A look at the debate over building a city on the Moon or Mars, covering scientific findings, mission timelines and challenges discussed on the Fiction Science podcast.

Orbiting 250 miles above Earth, the views from the International Space Station (ISS) are second to none, and always make a huge impact on astronauts lucky enough to stay there. NASA’s Zena Cardman, ...

Tesla, Inc. gets a strong sell rating as its $1.5T valuation looks unjustifiable; robotaxi/Optimus risks loom, and fair value ...

A vacuum Raptor engine was recently test-fired after being "chilled to mimic conditions after a long coast period in space," according to SpaceX. Previously, a Raptor was tested to demonstrate the ...

While much of his fortune is linked to the companies he has founded, invested in or acquired, Musk says very little of that ...

In the coming weeks, Artemis II will send humans around the moon for the first time in more than 50 years. Could it be a ...