During one of my annual vacations to Maine, I remember being huddled on a beach with a bunch of shivering souls one cold evening in June as an Acadia National Park ranger tried to take us on a tour of the night sky with an underpowered laser pointer. I have no doubt she could see Taurus, Hercules and Pisces in the twinkling sky, but I left the session chillier but no wiser about exploring the firmament after sunset. I could have used Sky Walk that night. Star Walk is an astronomy app for the iPad. It uses all the tablet’s assets to bring the night sky to life in a dazzling and arresting way.
