In this task, we ask you to elaborate the sentence without changing its general meaning. You can do so by explaining further the input sentence, using more precise wording, adding qualifiers and auxiliary information etc.

Ca-Al-rich inclusions – the oldest known solid bits in meteorites formed within the solar system – are 4.567 billion years old .
Calcium – aluminium-rich inclusions — the oldest known solid constituents within meteorites that are formed within the Solar System — are 4.567 billion years old , giving a lower limit for the age of the Solar System .