BBC Sky at Night Magazine – October 2019

Transit of Mercury: the complete guide | Planetary perspective: Astronomers’ unique view of climate change | Lightning launch: How Apollo 12 nearly ended before it began | Galaxy next door: Find the Milky Way’s neighbor in binoculars | Distance dilemma: Will we ever see alien worlds close up? | Stars of November: your observing guide to this month’s best targets | PLUS Extra online: Interview with the astronomer who made the first ever detection water vapour in an exoplanet’s atmosphere | Sky at Night episode: Alien Worlds | Download: our Southern Hemisphere all-sky chart and observing guide