07-24-2020, 11:09 PM
(07-24-2020, 10:07 PM)guohua Wrote:(07-24-2020, 05:31 PM)argentus Wrote:(07-24-2020, 05:24 PM)F2d5thCav Wrote: Yeah, given the distance of the system in the article, that is the way those planets looked in our year 1710 . . . that is a LONG way.
Cheers
Yes, and this star is apparently thought to be a very young one, according to the article. 17 million years old! pffffft! A toddler sun. Merely 310 LY away. Practically next door!
So young, just think of an Earth Like planet near that Star, where would it be in its evolution?
Volcanic activity or life?
Probably still cooling down from the molten globule stage, and way too hot for any organisms to survive. Earth is supposed to be 4.5 billion years old, but the oldest evidence of life is between 3.9 and 3.7 billion years old, meaning that Earth had to cool for around 700 million years at the lower limit before life could start to form.
So, depending on it's size and bulk, an exoplanet will takke a little less time or a little more, but if it is Earth sized, we can anticipate at least a 700 million year cooling off period.
.
Diogenes was eating bread and lentils for supper. He was seen by the philosopher Aristippus, who lived comfortably by flattering the king.
Said Aristippus, ‘If you would learn to be subservient to the king you would not have to live on lentils.’ Said Diogenes, ‘Learn to live on lentils and you will not have to be subservient to the king.’
Said Aristippus, ‘If you would learn to be subservient to the king you would not have to live on lentils.’ Said Diogenes, ‘Learn to live on lentils and you will not have to be subservient to the king.’