Christian Buil is a wonder. This Frenchman amateur astronomer has been a driving force behind a number of excellent amateur spectroscopy projects and products such as the instruments sold by…

Supernova 2022hrs, discovered by amateur astronomer Koichi Itagaki on April 16.619 (14:50h UT) is in NGC 4647, an intermediate spiral galaxy in the constellation of Virgo. He used a 0.5-metre,…