By William H. Gerstenmaier, Scott S. Goodwin, and Jacob L. Keaton Before the English explored Australia in the 1600s, it was held as an indisputable fact in Europe that all swans were white.
By Frank J. Cepollina From its ignominious beginnings to its triumphant redemption, the story of the Hubble Space Telescope is known around the world. What is less well known is the story behind the story—the elements that made Hubble’s ultimate success possible.
By Charles Tucker Spinning the upper stage of a rocket in flight is one way to stabilize the vehicle, just as a bullet spins to stay on course. But liquid propellant sloshing around in a spacecraft’s fuel tanks produces a wobble, or nutation, that can cause instability and alter flight trajectory. The rate of wobble […]
By Carol Anne Dunn and Francis J. Merceret Mark Twain once said, “Everyone talks about the weather but nobody does anything about it.”
By Rick Grammier Juno was selected in 2005 with an initially scheduled launch in 2009. Almost immediately, though, NASA Headquarters warned us that budgetary issues would delay the launch a year or two and asked the project team to prepare a cost assessment for a 2010 launch.