There may be Earth-size satellites orbiting exoplanets that can be detected using Kepler data. But where the HEK are they?
A potentially habitable alien planet has been found orbiting a nearby star
The array could be the most complex and versatile radio telescope ever attempted, with the capacity to sweep the entire northern sky in 45 days for low-frequency radio waves
The ambitious Laser Interferometer Space Antenna, a casualty of tightening budgets, could rise again
A sun-watching spacecraft has for the first time tracked a comet's path all the way into the solar atmosphere
Inside the experiment to detect if space is made of chunks
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