Many of the multi-planet systems discovered to date have been notable for their compactness, with neighbouring planets closer together than any in the Solar System.
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Exploration Science & Technology: March 2017
Calendar
- 6 Jul: The First Penn State SETI Symposium
- 8 Jul: 2020 NASA Exploration Science Forum
- 8 Jul: NASA Advisory Council Aeronautics Committee Meeting
- 8 Jul: Artemis Accords: A Model for Space Settlement International Protocols? (Webinar)
- 9 Jul: NASA Science Mission Directorate Public Town Hall
- 9 Jul: Planetary Protection and Lunar Activities (Webinar)
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