The week in pictures: February 16–22, 2013

In the past seven days, astronomers began to develop a system to identify dangerous asteroids before their final plunge, scientists think 120-mile-long Tinto Vallis formed around 3.7 billion years ago, Cassini detected a significant acceleration of electrons in a quasi-parallel shock on Saturn, and more.
By | Published: February 22, 2013 | Last updated on May 18, 2023