Private companies are increasingly challenging national space agencies in a new space race, which comes with great opportunities but also huge risks.
Sending humans to Mars is a 5-10 year project goal for several global operators right now. It's expensive - but Elon Musk unveiled his new commercial plan today.
In the current commercial space race, the idea of reusing rockets is gaining momentum.
Musk dismisses one of the main technical challenges of being on the Martian surface: the temperature.
We could learn a lot from any mission to send people to Mars, such as whether there's life elsewhere in the universe or even the technology for new household appliances.
The Moon belongs to all of us. Let's share in its beauty from afar without splashing around $100 million on a showy space trip.
We need Mars-level thinking to solve our energy and climate problems here on Earth.
Colliding black holes to exploding spacecraft, 2016 was an incredible year for astrophysics.
Musk's know-how cannot be dismissed but there are significant challenges standing between him and his dream of colonising Mars.
A true plan for the colonisation of Mars should include both the social and technical feasibility of living there. Unfortunately, Musk left that bit out.
Whatever happens next in new space race will happen quickly. The opportunity is there for Australia to be involved, but it won’t be there for long.
It is unclear how regulated space activities by private companies really are.
Yes, it really is rocket science.
We're on the cusp of being able to consistently launch and land rockets, greatly reducing the cost of space travel. But how long before there's a Millennium Falcon in every garage?
The 50th anniversary of Luna 9's first soft moon landing reminds us how difficult landing a spacecraft is.
Spaceplanes seem like a great idea – perhaps one that has come too late.
Space is now big business. But is that good – or bad – news for NASA?
Mining in space is no longer science fiction. But could it end wars over resources, as Neil deGrasse Tyson has suggested?
The recent failure of the SpaceX Falcon 9 rocket presents something of a dilemma for NASA, which still has no domestic launch capability of its own to reach the International Space Station.
The turbocharged capitalism of private space flight is strangely at odds with the brotherly, generous global consensus that built the legal framework for extra-terrestrial travel.