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View Full Version : Goldilocks Zone of a Hypergiant



wd40
2014-Nov-03, 09:23 PM
There are hypergiant stars 1700 times the diameter of the Sun ie engulfing out to Saturn. Could in theory a hypergiant star maintain life on an orbiting planet out to 1700 times the Earth-Sun distance ie could a civilization exist in a Goldilocks Zone 160 billion miles from its hypergiant sun?

galacsi
2014-Nov-03, 10:34 PM
What is really important is the brightness of the star. If it is 10,000 times brighter than the sun then the goldilock zone will be 100times farther.(Inverse sqare law)

And 100 times farther means 15 billions kilometers ! You can imagine some dozens of planets in all this space.

Too bad these giant start are so short lived ! (Or so say the mainstream theory )

Githyanki
2014-Nov-06, 08:20 PM
It took Earth a four-billion years for a civilization to emerge; large stars like those last only a million years or so. Not enough time for even planets to form before a supernova.