Tag: Planck

Cosmic inflation appears to have shifted from settled science back to speculation

You can get background on what I'm talking about in this post here and here. Probably the best thing to do is let the experts weigh in on this. https://twitter.com/DavidSpergel/status/513848952513642497 https://twitter.com/seanmcarroll/status/513858867327823873 https://twitter.com/seanmcarroll/status/513869684647530496 https://twitter.com/AstroKatie/status/514040997139865600 It's interesting to note that the empirical evidence from BICEP2 has never been called into question, only the interpretation of that evidence. … Continue reading Cosmic inflation appears to have shifted from settled science back to speculation →

Where is the Earth located?

http://www.youtube.com/watch?v=8_l8CxIieVQ I enjoyed this video, but I wonder about Fraser's statement that cosmologists think if you travel in one direction long enough you'll eventually end up back where you are.  That is one model, but not the only one.  It depends on space being curved, and tests currently show it to be flat. Of course, … Continue reading Where is the Earth located? →