Launched by the Soviet Union in 1957, Sputnik 1 became the world's first artificial satellite – a "simple" battery-powered radio transmitter inside an aluminium shell about the size of a beach ball. This started a race ...
Fuel that froze on a Russian Soyuz rocket caused two satellites from Europe's troubled Galileo navigation system to be placed into the wrong orbit in August, an investigation concluded Wednesday.
When space probes, such as Rosetta and Cassini, fly over certain planets and moons in order to gain momentum and travel long distances, their speed changes slightly for an unknown reason. A Spanish researcher has now analysed ...
Jupiter's icy moon Europa may have active tectonic plates similar to those that shape the Earth, which had long been thought unique in this respect, scientists said Sunday.
Experts are racing to identify and fix a problem that saw two satellites from Europe's troubled Galileo satnav programme sent into the wrong orbit.
Two European Galileo satellites launched as part of a navigation system designed to rival GPS have failed to locate their intended orbit, launch firm Arianespace said Saturday.
When Saturn is at its closest to Earth, it's three-quarters of a billion miles away—or more than a billion kilometers! That makes these raw images from the ringed planet all the more remarkable.
Two satellites for Europe's rival to GPS were lifted into space on Friday to boost the Galileo constellation to six orbiters of a final 30, the European Space Agency (ESA) said.
Two satellites for Europe's rival to GPS, the Galileo navigation system, will be lifted into space from French Guiana on Friday a day after bad weather delayed their blast-off, launch firm Arianespace said.
Bad weather delayed the liftoff Thursday of a rocket with two new satellites for Europe's rival to GPS, launch firm Arianespace said as it announced 12 orbiters will join the constellation from next year.