Long ago in the distant past, our entire Universe was microscopic – just like an atom – and obeyed completely different rules of cause and effect.
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.
Are there stars other than the Sun that might explode soon close to us? Yes, there are! As long as by 'soon' we mean within a million years.
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.
These school holidays, check out the podcast Imagine This, a co-production between ABC KIDS listen and The Conversation. And comb through our Curious Kids series.
Our brain cells do look a lot like a map of the universe – but that doesn't mean they're the same thing.
The career arc of Nichelle Nichols – the first black woman to have a continuing co-starring role on TV – shows how diverse casting can have as much of an impact off the screen as it does on it.
"Sometimes I've believed as many as six impossible things before breakfast." To understand the universe, we need more Mad Hatter mathematicians.
Anish Kapoor made “Cloud Gate”, a giant bean-shaped mirror in Chicago. Visitors play with the light in the city and its surroundings, where our future lays.
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.
The moon is our closest neighbour and our best hope for building capacity to explore space.
Space mining has the potential to provide a greater supply of resources either for being exploited locally for construction or being sent back to earth.
A new name on a few military badges doesn't imply an escalating arms race.
Those who speak of the inevitability of war in space will fuel a race to the bottom, and see even more energy towards an arms race in space.
The blood moon myths are many and varied, but, at the end of the day, it's just an eclipse.
Jeff Bezos plans to charge US$200,000-300,000 for a trip to outer space. And it's going to cost him an astronomical amount of money.
The pull created by a black hole is so strong that if you get too close to one – even if you are travelling away from it at the fastest speed it is possible to go – you will never be able escape.
A wormhole is like a tunnel connecting two places in space. They would be incredibly useful and are great for science-fiction stories.
The problem is we haven't found any evidence of them existing.
An astronomer suggests an idea to piggyback on the ambitious Breakthrough Starshot project that aims to send nano spacecraft to Alpha Centauri at a major fraction of the speed of light.
Trunp's new policy could lead to the militarisation of outer space and the beginning of a new space arms race.