Images Dated 20th September 2002
Available as Framed Prints, Photos, Wall Art and Gift Items
Choose from 15 pictures in our Images Dated 20th September 2002 collection for your Wall Art or Photo Gift. Popular choices include Framed Prints, Canvas Prints, Posters and Jigsaw Puzzles. All professionally made for quick delivery.
Abstract
Aerial
Africa
Animals
Architecture
Arts
Asia
Europe
Historic
Humour
Maps and Charts
North America
Oceania
People
Popular Themes
Posters
Religion
Science
Services
South America
Special Days
Sport
Transportation
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Cosmic rays
Cosmic rays. A rain of energetic photons, protons & other atomic nuclei reaches Earth from space. These primary cosmic rays collide with atoms in the atmosphere to give showers of other particles: protons (p), neutrons (n), light nuclei (N), neutrinos (v), pions (pi) & muons (mu). Muons and neutrinos can reach far underground. Cosmic ray research began when Wulf went up the Eiffel Tower. Hess proved their cosmic origin. Cosmic rays were observed on the Pic du Midi in France & Pikes Peak in the US. Kolhorster reached 9000m & unmanned balloons 30, 000m. Today cosmic rays are detected undergound at Super-Kamiokande in Japan and underwater by Antares in the Mediterranean
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