There are seven planets which orbit this star, all of their orbits are much closer than Mercury's but because the star is cool and a dwarf, several of these exoplanets inhabit the 'Goldilocks Zone', and so may harbour life.
Luhe: small stars actually last much longer than medium size ones, like 'our' sun, or large ones. the truth,' the less you eat the longer you live' is true for the heavens too. so:
If you were to design a paradise planet with the longest lasting life, you would pick a cool. small star as the central furnace. unluckily, our sun is already half finished. so: by by, eternal paradise (barring a miraculous mid flight hydrogen refueling of the sun).
The solar system has a resonance, wavelength of 300 light seconds, doubling of orbit sizes,
http://www.sciforums.com/threads/orderly-spacings-of-the-trappist-1-planetary-orbits.158959/#post-3442423
"rogue planets" without a solar system."
Q: that would be a cool place, once the heat of contraction, and from radioactive internal sources is exhausted. long live our distant ( 150 0000 000 km) radiation heat source, sol, compliment of 'the father"