St. Louis Science Center: Astronomy Fact Of The Day: October 13, 2021

Press release from St. Louis Science Center:

October 13, 2021

Today in 1959, NASA launched Explorer 7 to measure solar X-ray and Lyman-alpha flux, trapped energetic particles, and heavy primary cosmic rays. Secondary objectives included collecting data on micrometeoroid penetration and molecular sputtering and studying the Earth-atmosphere heat balance.

This press release was produced by St. Louis Science Center. The views expressed here are the author’s own.