Cosmology
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?
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?
The Great Wall is full of galaxies 15 million lightyears thick, stretching 500 million lightyears across the Universe
They say we're made of star stuff, but where does star stuff come from?
How did everything come from the deaths of stars?
A white hole is a time-reversed black hole, but could one really exist out there in the cosmos?
We've all heard of black holes. But what about white holes? Could they really exist?
Which came first: stars or galaxies?
After the Big Bang, did stars form and merge into galaxies, or did the first galaxies develop along with the first stars?
The early Universe expanded faster than light
According to Einstein, no matter can travel faster than light. So how did the early Universe expand at a rate faster than light?
7 things you need to know about the expansion of the Universe
What do we really know about the expansion of the Universe?
Does the Universe have an edge?
What is outside the Universe? Does such a question even make sense?
21 coolest things in space
Our pick of some of the coolest things in space that we know of.
Understanding what the first stars in the Universe were like will shed light on the Cosmic Dark Ages
Understanding the first stars and what came before will help astronomers solve the mystery of what the Universe was like in the Cosmic Dark Ages.
The biggest things in the Universe
Exoplanets, stars, galaxies, dark matter: a guide to the titans of the cosmos.
We asked a radio astronomer to answer 8 of the biggest, trickiest questions about the Universe
We asked a radio astronomer to address some of the biggest unanswered questions about space and the Universe.
How infrared astronomy allows us to observe the Universe beyond visible light
A guide to infrared and how it reveals the secrets of the Universe that are invisible to the human eye.
9 mind-blowing facts about the Universe
The Universe is a mind-boggling place. Here are 9 of the most astounding space discoveries of recent times.
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?
How can the Universe be bigger than its age?
How is the Universe so big, and why does its size seem to be bigger than its age?
Astronomy explained | What is Hawking radiation?
Particles appearing on the edge of a black hole could cause it to lose mass over time.
Astronomy explained | What is spacetime?
What is spacetime, and is time really all a matter of perspective?
Neutrinos could explain why the Universe didn’t just disappear after the Big Bang
Studying the fundamental particles known as neutrinos could reveal why there is any matter in the Universe at all.
Interview | How we photographed the black hole in M87
In 2019 astronomers released the first image of a black hole. But how was it done and what does the image show? We spoke to astronomer Heino Falcke to find out.
Where is all the cosmic dust?
Where is all the cosmic dust? What role does dust play throughout the Universe, and is it really being destroyed by powerful supernovae?
The main differences between Newton and Einstein gravity
Newton vs Einstein: what is the major discrepancy between their theories of gravity?
Could there have been a Universe before the Big Bang?
Is our Universe just one in an endless chain stretching into the past and future?