伽利略證實不同重量的物體落下的速度相同。
Galileo demonstrated that objects of different weights fall at the same speed.
卡利斯托衛星木星最亮的四顆衛星之一，是距木星第六遠的衛星。最初為伽利略所發現，它是最大的行星衛星
One of the four brightest satellites of Jupiter and the sixth in distance from the planet. Originally sighted by Galileo, it is the largest planetary satellite.
伽利略在世之日一直是激烈的論戰中心。
In his own lifetime Galileo was the centre of the controversy.
對伽利略來說，地球上和太空中有不同的運動法則是沒有多大意義。
It didn't make much sense to Galileo to have different rules for motion on earth and in space.
