This week, skywatchers can enjoy two binocular comets: C/2025 A6 Lemmon (magnitude 5) and C/2025 R2 SWAN (magnitude 6), with SWAN high in the southwest and Lemmon lower in the northwest. Key events include multiple double-shadow transits on Jupiter, a Mercury-Mars conjunction in bright twilight, and the Orionid meteor shower peaking on October 21 under a dark, Moon-free sky. Saturn shines in the east-southeast after dusk, Jupiter dominates late-night skies, and Venus gleams in the dawn with a thin crescent Moon on October 19. Seasonal highlights include the Big Dipper low in the northwest and Arcturus as the "Ghost of Summer Suns." https://skyandtelescope.org/astronomy-news/this-weeks-sky-at-a-glance-october-17-26/