“Young star offers a glimpse of the Sun’s past” – interesting news story from NASA/ESA at http://www.esa.int/spaceinimages/Images/2016/06/Young_star_offers_a_glimpse_of_the_Sun_s_past
“… Located 1800 light-years away in the constellation Cygnus, V1331 Cyg… may look like a star, it may be called a star, but it does not yet generate energy like a normal star. This is because this star is still being formed.”
This is a good example of how we think the Sun formed 4.6 billion years ago – fascinating!