Here is a good Challenger site
I remember that. I still have my Astronomy Mag for that Uranus flyby.
Some good Challenger stuff here
“The crew of the space shuttle Challenger honoured us by the manner in which they lived their lives. We will never forget them, nor the last time we saw them, this morning, as they prepared for the journey and waved goodbye and 'slipped the surly bonds of earth' to 'touch the face of God.'†Ronald Reagan January 28, 1986