Cosmology
White holes explained
We've all heard of black holes. But what about white holes? Could they really exist?
This is light from the birth of the Universe. It's called the Cosmic Microwave Background, and it's mind-boggling
A clearer picture of the early Universe is emerging thanks to studies of the Big Bang’s afterglow
We don't know why the Universe expansion is speeding up. Dark energy is the biggest mystery in science
Govert Schilling investigates dark matter, what we've learned about it, and what we might discover in the future.
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The Universe is bigger than its age. How the speed of light makes time-travellers of stargazers
How is the Universe so big, and why does its size seem to be bigger than its age?
Astronomy explained | What is spacetime?
What is spacetime, and is time really all a matter of perspective?
We don't know why anything exists at all. Nine things we still can't explain about the Universe
Some of the cosmic mysteries eluding explanation.
What came before the Big Bang? These are the best theories we have about the origin of the cosmos
We explore the theories about one of the most mind-boggling questions about the Universe.
We asked an astronomer the biggest, trickiest questions about the Universe. These are his answers
We asked a radio astronomer to address some of the biggest unanswered questions about space and the Universe.
How old the Universe is, and how we know
How do astronomers estimate how old the Universe is, and could they be wrong?
Does the Universe expand faster than light?
Does the Universe's expansion violate Albert Einstein’s theory of relativity, which says that the speed of light is an absolute limit?
Scientists may have got the Universe completely wrong. Here's why
NASA just made a map of the entire sky that could tell us how the Universe began
21 coolest things in space
Our pick of some of the coolest things in space that we know of.
Scientists play God and build the Universe in a computer, with mind-blowing accuracy
Cosmologists can study the Universe by building computer simulations.
It turns out some of the cornerstones of of the Universe aren't as solid as we thought. Here's why
Is teleportation possible? This is what the science says
Could human teleportation, as seen in Star Trek, ever be achieved?
Why does it take light from galaxies so long to reach us if they used to be much closer?
Could the Universe have expanded at a speed faster than light?
This is what would happen if you fell into a black hole
If you fell into a black hole, could you survive? What would happen, and what would you see?
Could Earth ever be swallowed by a black hole?
Is it possible for Earth to fall into a black hole? Should we be worried about our home planet disappearing any time soon?
Nuclear pasta explained
Strange shapes of spaghetti and other pasta types thread their way around neutron stars.
How the Hubble Space Telescope completely revolutionised what we know about the Universe
For 30 years, Hubble has revealed the secrets of our Solar System, our Galaxy and our Universe.
Interview | What happened during the first seconds of the Universe?
We spoke to astrophysicist and Fermilab scientist Professor Dan Hooper, to find out what we currently know about the first moments after the birth of the Universe.
Scientists now think we CAN know what came before the Big Bang
New theories from leading physicists offer compelling possibilities about what existed before the early Universe. One thing they’re agreed on is that the Big Bang wasn’t the start.
