Scientists of the Max Planck Institute for Astronomy discovered a planet that orbits TW Hydrae, a star only 8 to 10 million years old and still surrounded by a circumstellar disk. The planet, dubbed TW Hydrae b after its mother star, is the youngest planet currently known to the scientific world. The planet has nearly 10 times the mass of our Jupiter; and it planet orbits the star with a period of 3.56 days at a distance of about four million miles, inside the inner rim of the system's dusty disc. Details of the discovery appear in Nature, Jan. 3.