Tag Archives: cosmology

Carne, Pisco and a Conference in Chile

ESO_satelites-poster-lowres-v5

With Steffen Mieske I’m currently organizing a conference called “Satellites and Streams in Santiago”, which will take place in April 2015 in Santiago de Chile. I’m very excited about this meeting, as the topic will be (as the name suggests) streams and satellites, and there hasn’t been a similar gathering of experts in these fields in more than a decade. With about 100 people, we will focus for one week on dwarf galaxies and globular clusters, which orbit around the Milky Way and nearby galaxies, as well as tidal streams, which these satellites produce while orbiting and dissolving in their host galaxy’s gravitational potential. Aim of the meeting is to bring the two communities together to create the big picture of how large galaxies like the Milky Way assemble mass over billions of years by eating smaller satellites and globular clusters, and how the gravitational fields of the host galaxies transform satellites with time.  Continue reading Carne, Pisco and a Conference in Chile

The BICEP2 CMB Telescope at the South Pole
The BICEP2 CMB Telescope at the South Pole

It’s not every day you wake up and learn something completely new about the Universe when it was a trillionth of a trillionth of a trillionth of a second old!

Marc Kamionkowski at the BICEP2 press conference at Harvard’s CfA.

If gravity were not quantized, inflation would not produce gravitational waves. So we really are seeing a direct effect caused by the quantization of gravity, and it is the first time we’ve seen anything like that.

Alan Guth, inventor of the inflation idea, commenting on the BICEP2 measurements in an article in NewScientist.