Mark your calendars, sky watchers: In one week a total lunar eclipse will turn the moon an eerie shade of red. On April 15, at 1:58 a.m., the moon will move into Earth’s shadow. The full lunar eclipse—when the entirety of the moon is shaded by Earth—begins just over an hour later at 3:07 a.m. and lasts until 4:25 a.m. The eclipse will be visible across almost the entire continental United States, most of Canada and Central America and parts of South America. MORE