Dr. Kirby Runyon

Space Exploration Leader & Zero Gravity Coach and Planetary Geologist, CEO of Planex.space

The Overview Effect at Home: Exploring Otherworldly Terrain With Space Tourists on Earth

Jacqueline Goldin

Extraordinary Associate Professor of Anthropology & Water Science at the University of Western Cape

Paul Sutter

Astrophysicist; Host of “Ask a Spaceman” Podcast; Contributing Editor to Space.com; Producer

Cady Coleman

Former NASA Astronaut; Retired U.S. Air Force Officer & Chemist

Garrett Reisman

Astronaut, Professor of Astronautical Engineering at USC & Senior Advisor at SpaceX

Andy Weir

Science Fiction Author, Known for "The Martian"

Carolyn Porco

Planetary Scientist Known for her Work in the Exploration of the Outer Solar System

Fiorenzo Omenetto

Professor of Biomedical Engineering; Physicist

Konstantin Batygin

Professor of Planetary Science, Caltech

Jill Tarter

Astronomer & Bernard M. Oliver Chair for SETI Research at the SETI Institute; Recognized for Work on Extraterrestrial Intelligence

Ginger Zee

Chief Meteorologist for ABC News, Author & Mental Health Advocate

Chasing Helicity: Through the Storm (The Chasing Helicity Series) (Chasing Helicity Ser...

John Holdren

Professor of Environmental Policy & Director of the Program on Science, Technology, and Public Policy at the Harvard Kennedy School of Government

David Grinspoon

American Astrobiologist, Senior Scientist at the Planetary Science Institute

Venus Revealed: A New Look Below The Clouds Of Our Mysterious Twin Planet

James Green

Director of Planetary Science at NASA Headquarters

Dave Brain

Planetary Scientist

Pamela Melroy

Retired Air Force Officer & Former NASA Astronaut

From Star Trek Posters to NASA: The Journey of Pamela Melroy '83

Peter Girguis

Associate Professor of Natural Sciences at Harvard; Adjunct Research Engineer at the Monterey Bay Aquarium Research Institute

Penelope Boston

Speleologist; Associate Director of the National Cave and Karst Research Institute

Marcelo Gleiser

Theoretical Physicist at Dartmouth College

Paul Snelgrove

Paul Snelgrove led the group that pulled together the findings of the Census of Marine Life -- synthesizing 10 years and 540 expeditions into a book of wonders.