Postdoctoral researcher, Institut für Astrophysik Göttingen.
41 Why is the sky not purple? may 24 '12
39 What conservation law corresponds to Lorentz boosts? jul 21 '11
20 Why do Maxwell's equations contain each of a scalar, vector, pseudovector and pseudoscalar equation? dec 24 '12
19 Why are stars, planets and larger moons (approximately) spherical in shape (like, the Sun, the Moon, the Earth, and other planets)? sep 19 '11
18 Why do we always see the same side of the Moon? sep 2 '11
17 What could explain the measurements that the Methuselah star is older than the universe? aug 12 '13