protosun

plural protosuns

1. Synonym of protostar.

   Synonyms: protostar

1. alternativeAlternative form of proto-Sun

   The youthful exuberance of the T-Tauri stage was thus spent after about 10 million years. The proto-Sun at that point had attained its full mass, but it still had a long way to go before it became a fully-fledged star.

   2021, Raymond T. Pierrehumbert, Planetary Systems: A Very Short Introduction

   1 more example

   The resulting contraction of the solar nebula caused most of its mass to be concentrated in the form of the protosun. The subsequent compression of the gas and dust caused the temperature of the interior of the protosun to increase. […] The contraction of the protosun until ignition of the hydrogen-fusion reaction lasted only about 30 million years. […] The resulting star then takes its place on the main sequence […].

   2007, Gunter Faure, Teresa M. Mensing, Introduction to Planetary Science: The Geological Perspective, page 52