“Don't wake me for the end of the world unless it has very good special effects.” -Roger Zelazny
It's always the ones you least expect that get you the worst, it seems. I went to bed last night excited that Asteroid 2012 DA14, a 200,000 ton asteroid, was going to pass within just 28,000 km (or 17,000 miles) of Earth's surface, which would make it the closest pass of an asteroid that large that we've ever observed.
Almost seven days on the train, covering a distance of 9,300 km (5,772 miles) with 145 stops - the longest railway in the world runs literally through the whole of Russia. During the journey, passengers get to see endless forests, several mountain ranges, mighty rivers, and even Lake Baikal. But let's start at the beginning.
3) Irons and stony irons are fragments of the cores of fully-formed small planets that were disrupted during collisions billions of years ago. As the first planets grew in size, heavy elements such as nickel and iron sank to their centers to form metallic cores, like that of the Earth.
Generally speaking, meteorites are named after the place where they fell or were found. That’s why the iron meteorite that made the Arizona Meteor Crater is called Canyon Diablo and that which exploded over Russia in 1947 is known as Sikhote-Alin.
A 1.7kg individual meteorite from the Sikhote Alin meteorite shower (coasrsest octahedrite, class IIAB). This specimen is about 12cm wide. Sikhote Alin meteorite shower fell on 1947 February 12 in the dense forest of eastern Siberia, and over 23 tons of meteoritic material has been recovered. (H. Raab /
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