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Images Dated 7th November 2007

Available as Framed Photos, Photos, Wall Art and Gift Items

Choose from 286 pictures in our Images Dated 7th November 2007 collection for your Wall Art or Photo Gift. Popular choices include Framed Photos, Canvas Prints, Posters and Jigsaw Puzzles. All professionally made for quick delivery.

Cygnus Loop Supernova Blast Wave Featured 7 Nov 2007 Print

Cygnus Loop Supernova Blast Wave

This is an image of a small portion of the Cygnus Loop supernova remnant, which marks the edge of a bubble-like, expanding blast wave from a colossal stellar explosion, occurring about 15, 000 years ago. The HST image shows the structure behind the shock waves, allowing astronomers for the first time to directly compare the actual structure of the shock with theoretical model calculations. Besides supernova remnants, these shock models are important in understanding a wide range of astrophysical phenomena, from winds in newly-formed stars to cataclysmic stellar outbursts. The supernova blast is slamming into tenuous clouds of insterstellar gas. This collision heats and compresses the gas, causing it to glow. The shock thus acts as a searchlight revealing the structure of the interstellar medium. The detailed HST image shows the blast wave overrunning dense clumps of gas, which despite HST's high resolution, cannot be resolved. This means that the clumps of gas must be small enough to fit inside our solar system, making them relatively small structures by interstellar standards. A bluish ribbon of light stretching left to right across the picture might be a knot of gas ejected by the supernova; this interstellar "bullet" traveling over three million miles per hour (5 million kilometres) is just catching up with the shock front, which has slowed down by ploughing into interstellar material. The Cygnus Loop appears as a faint ring of glowing gases about three degrees across (six times the diameter of the full Moon), located in the northern constellation, Cygnus the Swan. The supernova remnant is within the plane of our Milky Way galaxy and is 2, 600 light-years away. The photo is a combination of separate images taken in three colors, oxygen atoms (blue) emit light at temperatures of 30, 000 to 60, 000 degrees Celsius (50, 000 to 100, 000 degrees Farenheit). Hydrogen atoms (green) arise throughout the region of shocked gas. Sulfur atoms (red) form when the gas cools to around 10, 000 degrees Celsius (18, 000 degrees Farenheit)


The Great Blue Boar Featured 7 Nov 2007 Print

The Great Blue Boar

A cartoon from The Weekly Show-up or Political, Satirical & General Humourist, 21st July 1832. A man marches through London with an effigy, blaming the recent cholera epidemic on immigrants from India. Meanwhile, in the background, a quack sells medicine to gullible passers-by. (Photo by Hulton Archive/Getty Images)

© 2007 Getty Images

WORLD WAR I: CARTOON, 1915. The Devil: Magnificent! You Have Never Carried out Featured 7 Nov 2007 Print

WORLD WAR I: CARTOON, 1915. The Devil: Magnificent! You Have Never Carried out

The Devil: "Magnificent! You Have Never Carried out One of My Ideas More Thoroughly." American cartoon, 1915, by Boardman Robinson

© none

1915, Allegory, America, American, Boardman, Cartoon, Death, Destruction, Early, Evil, Grim Reaper, Pacifist, Personification, Politics, Robinson, Rubble, Satan, Skull, Symbol, World War I