How much light has been emitted by all galaxies since the cosmos began? After all, almost every photon from ultraviolet to far infrared wavelengths ever radiated by all galaxies that ever existed throughout cosmic history is still speeding through the Universe today. If we could carefully measure the number and energy (wavelength) of all those photons we might learn important secrets about the nature and evolution of the Universe.
The Ring Nebula's distinctive shape makes it a popular illustration for astronomy books. But new observations by NASA's Hubble Space Telescope of the glowing gas shroud around an old, dying, sun-like star reveal a new twist.
Magnetars - the dense remains of dead stars that erupt sporadically with bursts of high-energy radiation - are some of the most extreme objects known in the Universe. A major campaign using NASA's Chandra X-ray Observatory and several other satellites shows magnetars may be more diverse and common - than previously thought.
NASA is looking for far-out ideas. NASA's Innovative Advanced Concepts (NIAC) Program is seeking Phase II proposals for continuation of promising studies selected during the first phase of the visionary program.
Pulsars have a number of unusual qualities. Like zombies, they shine even though they're technically dead, and they rotate rapidly, emitting powerful and regular beams of radiation that are seen as flashes of light, blinking on and off at intervals from seconds to milliseconds. A NASA team has built a first-of-a-kind testbed that simulates these distinctive pulsations.
The University of Luxembourg in collaboration with the Max Planck Institute Luxembourg for International, European and Regulatory Procedural Law and the SES Chair in Satellite Communication and Media Law present the 2nd Luxembourg Workshop on Satellite Communication entitled Satellite Communication and Dispute Resolution.
A new window into the nature of the universe may be possible with a device proposed by scientists at the University of Nevada, Reno and Stanford University that would detect elusive gravity waves from the other end of the cosmos.
Taking before and after pictures of Martian terrain, researchers of the HiRISE imaging experiment have identified almost 250 fresh impact craters on the Red Planet, providing a more accurate yardstick of surface processes on Mars.
Scientists have created the first global topographic map of Saturn's moon Titan, giving researchers a valuable tool for learning more about one of the most Earthlike and interesting worlds in the solar system.