Back to Article List This week in pictures: September 1–7, 2012 In the past seven days, NASA's Dawn spacecraft departed the asteroid Vesta, Curiosity began stretching its arm, scientists discovered unexpected lithium in a star in globular cluster M4, and more. By Astronomy Staff | Published: September 7, 2012
Science Ask Astro: If gravity is the weakest fundamental force, why is the Sun’s gravity so far-reaching?
Human Spaceflight, Science Ask Astro: How fast could a ship reach light-speed without crushing its human occupants?