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Those with a good view of the eastern horizon in the morning sunrise skies should be on the lookout for the Eta Aquarid meteor shower. The graph shows the view to the east from London at 04:00 BST on May 5. Meteors will emanate in all directions from the radiant point, but the low altitude and light from the waxing gibbous moon will make observation more challenging. Observers should wait around 10 meteors per hour maximum once their eyes have adapted to the darkness, which generally takes 20 to 40 minutes. Those in the southern hemisphere should do better. The radiant will be higher in the sky, and this could double the number of visible meteors. In common with all meteor showers, Eta Aquarids are grains of dust that were once on the tail of a comet. In this particular case, the comet in question is the famous Halley’s Comet. Last seen in Earth’s night sky in 1986, it won’t return until 2061, when it will replenish the Eta Aquarids meteor stream.
