Free Astronomy Magazine July-August 2023

Editor in chief Michele Ferrara Scientific advisor Prof. Enrico Maria Corsini Publisher Astro Publishing di Pirlo L. 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 Pirlo L. or included with permission of its author. Reproduction or retransmission of the materials, in whole or in part, in any manner, with- out the prior written consent of the copyright holder, is a violation of copy- right law. A single copy of the materi- als available through this course may be made, solely for personal, noncom- mercial use. Users may not distribute such copies to others, whether or not in electronic form, whether or not for a charge or other consideration, with- out prior written consent of the copy- right holder of the materials. The publisher makes available itself with having rights for possible not charac- terized iconographic sources. Advertising - Administration Astro Publishing di Pirlo L. Via Bonomelli, 106 25049 Iseo - BS - ITALY email admin@astropublishing.com ASTROFILO l’ July-August 2023 BI-MONTHLY MAGAZINE OF SCIENTIFIC AND TECHNICAL INFORMATION FREELY AVAILABLE THROUGH THE INTERNET English edition of the magazine How long until Betelgeuse explodes? First direct image of a black hole expelling a powerful jet BlackGEM telescopes begin hunt for gravitational-wave sources Concentric gas and dust discs around the star TW Hydrae A vast reservoir of hot gas in the Spiderweb protocluster A possible preview of the ultimate fate of Earth Distant gas clouds with leftovers of the first stars Rubin Observatory reaches major milestone A closely bound duo of energetic quasars VISTA reveals hidden views of vast stellar nurseries First kilonova progenitor system identified 4 12 18 22 26 28 32 36 40 42 48