The Discussion: Buying and selling astronomy kit A possible resolution to the Wiltshire Audio Anomaly   The News: Rounding up the astronomy news in February, we have: Heavy metal vapours detected around comets A weird supernova Seafloor volcanoes on Europa   The Sky Guide: This month we’re taking a look at the constellation of Ophiuchus with a guide to its history, how to find it, a couple of deep sky objects and a round-up of the solar system views on offer in June.   Q&A: What’s the difference between a nova and a supernova? From our good friend Steven Age in Derby.