Hitomi / ASTRO-H
Ilustration of the Hitomi x-ray astronomy satellite, launched by JAXA Feb. 17 with instruments from NASA and other space agencies.

NASA and the Japanese space agency JAXA will start work this spring on an orbiting X-ray astronomy telescope to replace one lost shortly after launch last year.

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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...