US space agency hoped to be flying astronauts to the International Space Station by this year, but has had to extend contract with Russia for $490 million
The search for vital signs of life in the atmospheres of other planets has taken a new turn with a vast library of biosignatures that could help us detect ET
Asteroids called Trojans sit in gravitational wells around planets in our solar system – now data from the Kepler spacecraft suggests it happens elsewhere too
Fly me to the moon, sat-nav. Repurposing GPS satellites to direct lunar-bound spacecraft could make getting there cheaper and also improve navigation on Earth