NASA TV operates three channels. The "Public Channel" provides 24-hour broadcasting of live and recorded events and documentaries aimed toward the general public, as well as space and science programming for schools, museums, and other educational institutions.The "Media Channel" is dedicated to broadcast news organizations and other members of the press, …

NASA TV airs a variety of regularly scheduled, pre-recorded educational and public relations programming 24 hours a day on its various channels. Programs include "This Week @ NASA", which shows news from NASA centers around the country; “Science Live,” which features news and discoveries from the Science Mission Directorate; "Video File", which broadcasts b-roll …

Christopher John "Chris" Cassidy (born January 4, 1970) is a retired NASA astronaut and United States Navy SEAL.Chris Cassidy achieved the rank of captain in the U.S. Navy.His first spaceflight was on a Space Shuttle mission in 2009. He was the Chief of the Astronaut Office at NASA from July 2015 until June 2017.