T Tauri stars are young, solar-like stars seen near many molecular clouds in our galaxy. We now have baby pictures of stars from conception to adolescence. The picture of the formation of the sun and planets is now a much more dynamic and energetic process than that envisioned only 20 years ago. Accretion events and flare activity has been seen in many young stars.
Most stars are either multiple or have circumstellar disks, or both.
The formation of stellar-planetary systems is now thought common place. The molecules that formed the Earth, Sun, and rest of the solar system, are found in star-forming molecular clouds everywhere.