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- Sat Feb 02, 2008 3:19 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: Explorer 1 (APOD 01 Feb 2008)
- Replies: 3
- Views: 1896
Explorer 1 (APOD 01 Feb 2008)
In the description for the APOD of February 1, 2008, the writer states: "Explorer I ... carried ... an experiment designed by James A. Van Allen to measure the density of electrons and ions in space. The measurements made by Van Allen's experiment led to an unexpected and startling discovery --...