Last Day to Order Eclipse Glasses from Amazon Via Ground Shipping

We're just days away from the Great American Eclipse, a total solar eclipse

viewable along a swath of the United States and one we won't witness again until 2024. But as excited as we are about the upcoming eclipse, one should never look at a partial solar eclipse without proper eye protection. For skywatchers buying their eclipse glasses via Amazon, today is the last day you can order glasses via ground shipping with delivery in time for the Aug. 21 event. (Prime members can of course still get deliveries in as little as two days, though we recommend ordering sooner rather than later to ensure they arrive on time.)