Terrestrial Solar System planets either have high mean molecular weight atmospheres, as with Venus, Mars, and Earth, or no atmosphere at all, as with Mercury.
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Extrasolar Planets: May 2018
K2-18 is a nearby M2.5 dwarf, located at 34 pc and hosting a transiting planet which was first discovered by the K2 mission and later confirmed with Spitzer Space Telescope observations.
Calendar
- 22 Apr: What is it about humans that drives us to travel and explore the unknown?
- 23 Apr: Space and Africa: Developments and Cooperation
- 23 Apr: Space Liftoff Event
- 26 Apr: Nobel Prize Summit ‘Our Planet, Our Future’
- 28 Apr: The Americas Space Summit
- 28 Apr: Washington Space Business Roundtable Event: Don Beyer
- 28 Apr: The Military Role in Enabling Communities Beyond Earth
- 30 Apr: Success and Failure on Mars: Mechanics in the Exploration of Space
- 4 May: NASA Glenn Small Business Connection Virtual Meeting
- 6 May: Space Transportation Association meeting with Robert Cabana, Director, Kennedy Space Center
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