The first is a pair of planets, each about the mass of Jupiter, that whirl around their home star 15 light years from Earth in perfect lockstep.
第一个是一对质量与木星差不多的行星，这对行星步调一致地围绕距离地球15光年的母恒星旋转。
Planets are believed to emerge from the accretion of particles in a disk of gas and dust as they whirl around the star.
行星被认为是由围绕恒星旋转的气体和尘埃组成的圆盘中的粒子累积而成。
It takes the planet only 88 days to whirl around the sun, though, so a Mercurian day lasts about three-quarters of the Mercurian year.
水星绕太阳公转一圈仅需88天，所以火星上一天相当于水星一年的3/4。
应用推荐