Why weightlessness in space is about balancing forces rather than a lack of gravity.
The plan to use lasers to send mini-spaceships to the stars.
It's an ambitious plan to send a micro-spaceship to our stellar neighbour but is this possible with today's technology or even technology in the near future?
Are we soon to visit Alpha Centauri (left)?
Building a tiny starship may be doable. The big challenge will be making sure it survives all the hazards in interstellar space.
SpaceX’s Falcon 9 rocket blasts off.
Yes, it really is rocket science.
Gene Cernan driving a lunar rover in December 1972.
The Last Man on the Moon is much more than a biographical documentary – it is a gripping account of human endeavour.
What are you thinking? Robots and humans working together need to understand – and even trust – each other.
People and machines need to be able to interact and communicate effectively. Right now we – and they – can't. But without that, we risk missing the potential benefits of collaboration.
New Horizons continues to help unravel the icy dwarf planet’s secrets.
NASA/Johns Hopkins University Applied Physics Laboratory/Southwest Research Institute
After last summer's Pluto flyby, the New Horizons spacecraft started sending data back to Earth – at 2 kilobits per second. Here's some of what scientists have learned so far from that rich, slow cache.
The only way to fly the friendly skies – or dark voids of space.
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?
Walk on the wild side.
Scott Kelly's year in space is over. Now we need to know what it did to his body.
Out of this world.
We already have much of the technology we’d need to start a colony on another planet.
How would people react to mining on the moon?
No one nation should be allowed to go it alone and develop a mining industry in space. It needs an international effort and Australia, with a long history in mining, can play its part.
Don’t get too close.
The spectacular science of quasars, no hair theorum and spaghettification.
The 50th anniversary of Luna 9's first soft moon landing reminds us how difficult landing a spacecraft is.
Tragedy: Challenger exploded shortly after launch from the Kennedy Space Centre.
We should honour the dead by striving to go further.
No warp drives or worm holes required.
Nice night for a stroll: Scott Kelly working outside the International Space Station in 2015.
What's life like in a hostile environment that's literally out of this world?
How many astronauts does it take to undo a bolt?
Scientists on the International Space Station are preparing for one of the biggest DIY challenges of their lives.
NASA’s Juno probe will be the fastest object humanity has ever created when it approaches Jupiter.
From the high-speed journey to Jupiter to solar eclipses, meteor showers and planetary alignments visible in the skies above -- add these space highlights to your 2016 calendar.
Ceres, as seen by NASA’s Dawn spacecraft on December 10, around a crater chain called Gerber Catena.
Dawn's mission director and chief engineer describes his 'dream come true' job – and how the new data coming back from Ceres could unlock some of the secrets of the earliest days of our solar system.
© 2014 Lucasfilm Ltd. & TM
Four decades later, I find myself surveying 13 billion years of cosmic history and mapping events that really did happen a long time ago in galaxies far, far away.