matter
How Much Stuff is in a Light Year?
Determining how much stuff is a single light year is daunting, considering how big the Milky Way is. But doing…
What are Molecules?
Molecules are the basic buildings blocks of life and matter, and our understanding of them has evolved considerably over time.
Earth May Be “Hairy” with Dark Matter
I'm losing mine, but the Solar System may be way hairier than we ever thought, with thick crops of filamentary dark matter…
How Massive Can Black Holes Get?
We talk about stellar mass and supermassive black holes. What are the limits? How massive can these things get? Without…
Could We Make Artificial Gravity?
It's a staple of scifi, and a requirement if we're going to travel long-term in space. Will we ever develop…
Astronomy Cast Ep. 383: Approaches to Absolute Zero
The coldest possible theoretical temperature is Absolute Zero, this is the point at which no further energy can be extracted…
Astronomy Cast Ep. 382: Degenerate Matter
In some of the most extreme objects in the Universe, white dwarfs and neutron stars, matter gets strange, transforming into…
Is There a Mirror Universe?
Could there be a mirror universe, where everything is backwards - and everybody has goatees? How badly do you need…
How are Energy and Matter the Same?
As Einstein showed us, light and matter and just aspects of the same thing. Matter is just frozen light. And…
Where’s All The Antimatter?
One of the biggest mysteries in the Universe is the fact there there's matter, and not antimatter. Where did it…