Nobody knows for sure - but it’s possible.
There are probably more than a million planets in the universe for every single grain of sand on Earth. That's a lot of planets. My guess is that there probably is life elsewhere in the Universe.
Once people get there, Mars will be contaminated with Earth life.
NASA/Pat Rawlings, SAIC
Space researchers have had a careful approach to robotic exploration of Mars and been hands-off toward Europa and Enceladus. Why is human exploration – and inevitable contamination – of Mars different?
The Sun is a star – but it’s not the only one.
NASA/GSFC/Solar Dynamics Observatory
There are lots of places where it's much, much hotter than the Sun. And the amazing thing is that this heat also makes new atoms - tiny particles that have made their way long ago from stars to us.
Pluto’s ghoulish cousin, 2015 TG387, lurks in the distant reaches of our own Solar System.
Illustration by Roberto Molar Candanosa and Scott Sheppard, courtesy of Carnegie Institution for Science.
Whether you call it Planet X or Planet Nine, talk of another planet lurking in our Solar system won't go away. So what does the discovery of a new object – nicknamed "The Goblin" – add to the debate?
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.
Enjoying the planets lined up in a row.
The five planets visible to the naked eye since ancient times are putting on a dazzling display this month, in a night-sky dance along with the Moon.
Pluto in enhanced color, to illustrate differences in the composition and texture of its surface.
NASA / Johns Hopkins University Applied Physics Laboratory / Southwest Research Institute
Pluto has a density between that of rock and ice – so that immediately suggests the dwarf planet is made of a mix of both. But how do we know?
The other galaxies are there, but they are hiding a very long way away.
We are in the Milky Way. If you travelled on an extremely fast spaceship for more than two million years, you would reach our neighbour, the Andromeda galaxy. All other galaxies are even further away.
Venus shines bright in the sky above Victoria.
Flickr/Indigo Skies Photography
The planets we can see in the sky were known to the ancient Greeks as 'wandering stars'. But they appeared much earlier in the stories and traditions of Australia's Indigenous people.
The colorful cloud belts dominate Jupiter’s southern hemisphere in this image captured by NASA’s Juno spacecraft.
NASA/JPL-Caltech/SwRI/MSSS/Kevin M. Gill
Jupiter's bands are one of its most striking features – and can be seen from Earth – but they only go so deep within the giant planet. Now scientists think they know why.
The Blood Moon from January 31, 2018. Our second chance to see an eclipsed Moon this year is coming up on July 28.
All five five planets visible to the naked-eye are on show in the night skies over Australia, and a Blood Moon on the way too.
In fact, some things are slowing the Earth down or could change its spinning in the future.
To answer this tricky question, we have to look back in time to when the Earth was born, 4.5 billion years ago.
3D render of Pluto.
Images from New Horizons spacecraft provide more evidence about the surface of Pluto.
Imagined view from Kepler-10b, a planet that orbits one of the 150,000 stars that the Kepler spacecraft is monitoring.
NASA/Kepler Mission/Dana Berry
When NASA first started planning the Kepler mission, no one knew if the universe held any planets outside our solar system. Thousands of exoplanets later, the search enters a new phase as Kepler retires.
A new trajectory means the mission to uncover core facts about the asteroid belt will happen sooner than planned.
NASA/JPL/University of Arizona
Simulations in a special chamber suggest how the Mars landscape could have been shaped under certain conditions.
The Viking landers in the 1970s were the last to look directly for life on Mars.
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.
The mass of the Earth is big enough that the gravitational force it creates can pull the hard shape of ice, rock and metal into a sphere.
NASA Earth Observatory images by Joshua Stevens, using Suomi NPP VIIRS data from Miguel Román, NASA's Goddard Space Flight Center
Imagine the Earth pulling everything it is made up of, all of its mass, towards its centre. This happens evenly all over the Earth, causing it to take on a round shape.
Lasers being shone from the European Southern Observatory’s Very Large Telescope in Chile.
These lasers help remove the twinkles in the night sky and help astronomers see stars clearer on Earth than ever before.
How exactly do the stars twinkle in the night sky? As it turns out, the answer is full of hot air... and cold air.
Two spacecraft concepts for the Plato mission.
While we on Earth are familiar with our own star, the Sun, the European Space Agency's PLATO mission will explore solar systems similar to ours as well as those that are more exotic.