Planetary protection protocols try to make sure we don't seed places like Mars with life from our planet. An astrobiologist argues they're misguided – especially with human astronauts on the horizon.
Space exploration is exciting - but there are barriers for humans hoping to visit and even stay on planets. Buried ice on Mars could be a water source for interplanetary visits of the future.
The last signals from Cassini space probe before it burns up in Saturn's atmosphere will tracked by the Canberra Deep Space Communication Complex.
The Cassini space probe discovered liquid lakes, poisonous gases and the basic elements of life on Saturn's moon, Titan.
The Cassini space probe took us up close and through the beautiful rings of Saturn. It captured some amazing images, and even the sound of the rings during its mission.
The Cassini space probe discovered several new moons on its mission to Saturn, and revealed fresh views of the moons we already knew about.
With only days to go before NASA's Cassini space probe ends its two-decade mission to explore Saturn, what has it revealed about the ringed planet, the second largest in our solar system?
Humanity is the real target for these recordings which continue to inspire us to better understand ourselves and our place in the cosmos.
Even if alien life is never discovered, all is not lost.
Operating the two spacecraft that make up BebpiColombo will be harder than rocket science, says a member of its science team.
Cassini is about to crash into Saturn to avoid contaminating its habitable moon Enceladus.
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.
We may need to re-think our models of Jupiter’s formation thanks to the first results from Juno probe orbiting the planet, and new observations from Earth.
There are loads of applications for 3D printers in space.
To get us to Mars and beyond, a team of students from around the world has a plan involving lunar rovers mining ice and a space station between the Earth and the moon.
From acoustic holograms to tractor beams.
With the probe now on its 'Grand Finale,' a Cassini team member describes the amazing discoveries it made about the ringed planet and its many moons.
Often eclipsed by Apollo 11, the final manned moonshot left far more than bootprints in the dust. In these troubling times, it also left us with a lasting message of hope.
Enormous odd feature presents puzzle for scientists.
Letters from would-be girl astronauts in the 1960s tell part of the complicated story of sexism – in both NASA and the US at large – at the dawn of the space age.