For an observer on Io, the closest large moon to the planet, Jupiter's apparent diameter would be about 20° (38 times the visible diameter of our Moon, covering 1% of Io's sky). An observer on Metis, the innermost moon, would see Jupiter's apparent diameter increased to 68° (130 times the visible diameter of our Moon, covering 18% of Metis' sky). A "full Jupiter" over Metis shines with about 4% of the Sun's brightness
1%阳光看来有点悬,阿凡达的设定行星应该比木星小吧,然后卫星也决无可能接近到木卫五那样的程度,甚至可能比木卫一还远 |