Sunday, March 16, 2014




An Aurora on Saturn

This is an image from the Cassini spacecraft reminding us that the solar wind stretches far out beyond the Earth.  Here it's interacting with the magnetic fields at Saturn and generating this beautiful auroral ring, captured here in non-optical light.

Thursday, March 06, 2014

ESOcast 63: Flexible Giants — The Evolution of Telescope Mirrors





ESOcast 63: Flexible Giants — The Evolution of Telescope Mirrors Scopes are giant light buckets and you need big mirrors to collect and direct the light to a focal point.  How big you ask?