The Eta Aquarid meteor shower will soon light the sky with debris from Halley’s comet. But a bright moon will spoil the fun this year, making the display harder to glimpse. The shower will peak Tuesday night into Wednesday morning and views will be best in the Southern Hemisphere. In the north, skywatchers will likely see fewer than 10 meteors per hour. Meteor showers happen when the Earth charges through trails of debris left behind from various space rocks. To glimpse the meteors, it’s best to go outside just before dawn and look for fleeting trails of light.