A protoplanetary disc is a swirling disk of gas and dust that surrounds a young star. This disc is the birthplace of planets and other celestial bodies in a developing solar system. Full definition
In combination with the study of protoplanetary discs around young stars, many of the details of the processes that led to the formation of the Earth and the Solar System about 4600 million years ago will be unveiled. (sciencedaily.com)
We knew that something like this must be occurring in protoplanetary discs but there's a big difference between having theoretical models and having the high - quality observations to test those theories. (jodrellbank.net)
The organic molecule methyl alcohol (methanol) has been found by the Atacama Large Millimeter / Submillimeter Array (ALMA) in the TW Hydrae protoplanetary disc. (alma-telescope.jp)