A protostar is the early stage of becoming a star. They are also known as young stars. A protostar will last from at least 100,000 years to 10 milion years. before becoming a star. The protostars do not really have a specified distance away from the sun because stars are all around the place not just in one spot. Humans can not live on a protostar because it has no land. It is just a ball of gas that provides light to the earth from space. Protostars at a young stage will have a lot of dust covering it. Prototstars are really particles and dust which begin to form into stars after a time period. It is difficult to locate a protostar even with the use of the famous "Hubble Space Telescope", this is because Protostars are located within large clouds of gas. A Protostar's life is dependant on that of the mass of the Protostar. Protostars are hotter than the gas it comes from however it is much cooler than ordinary stars in the universe. Protostars form from the initial gas cloud of a nebula. Nebulae are the beginning of a stars life. As a Protostar is the early stage of a star it would be completely impossible for us to ever sustain life on one. Also in their later development it would be as well. For the matter we would not be able to reach one and if we cannot sustain life on the sun, then their is no chance of ever sustaining life on any other star.
Protostar
A protostar is the early stage of becoming a star. They are also known as young stars. A protostar will last from at least 100,000 years to 10 milion years. before becoming a star. The protostars do not really have a specified distance away from the sun because stars are all around the place not just in one spot. Humans can not live on a protostar because it has no land. It is just a ball of gas that provides light to the earth from space. Protostars at a young stage will have a lot of dust covering it. Prototstars are really particles and dust which begin to form into stars after a time period. It is difficult to locate a protostar even with the use of the famous "Hubble Space Telescope", this is because Protostars are located within large clouds of
Resources:
http://sunshine.chpc.utah.edu/labs/star_life/support/protostar.html
http://zebu.uoregon.edu/~imamura/208/feb15/feb15.html
http://www.daviddarling.info/encyclopedia/P/protostar.html
http://www.space-art.co.uk/pages-en/stars-I/Protostar.htm