Space entrepreneurs are excited about the promise of asteroid mining. But there are a lot of big, complicated questions they'll have to answer before we know if they can ever make a profit from it.

If an alien civilization is advanced and powerful enough, could evidence of their existence be written on a galactic scale?

Space exploration and long term settlements of alien worlds might actually be a recipe for creating new countries with their own cultures, languages, and armed forces.

Playboy wants an adults-only luxury hotel in space. This is a great idea and not because of the implication.

Contrary to popular belief, the Apollo program wasn't all that popular when it was underway.

"Whoops, sorry about colliding with your satellite, it was a complete accident we'll absolutely investigate. We promise..."

We need to clean up Earth's orbit from more than half a century of working in space. But it's a complicated task, logistically and politically.

Mars should have some sort of live according to all the evidence we've gathered so far. But do we really know for what we're looking?

For decades, scientists thought that a habitable world needed a large moon to act like a rudder. That idea might not actually be true.

We can make our space rovers and probes much smarter than they are today. But we have to get innovative to protect them from alien environments.

If we want to really explore alien worlds, our drones and probes should lead the way.

Just like supermassive black holes, planets can bend light with their gravity. But do they bend it enough for us to detect them that way?

Internet pedants fact checking space battles like to pick on the idea of deploying fighters in space. That seems like a big mistake.

If we're going to go to Mars and do it right, we should be ready for the price tag.

A study says that more of Mars than Earth should be hospitable to life. But the data on which this conclusion is based is incomplete.