A ==Key Stage 3=====Meaning===An [[asteroid]] is a lump of [[rock]] which [[orbit]]s a [[star]] but is too small to become round in shape so it is not called a [[planet]] or [[Dwarf Planet|dwarf planet]].==Key Stage 4=====Meaning===An [[asteroid]] is a lump of [[rock]] that which [[orbitsorbit]] s a [[star]] but is too small to become round in shape so it is not called a [[planet]] or [[Dwarf Planet|dwarf planet]]. ===References=======Edexcel====:[https://www.amazon.co.uk/gp/product/1292120223/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1292120223&linkCode=as2&tag=nrjc-21&linkId=068ecf40278c32406a7f1c6e66751417 ''Asteroids, page 118, GCSE Physics, Pearson Edexcel '']:[https://www.amazon.co.uk/gp/product/1782948163/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782948163&linkCode=as2&tag=nrjc-21&linkId=0fdbfd5dd397d6e24a9dfb250f08587f ''Asteroids, page 184, GCSE Physics, CGP, Edexcel '']