Goddard Space Flight Center

The Hubble Space Telescope, imaged in orbit by the crew of the Space Shuttle Atlantis in 2009 (Photo: NASA, STScI)

Space Systems

25 years in orbit: A celebration of the Hubble Space Telescope

April 24 will mark a significant milestone in the life of one of mankind's greatest scientific instruments – the 25-year anniversary of the launch of the Hubble Space Telescope. Join us as we celebrate the history and achievements of the telescope that inspired a generation.

GROVER on the move during a sustained test of the power consumption (Photo: NASA Goddard/Matt Radcliff)

Robotics

NASA's polar robotic ranger passes first test in one of Earth's harshest environments

NASA scientists have unleashed a new robot named GROVER on the arctic terrain of Greenland to demonstrate that its ability to operate with complete autonomy while collecting data on snow and ice using ground-penetrating radar.

This is an artist's concept of a quasar (bright area with rays) embedded in the center of a galaxy. (Image: NASA/JPL-Caltech/T. Pyle - SSC)

Telecommunications

GPS satellites tell us where we are, but what tells them where they are?

GPS devices have permeated society to the point where millions of us rely on them daily for directions, locations and traffic avoidance. But have you ever thought what tells the GPS satellites where they are in the first place?