求翻译：一颗行星是否能够维持生命取决于它的恒星——它的太阳。设想一下，有这么一颗恒星，它的大小、亮度和热度都是太阳的20倍，那么一颗行星为了维持生命就要离它的恒星非常远。但是，现在没有一台现存的望远镜可以发现生命的存在。而开发这样一台望远镜将会是21世纪天文学的一个重要的研究课题。是什么意思？

Whether a planet can support life depends on its star - the sun. Imagine such a star 20 times its size, brightness, and heat are the sun, a planet to sustain life is necessary from its star very far. However, there is no existing telescope can be found in the existence of life. The development of su

A planet is to be able to maintain life depend on it - it's stars of the sun. Imagine for a moment, there is a star, and it's size, brightness and heat of the sun is 20 times, then a planet to sustain life is from the stars are very far from it. However, there is no one existing telescopes can be fo

Whether a planet can maintain the life to be decided by its star - - its sun.Conceives, has such a star, its size, brightness and the heat degree all are sun's 20 times, then a planet in order to maintain the life to have to leave its star to be extremely far.But, an extant telescope has not been po

A planet can sustain life depends on its star--the Sun. Imagine there is a star, its size, brightness and heat are 20 times times the Sun, then a planet in order to sustain life is very far away from its star. However, there is no existing telescope can discover the existence of life. And the develo

0a planet that can sustain life depends on it - it's stars of the sun. Imagine for a moment, there is a star, and it's size, brightness and heat of the sun is 20 times, then a planet to sustain life is from the stars are very far from it. However, there is no one existing telescopes can be found the