Free Astronomy Magazine July-August 2021

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 2021 BI-MONTHLY MAGAZINE OF SCIENTIFIC AND TECHNICAL INFORMATION FREELY AVAILABLE THROUGH THE INTERNET English edition of the magazine DAVINCI+ and VERITAS to explore Venus The spiral of the Southern Pinwheel Powerful stratospheric winds measured on Jupiter for the first time Hubble uncovers concentration of small black holes Ichnoscale − the parameter for technological civilizations ESA’s Test-Bed Telescope 2 installed at La Silla Stellar flare from Proxima Centauri recorded in multiple wavelengths Black hole pairs found in distant merging galaxies 2I/Borisov may be the most pristine comet ever found Gemini North helps set rotational speed limit for brown dwarfs ALMA shows massive young stars forming in “chaotic mess” Hubble watches how a giant planet grows 4 14 18 20 24 32 36 38 42 44 46 48