Faster-than-Light Galaxies and the Cosmic Magnifying Lens

My two latest posts at Degrees of Freedom describe how the universe acts as a giant magnifying lens, so that very distant galaxies appear larger in the sky than closer ones, in a reversal of the usual laws of perspective.

The Cosmic Magnifying Lens describes the phenomenon (check out the videos!), and

A Step-by-Step Guide to Cosmology’s Best-Kept Secret explains the physics behind it, which has to do with stuff receding from us faster than the speed of light. Because of the expansion of the universe, distant objects can indeed be superluminal.


Leave a Reply

Fill in your details below or click an icon to log in: Logo

You are commenting using your account. Log Out /  Change )

Google+ photo

You are commenting using your Google+ account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )


Connecting to %s