Prostars can refer to a cartoon series or other things. The cartoon series, of course, has different episodes, so they are different. Prostar football figurines are figurines of different football players.
All stars are formed from protostars.
Protostars was created in 1971.
Protostars has 271 pages.
The ISBN of Protostars is 0-345-02393-5.
Not all protostars become true stars. Some protostars may not have enough mass to sustain nuclear fusion in their cores and never become true stars, instead becoming failed stars known as brown dwarfs.
Protostars
Protostars are the beggining of stars
small nebulae that fluctuate in brightness
Gravitational force is what causes protostars to form. Gravity pulls together gas and dust in a molecular cloud, causing it to clump and collapse, eventually leading to the formation of a protostar.
Clouds of gas and dust, called nebulas and then form into protostars.
If you can see it, its a star. Protostars radiate only in the infrared.
The Wikipedia article mentions CARMA-7 and HBC-1 as examples.