Hello Helen,
Welcome to Ice In Space!
I’m uncertain what your daughter may have seen, but a good candidate is a meteorite. Here is a link to some information that may be of interest.
http://www.space.com/spacewatch/myst...ay_040419.html
I understand that most man-made space junk is tracked by various Government Agencies and from memory, the re-entry of a significant piece of space debris is usually picked up by the media.
Cheers
Dennis