A later addition to Space Station M was the magnificent Tycho M50 Telescope. It is the only instrument of its kind to be put into space; its polished brass fittings and delicately ground Austrian lenses require constant maintenance. Paco Wang, an amateur astronomer, credits the M50 in connection with his discovery of the neutrino nursery in L2241. No professional astronomer has been able to verify this rarity, however, even by using more powerful and up-to-date equipment.