一、The Formation Of Gas Planets托福听力原文： NARRATOR:Listen to part of a lecture in an astronomy class. MALE PROFESSOR:Last week we discussed the formation of Earth and the other rocky planets—the planets ...

SYDNEY, June 2 (Xinhua) -- Astronomers have detected silicon monoxide gas in the atmosphere of a planet 850 lightyears from Earth, the first time the gas has ever been observed on any planet, ...