Citizen science pays off.
Both companies aim to facilitate six crew missions each to the ISS between 2019 and 2024.
The successful test is a major milestone for "the world's most magnificent time machine."
An international ban on harmful chemicals is having the desired effect.
The "service stations in orbit" will increase the lifespan of current satellites.
What role does AI play in the search for life in the universe?
It would launch in the coming decades. Is there any hope of success?
The drone-like robot could help us explore the potential for life on Titan.
Plans are still in early development — so early, the mission doesn't even have a name yet.
SpaceX also safely landed the rocket back on Earth.
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