The launch of the first Joint Polar Satellite System (JPSS) spacecraft, once set to take place this month, has been delayed again because of technical issues, this time until no earlier than July.

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Jeff Foust has more than a decade of experience writing about space policy, entrepreneurial ventures and regulatory affairs. In 2001, he established spacetoday.net to aggregate and summarize the day's space-related news stories. In 2003, he started The...