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A ‘Big Bang’ in Earth’s Orbital Space

Where: Orbital Space around EarthFebruary 15, 2009 : An American and a Russian satellite collided over Siberia, Russia, on February 10, 2009. Five days after the event, there were reports that burning fragments of the wreckage were spotted over several American cities. The American satellite, Iridium 33, was a civilian communications satellite launched in 1997, and the Russian...

What does a Train Whistle tell us about the Universe?

What does a Train Whistle tell us about the Universe?
I remember my first visit to the railway station as a child of five. The excitement of the approaching train was an experience I have never quite forgotten. At first I heard a train whistle far away, low and distant. As the train got closer, the sound of the whistle not only increased, it became shriller, and difficult to...

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