Annie Jump Cannon, a pioneering and record-setting astronomer at a time when women couldn't even vote, is featured at My Girl Heroes;
Even though we know a lot about Mars, the Red Planet still holds many mysteries, SciShowSpace explains;
Cassini gears up for its final mission, a dive into the ringed planet on September 15;
This week's Physics Crash Course videos explain Rotational Motion and Torque;
From a million miles away, NASA's Earth Polychromatic Imaging Camera (EPIC) captured 12 images of the moon’s shadow over North America on August 21, 2017; and
Jim Ingalls from the Spitzer Space Center discusses the biggest technical challenges overcome by his team.

"Voyager: 40 Years in Space," Alan Cummings celebrates the anniversary of the spacecraft's 1977 launch, held at NASA's Jet Propulsion Laboratory.