On Aug. 21, the U.S. will experience a historic solar eclipse, which will leave 14 states in night-like darkness for two minutes. NASA is asking for the help of those watching the eclipse in collecting environmental data during the eclipse. Rich Melnick NASA's Goddard Space Flight Center
On Aug. 21, the U.S. will experience a historic solar eclipse, which will leave 14 states in night-like darkness for two minutes. NASA is asking for the help of those watching the eclipse in collecting environmental data during the eclipse. Rich Melnick NASA's Goddard Space Flight Center

What you need to know about the total solar eclipse

August 01, 2017 12:45 PM