Free Astronomy Magazine September-October 2025

Editor in chief Michele Ferrara Scientific advisor Prof. Enrico Maria Corsini Publisher Astro Publishing di Ferrara M. Via Bonomelli, 106 25049 Iseo - BS - ITALY email info@astropublishing.com Internet Service Provider Aruba S.p.A. Via San Clemente, 53 24036 Ponte San Pietro - BG - ITALY Copyright All material in this magazine is, unless otherwise stated, property of Astro Publishing di Ferrara M. or included with permission of its author. Reproduc- tion or retransmission of the materials, in whole or in part, in any manner, without the prior written consent of the copyright holder, is a violation of copyright law. A single copy of the ma- terials available through this course may be made, solely for personal, non- commercial use. Users may not distrib- ute such copies to others, whether or not in electronic form, whether or not for a charge or other consideration, without prior written consent of the copyright holder of the materials. The publisher makes available itself with having rights for possible not character- ized iconographic sources. Advertising - Administration Astro Publishing di Ferrara M. Via Bonomelli, 106 25049 Iseo - BS - ITALY email admin@astropublishing.com ASTROFILO l’ September-October 2025 BI-MONTHLY MAGAZINE OF SCIENTIFIC AND TECHNICAL INFORMATION FREELY AVAILABLE THROUGH THE INTERNET English edition of the magazine Vera C. Rubin Observatory unveils its first imagery A star met its end by detonating twice Gemini North observes comet 3I/ATLAS Webb refines the Bullet Cluster's mass New clues about gamma-ray bursts jets Sparse pockets of light amongst dark clouds of Chamaeleon I Protoplanetary disks in high resolution The dawn of a new solar system The most energetic explosions since the Big Bang Long-predicted companion of Betelgeuse discovered No certainty of a Milky Way–Andromeda collision 4 8 12 16 22 26 30 34 38 46 50