Lisa Kaltenegger

Award-Winning Astrophysicist & Astrobiologist; Director of the Carl Sagan Institute at Cornell

Lisa Kaltenegger - Cornell University

Michelle Borkin

Michelle Borkin is a PhD candidate in applied physics. She works with the Astronomical Medicine Project and interdisciplinary 3D visualization techniques.

Elsa Shiju

Aspiring Astronaut, Space Enthusiast & Speaker

Andrew Feustel

Geophysicist & Former NASA Astronaut

Athena Brensberger

Science Communicator and International Model

Andrew Connolly

Astronomer

Maggie Aderin-Pocock

Space Scientist & Educator; Dyslexia Advocate

Sheperd Doeleman

Astrophysicist at the Center for Astrophysics at Harvard University & Director of the Event Horizon Telescope

John M. Grunsfeld

Physicist & Former NASA Astronaut

Priyamvada Natarajan

Professor of Astronomy & Physics at Yale University; Author of "Mapping the Heavens"

Enrico Ramirez-Ruiz

Professor at UC Santa Cruz, Astrophysicist & Stellar Mortician

Jill Tarter

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

Guy Consolmagno

Astronomer, Director of the Vatican Observatory & President of the Vatican Observatory Foundation

Alexander Gerst

German European Space Agency Astronaut & Geophysicist

Social video with ISS astronaut Alexander Gerst

Ed Lu

Physicist, Engineer, Entrepreneur & Former NASA Astronaut; Co-Founder & Executive Director of the Asteroid Institute at the B612 Foundation

Nergis Mavalvala

Professor of Astrophysics at MIT & Dean of the MIT School of Science

Paul Sutter

Theoretical Cosmologist, NASA Advisor, U.S. Cultural Ambassador & Author; Host, "How the Universe Works," "Space Out" & "Ask a Spaceman"

Clara Sousa-Silva

Quantum Astrochemist & Science Communicator

Avi Loeb

Harvard University Professor of Science

Emily Lakdawalla

Senior Editor at The Planetary Society