Streaks of light seen in the sky over the Sacramento area on Friday night — shocking some St. Patrick’s Day revelers — were likely caused by burning space debris. Jonathan McDowell, an astronomer at the Harvard-Smithsonian Center for Astrophysics, says he’s “99.9% sure it was a Japanese communications antenna jettisoned from the International Space Station in 2020.” #space #spacedebris #astrophysics #internationalspacestation #keeplookingup SUBSCRIBE to ABC News on YouTube: https://bit.ly/2vZb6yP Latest updates: http://abcnews.go.com/ Watch FULL EPISODES on Hulu: http://abcn.ws/3bzvQQn