Latest ROSAT Stories
For decades, scientists have been debating over a fog of low-energy X-rays that has been observed over the entire sky. An international group of scientists has used a NASA-funded instrument to resolve this debate.
Down on the ground, death equals stillness – but not in space. Derelict satellites can tumble in unpredictable ways and ESA’s team tasked with developing a space salvage mission want to find out why.
The German-built Röntgensatellit (ROSAT) fell back to Earth Saturday evening, according to officials from NASA and the German Aerospace Center.
Less than a month after one defunct satellite plummeted back to Earth, it appears as though a second is on its way, and the debris could reach our planet's surface by the end of the month.
A second satellite is reportedly headed for Earth and should re-enter our planet's atmosphere sometime next month.
NASA's Swift Gamma-ray Explorer satellite rocketed into space in 2004 on a mission to study some of the highest-energy events in the universe. In that time, Swift also has observed 80 exploding stars and studied six comets.
X-Ray Astronomy -- Although the more energetic X-rays (E > 30 keV) can penetrate the air at least for distances of a few meters (they would never have been detected and medical X-ray machines would not work if this was not the case) the Earth's atmosphere is thick enough that virtually none are able to penetrate from outer space all the way to the Earth's surface. X-rays in the 0.5 - 5 keV range, where most celestial sources give off the bulk of their energy, can be stopped by a few...