Simplify the following text for a Grade 10 native English-speaking person.
Original: Courage , a very small and dim arc during the Voyager flyby , was seen to flare in brightness in 1998 , while more recently it was back to its usual dimness but had advanced by an additional 8 Â ahead of the other arcs .
Simplified: Courage , a very faint arc found during the Voyager flyby , was seen to flare in brightness in 1998 , while more recently it was back to its usual dimness .