The Hubble Space Telescope is currently in safe mode while technicians at NASA figure out what has gone wrong with a gyroscope that was found to be not performing properly. Hopefully it's an easy fix and Hubble will be back to full operations soon.
How we are understanding more about the stuff surrounding stars
We are getting a better and better at understanding how planetary systems are formed. This article tracks the historic development of the heliocentric model and how that relates to understanding the formation of our own Solar System.