The final 2017-2018 Cosmic Explorations Speaker Series lecture will take place at the Lunar and Planetary Institute on Thursday, April 5, at 7:30 pm. Dr. Sue Lederer of the Orbital Debris Program Office at the Johnson Space Center will present “The Ultracool TRAPPIST-1 System: 7 Terrestrial Worlds, 7 Chances for Ice and Life.” If you can’t attend in person, make plans to watch the presentation streamed live through the USRA Ustream channel.