Vicky Kalogera, a Northwestern University physicist, took her week of much-needed vacation in Utah this past August. She promised her family she'd stay off of email for a week. It wasn't a real promise, of course, but she was going to try. She'd arranged the perfect day for August 17. Her husband was going to take the kids hiking in Arches National Park while she'd spend the whole day at the spa. Right as she left her room, she just had to give her email a peep. The deluge brought the news: Telescopes and detectors across the world were making a monumental observation.
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Arguably the most exciting recent development in astronomy was 2016's announcement of the discovery of gravitational waves, waves that literally ripple the shape of space itself, created by violent events like black holes colliding. But every gravitational wave discovery had always been done with only two detectors, meaning that scientists only knew what caused the waves -- but couldn't really figure out where in the sky they came from.