Nine Exoplanets Discovered in Solar System’s ‘Twin’
by Ian O’Neill
In 2010, a star 127 light-years away stunned the world — it had become the largest star system beyond our own, playing host to five, possibly seven, alien worlds. Now, the star (called HD 10180) is back in the headlines; it may actually have nine exoplanets orbiting it.
Interestingly, HD 10180 is a yellow dwarf star very much like the sun, so this discovery has drawn many parallels with our own Solar System. It is a multi-planetary system surrounding a sun-like star. But it is also a very alien place with an assortment of worlds spread over wildly different orbits.
It is believed that one of HD 10180’s exoplanets is small — although astronomers only know the planets’ masses, not their physical size or composition. The smallest world weighs-in at 1.4 times the mass of Earth, making it a “super-Earth.”