Photos: EchoStar 19 launch as seen from press site

The last unflown variant of United Launch Alliance’s Atlas 5 launcher — fitted with a five-meter fairing and a single strap-on solid rocket booster — will carry a pair of U.S. military space surveillance satellites toward geosynchronous orbit from Cape Canaveral late this year, according to a Space Force spokesperson.

The Space Force says it changed the nickname of a GPS navigation satellite launched in June from Columbus to instead honor Matthew Henson, a Black explorer on the first expedition to the North Pole more than a century ago, “to acknowledge a fuller history of courageous explorers and pioneers.” The military’s next GPS navigation satellite, set for launch Friday night, is nicknamed Sacagawea.

NASA astronaut Chris Cassidy’s family will be watching remotely from halfway around the world when he blasts off April 9 from Kazakhstan to begin a six-month expedition on the International Space Station.