Are we Stardust ?

Dear Michael, All the big stars, i.e. those with a mass exceeding the sun’s mass by a factor of 1.3, gain most of their energy by a hydrogen-fusion reaction that involves a catalytic cycle, known as the Bethe-Weizsäcker or CNO-cycle. During this reaction cycle, protons (i.e. hydrogen nuclei) are added four times into a cycling reaction that converts carbon through… (more…)


Today it is 1967, May 19th, and its my 6th birthday. I still go to kindergarden, but in 4 month time I will enter school. Thats nice, because than in the 6th course I will learn – among other things – English. But I will also learn maths and literature, and science. In 8 years from now, I will change… (more…)

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