Varied terrain on Europa.
Whether anything could live in Europa's subsurface ocean depends on what kind of salt it contains. Now scientists have found out.
There are tens of thousands of pieces of space debris orbiting the Earth, and the amount is growing.
There needs to be an international approach regarding the management and disposal of space junk.
Territorial claim? US astronaut Buzz Aldrin salutes the American flag.
A new study suggests that we should limit ourselves to developing just one eight of the solar system.
Even if we can prevent a global warming apocalypse, our planet won’t be safe forever – the sun will one day expand. So should we try to move the Earth to a wider orbit?
Israel's first moon mission failed to land successfully on the moon's surface.
The Saturn V rocket, here launching SkyLab, also sent Apollo 11 to the moon.
There is currently no launch vehicle capable of launching astronauts to the moon in one go.
Methane detected at Mars’ Gale Crater (the centre picture).
For the first time, an instrument orbiting Mars and a rover on the surface have detected methane simultaneously – raising hopes for finding life on the red planet.
A large, sea jelly-like antenna shadow from the Apollo 14 mission in 1971.
This year the Apollo 11 mission turns 50 - but what does the future hold for the Moon? The ephemeral shadows cast by human artefacts may soon be joined by more permanent scars of lunar mining.
President Richard M. Nixon welcomes the Apollo 11 astronauts aboard the USS Hornet, the recovery ship for the mission, where they are quarantined. From left to right: Neil A. Armstrong, Michael Collins and Edwin E. Aldrin.
Objects left on the Moon are not just abandoned rockets and rovers. There is a lot of historic and sentimental memorabilia. Some of it hints at a mission that the first Moonwalkers almost forgot.
Scientists conduct research in Hawai'i Volcanoes National Park to practice for Mars landings.
To prepare for future Mars missions, scientists collect samples and simulate communications conditions from volcano parks on Earth.
Opportunity in Endurance Crater.
Rovers including 'Rosalind Franklin' will pick up where Opportunity left off – trying to answer the question of whether there is, or ever has been, life on Mars.
Astronauts on space missions experience various physiological effects.
Here's what NASA scientists discovered when an astronaut went into space and his twin remained on Earth.
China National Space Administration/EPA
The moon's far side looks redder than its near side. An expert explains what the actual colour is.
China has become the first to land on the far side of the moon. And unlike previous uncrewed moon landings, it relied on sophisticated technology rather than luck.
The solar system’s largest volcano Olympus Mons on Mars, seen by Viking 1.
Naming features on other worlds is a trickier issue than you might think.
Signs of life on Mars? These are the tracks of NASA’s Curiosity rover exploring the Martian landscape.
Mars has long captured our imagination, from claims of canals to Martian attacks and now our latest NASA exploration to look inside the red planet.
Once people get there, Mars will be contaminated with Earth life.
NASA/Pat Rawlings, SAIC
NASA's InSight Mars lander touches down Nov. 26, part of a careful robotic approach to exploring the red planet. But human exploration of Mars will inevitably introduce Earth life. Are you OK with that?
Mars seen by the Viking orbiter.
There's enough dissolved oxygen in the salty lake below Mars' surface to support simple lifeforms such as sponges. Here's what that means for space exploration.
BepiColombo MPO at Mercury,
Spacecraft ESA, Mercury NASA
It will take more energy to get the BebiColombo spacecraft inro a stable orbit around Mercury than it would to send it all the way to Pluto.
There are plans to cause HAVOC on Venus.
The upper atmosphere of Venus is the most Earth-like extra-terrestrial location in the solar system. It could even host life.