Cosmology
21 coolest things in space
Our pick of some of the coolest things in space that we know of.
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?
When we look at the night sky, we're looking back in time. This is how far back we can see
The time it takes for light from objects in space to reach Earth means that when we look at planets, stars and galaxies, we're actually peering back in time.
Here's how James Webb Space Telescope could help astronomers nail down the rate of expansion of the Universe
JWST could be crucial in resolving differences in the measurement of the Hubble Constant.
How old is the Universe?
How do astronomers estimate how old the Universe is, and could they be wrong?
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.
5 things you always wanted to know about the Big Bang theory and the birth of our Universe
Want to know more about the Big Bang? Here are some of our favourite FAQs concerning the beginning of the Universe.
How astronomers can observe the afterglow of the Big Bang
Can we really still see the light from the creation of the Universe? How does it help us understand the cosmos as we see it today?
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?
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.
How did the first stars affect the evolution of the Universe?
Astronomers are understanding more how the first stars that ignited influenced how galaxies grew for generations after their explosive deaths.
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?