbit]
  Photographer, Location Images Comments

Mike Holloway,
Van Buren, Arkansas
Jan. 3, 2008
#1, more

This is a huge mosaic taken 2008/01/03 UT. It contains 6 different images each containing 5 minutes of information and then stitched together. I have left it full size which makes it a big image. Wanted those interest to see what else is there looking through and around the comet . I have named a few objects with magnitudes and thee are lots of little "whatevers" out there. This is for exploring.

Jimmy Westlake,
Stagecoach, Colorado, USA
Jan. 1, 2008
#1, more

This series of Comet 17P/Holmes images dramatically demonstrates its evolution since the outburst of October 24, 2007. All were taken with a 300 mm Nikkor lens on a Fuji FinePix S2 digital camera and reproduced here to the same scale. The inset image of the Moon at upper right is also reproduced to the same scale and represents approximately 30 arc minutes, or 1/2º.

Chris Schur,
Payson, Az
Dec. 26, 2007

Here is the latest VERY deep exposure of Comet Holmes from last night. The comet is still very easy to see naked eye, and is growing more gigantic every day. You can see the comet is still an amazing sight in this image.

Sebastian Voltmer,
La Rosière, France
Dec. 19, 2007
#1, #2, more

Object: Comet Holmes Location: La Rosière (near Mont Blanc), France Camera: EOS 30D Optic: 30mm / 160mm Tracking: AstroTrac

Andrea Aletti,
Campo dei Fiori Mount 1226 m slm (VA) Italy
Dec. 24, 2007
#1, more

Comet 17P in a Full moon night.

Stefan Seip,
Countryside near the Observatory Welzheim (near Stuttgart), Germany
Dec. 19, 2007
#1, more

Hello, here is a shot from last night. Boy what a bitterly cold night in Germany! ... brrrr .... The image shows the whole Winter Hexagon as well as the comet 17P/Holmes. But very prominent inside the Hexagon is Mars. Date: December 19th, 2007 Time: 4:51 UT Location: Countryside near the Observatory Welzheim (near Stuttgart) Camera: Canon EOS 1Ds Mark II digital single lens reflex camera Lens: Canon 15mm F/2.8 fisheye lens at F/3.5 Filter: Softener (slight) ISO: 1000 Flash: Remote flash in the hand of the person to the right (to illuminate the tree)! Exposure time: 1 minute (tracking the stars!) Processing: Little correction of the distortions, cropping, slight enhancement of contrast and little adjustments of color balance

Gunnar Glitscher,
Darmstadt, Germany
Dec. 15, 2007
#1, #2, more

Christmas Comet Holmes hovering over Johannes church, Darmstadt, Germany (2x8 seconds, ISO 800, F = 50 mm). The same December evening the International Space Station crossed the skies (second foto, bright streak). The faint track of a second satellite is visible just to the left of steepletop (6 seconds, ISO 800, F = 50 mm). As we know there's no Merry Christmas on the ISS this year because of the sudden death of one astronaut's mother. When we look at the station in the nights ahead, we should keep in mind the hard working crew members and that they do it for all of us. A happy New Year to and all readers! Clear Skies, Gunnar Glitscher

Hiroaki Ohno,
Japan Fukushima city
Dec. 27, 2007
#1, more

Des.27.2007 19:25 JST 90mm refractor focus 500mm Canon EOS-40D (SEO-SP2) ISO 1000 120 secondes moon: Nov.2007

Hanno Falk,
Dec. 31, 2007

Yesterday the sky was clear, but I did not have enough time for adjustments and long exposure series, because I was invited. So just two quick shots before I had to leave. A happy New Year and clear skies, Hanno.

Gregg Ruppel,
Ellisville, MO USA
Dec. 25, 2007
#1, #2, #3, more

Comet Holmes continues to expand and is faintly visible to the naked eye.

more images (Jan. 1, 2008): from Günther Strauch of Borken, NRW, Germany; from Mike Prokosch of Sam Houston State Observatory, Huntsville, Texas

more images (Dec 30-31, 2007): from Paul Gaylord of Little Blair Valley, San Diego, Ca; from Ugur Ikizler of Mudanya - Bursa / Turkey; from Michael Borman of Evansville, Indiana; from Mike Salway of Central Coast, NSW Australia;

more images (Dec. 28-29, 2007): from Helmut Groell of Moers, Germany; from Rob Kaufman of Bright, Victoria, Australia

more images (Dec. 25-27, 2007): from R.T. Smith of Stoneville, NC; from Martin Mc Kenna of Maghera, Co. Derry, N. Ireland