i'm emily calandrelli.re here at nasa wallop's flight facility in virginia for an antares rocket launch that's headed to the international space station. but before we blast off, let's go learn the basics of what makes a rocket fly.

i'm emily calandrelli.re at the ivanpah solar facility in the mojave desert where a little later in the show we'll get a tour of the largest solar thermal power plant in the world. but first, let's explore the

i'm emily calandrelli.1957, the space age began when the soviet union launched the first manmade object into space, a satellite called sputnik one. back then, we learned about the density of the upper layers