What structures observed around young stars confirm the nebular disk formation environment?
Proplyds
A powerful confirmation of the fundamental environmental requirements of the nebular hypothesis comes from direct astrophysical observation in current star-forming regions. Astronomers observe young stars that are still surrounded by the remnants of their formation cloud. These observable structures, which are essentially spinning disks of gas and dust around the newly formed star, are known as proplyds. Their existence, notably observed in areas like the Orion Nebula, provides tangible, real-time evidence that the prerequisite condition for solar system formation—a spinning disk of raw material—is a common and active phenomenon throughout the galaxy, lending strong support to applying the same model to our own Solar System's history.
