Apparently, this user prefers to keep an air of mystery about them.
11 How vacuous is intergalactic space? Sep 17 '11
9 How will the luminosity of the current very near supernova Ia “PTF 11kly” develop in the next weeks and why? Sep 3 '11
6 Does the current light pollution set a fundamental limit for the range of Earth-based telescopes? Jul 14 '11
3 What is an approximation of the average number of supernovae every century in the Milky Way? Jul 26 '11