The Tunguska event of 1908

I still remember the birch trees. Two million of them – they were the main view from the train, interrupted by small villages of wooden houses. Closer to Moscow those houses had been colourful but here in Siberia, paint seemed to be a rarity and the houses looked weathered. We finally left the train at…

Saving the Earth with asteroids

A republication of an older post The dinosaurs would disagree. After owning the Earth, they were now in a bit of a bother. A major re-arrangement of the Earth had taken place. Pangea had split; Gondwana was broken up. The Indian ocean had formed but not in a clean way: a number of parallel rifts…

Vesta’s volcanoes: Dawn’s blast in the past

This is the second instalment of the Dawn space trilogy. If you haven’t seen the first part yet, you may want to read that first. The region was known to be peculiar. The ground around the German town of Nordlingen contained strange rocks – the houses were build from them. Geologists had decided that it…

Dawn over Ceres: the journey

There used to be a missing planet. It had long been realized that there was an empty gap in the Solar System, between Mars and Jupiter. The two were just too far apart. The distribution of the planets was described well by a relation proposed by Johann Titius and Johann Bode, and this relation predicted…

Saving the Earth with asteroids

The dinosaurs would disagree. After owning the Earth, they were now in a bit of a bother. A major re-arrangement of the Earth had taken place. Pangea had split; Gondwana was broken up. The Indian ocean had formed but not in a clean way: a number of parallel rifts were running through Africa, and the…