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.
Loading
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
- 23 Sep: Planetary Science Advisory Committee Meeting
- 26 Sep: Astronomy and Astrophysics Advisory Committee Meeting
- 26 Sep: Hearing: Understanding, Forecasting, and Communicating Extreme Weather in a Changing Climate
- 1 Oct: Heliophysics Advisory Committee Meeting
- 3 Oct: STA Meeting WIth Dave Pierce And Dale Nash
- 5 Oct: Venera-D Landing Sites and Cloud Layer Habitability Workshop
- * Submit Your Event | More Events *
Recent Articles
Masthead
Tip your editors
tips@spaceref.com