On Thursday, December 14, 2017 at 9:54:28 PM UTC-7, RichA wrote:

Unfortunately, the 8 planet system only has one planet at a suitable "Earth"
distance from its star and that planet is probably a gas giant. The discovery
of 8 planets is probably not revolutionary, it's likely many systems exist
with the same or more planets, but resolution or motion measurements hasn't
allowed for detection.

http://www.bbc.com/news/science-environment-42356305

Maybe the Jupiter-sized planets have moons ....