The Planck Satellite Discovers Extra Dark Matter In the Universe

This week, the Planck Satellite team announced major findings from over a year of observations of the Cosmic Microwave Background (CMB), or the radioactive sludge that lingers in our universe from the beginning of time, right after the Big Bang. And while there's a lot to digest, I wanted to give you some high… » 3/22/13 7:00am 3/22/13 7:00am

The existence of helium is evidence for the Big Bang

When people talk about evidence for the Big Bang, they're most likely to point to the Cosmic Microwave Background. But there's another major piece of evidence that the Big Bang happened, and it involves the element that makes your voice squeaky. This is the story of how helium can show that the universe had a definite… » 8/13/12 11:04am 8/13/12 11:04am

Astronomers may have discovered the oldest galaxy in the Universe

A team of Japanese astronomers claims to have used the Subaru and Keck telescopes at Hawaii's Mauna Kea, pictured above, to observe a galaxy 12.91 billion light years from Earth. If their findings are correct (and the majority of astronomers thus far agree they are), it could well be the oldest galaxy ever discovered. » 6/13/12 2:40pm 6/13/12 2:40pm

This could be our best view yet of the earliest objects in the Universe

NASA researchers have detected the faint glow of what they believe to be the first stars and galaxies to form in the aftermath of the Big Bang — and it's positively stunning. If the team's findings are correct, they could offer valuable insight into the nature of the Universe's very first objects. » 6/08/12 11:40am 6/08/12 11:40am

What happened before the Big Bang?

We spend a lot of time thinking about futurism, but the past is pretty interesting, too. In this week's "Ask a Physicist" we get extra speculative and think about what things may have been like before the beginning of time. What was there before the Big Bang? Did anything exist before our current universe? Here's what… » 2/02/12 12:23pm 2/02/12 12:23pm