Stars get warmer as they age, which means there was a time when our Sun was too cool to liquify water on Earth. But the evidence is clear water existed on Earth for much longer. What gives?
Nothing can be colder than absolute zero, or can it? Arthur Eddington wrestles with the paradox of stellar thermodynamics.
In an infinite and ageless cosmos, how is it possible that the Universe is cold, dark and dominated by gravity?
What happens when one set of evidence contradicts another set of evidence?
A grism lets astronomers study the colors of starlight.
The combination of science and art can create wonders.
Astrophysics has some pretty amazing things to say about you.
Perhaps we should focus our SETI efforts on stars that could see Earth transit the Sun. It’s an interesting idea that’s worth considering.
It’s leap day, which means lovers of February get to enjoy it just a little bit longer.