Goldilocks planet just right for life
Cheung Chun Ho 6B (6)
I have read a news about that astronomers have detected an Earth-like exoplanet that may have just the right kind of conditions to support life. The planet is called "Gliese 581g",it lies some 20 light-years away in its star’s "Goldilocks zone"- a zone in space where temperatures are neither too hot nor too cold for liquid water. Such a zone defines the region in a star-centered orbit where an Earth-like planet could sustain that water on its surface – and therefore life.
Gliese 581g has a mass about three to four times that of Earth. It orbits its sun in 37 days and is thought to be a rocky world. Scientists say that it has enough gravity to possibly have an atmosphere. But unlike Earth, this alien world has one side always facing its sun and the other side constantly in the dark. So in-between the two sides, between shadow and light, there could be an area where life could potentially thrive.
I was surprised when I read the news since it shows that there is another planet which can also sustain life just like the Earth, which telling us, we-including all the organisms on Earth, are not the only life in the universe. Although the planet is not as perfect as our Earth, and the life on it may just can be some micro-organisms, it is still a amazing discovery.