<Li> MWC 349 was first discovered in 1978, and is estimated to be only 1,000 years old . </Li> <Li> VLA 1623--The first exemplar Class 0 protostar, a type of embedded protostar that has yet to accrete the majority of its mass . Found in 1993, is possibly younger than 10,000 years . </Li> <Li> L1014--An extremely faint embedded object representative of a new class of sources that are only now being detected with the newest telescopes . Their status is still undetermined, they could be the youngest low - mass Class 0 protostars yet seen or even very low - mass evolved objects (like a brown dwarf or even an interstellar planet). </Li> <Li> IRS 8 *--The youngest known main sequence star in the Galactic Center region, discovered in August 2006 . It is estimated to be 3.5 million years old . </Li>

What two factors are key in forming planets and stars