The standard explanation has been dark energy, an invisible force added into the equations to make the math work. But now, an ...

Scientists propose a new gravity theory using Friedmann equations. Their model explains the universe’s accelerating expansion ...

The accelerating expansion of the universe is usually explained by an invisible force known as dark energy. But a new study ...

The rapid acceleration of the universe’s expansion continues to challenge our understanding of fundamental physics. Why the ...

Why the universe is expanding faster and faster remains one of the biggest open questions in physics. Current theories cannot ...

(via Science Asylum) Believe it not, Einstein originally thought the universe was static. It would take Alexander Friedmann to correct him. Here are the Friedmann equations, explained simply.

“The equation is called the Friedmann equation and, simply put, governs the expansion of space in a homogenous universe such as our own. In the 1920s Alexander Friedmann, a Russian astrophysicist, ...

I'm studying for my Qual (12 days to go and counting), and currently slogging through cosmology. Something that was never explained to my satisfaction earlier is how inflation resolves the fine tuning ...