On certain dates in February, an elusive firefall can be spotted at sunset in Yosemite National Park, when the weather cooperates and the direction to the setting Sun is just […]

Congratulations to the #NewAstronauts – see you in space! https://t.co/57ZkY7ylvJ — ESA (@esa) June 7, 2017

Congratulations to @NASA's new class of astronauts announced today! #NewAstronauts https://t.co/uqHt2Lcz3O — Tim Peake (@astro_timpeake) June 7, 2017

LIVE NOW: Meet America’s #NewAstronauts! We’re at @NASA_Johnson in Houston introducing our 2017 astronaut class: https://t.co/XzOKgzDi7k pic.twitter.com/Hlv4wdYCZG — NASA Astronauts (@NASA_Astronauts) June 7, 2017