HD 10180 star with 9 exoplanets to outnumber our solar system?
An alien star called HD10180 and lying approximately 127 light-years away from us, could feature a larger number of planets than our planetary system has, according to a National Geographic report.
New discovery revealed that the star HD 10180, which located in the constellation Hydrus, would see about 9 planets orbiting around, thus overcoming the 8-planet group populating our solar system.
HD 10180 triggered the first signal 2 years ago when scientist were sure about the existence of 5 planet with the possibility of 2 more to be discovered.
Illustration of the 9-planet arrangement around HD 10180 star. Credit: L. Calçada, European Southern Observatory
But, a careful analisys of information gathered over a period of more than 10 years stunned the astronomers as besides the 2 expected planets, there popped up 2 more, raising the planetary overall to 9.
Furthermore, preliminary info suggests that the last 2 planets discovered are ranked as Super-Earths, or solid state planets comparable in size to Terra.
Super-Earths possibility:
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Dimensions and arrangement:
The first 5 planets that had been confirmed in 2010 are expected to have a mass between 12- to 25 larger than Earth’s and their dimensions are comparable to those of Neptune or Uranus.
The 2 extra planets hinted also in 2010 feature masses of 65 and 1.3 Earth masses respectively. The heaviest one apparently gravitates alone outside of the main pack while the lightest is located near the HD 10180 star
Of the alleged 2 latest planets, one is believed to be 1.9 times heavier than Earth making a full orbital travel ten days, while the other planet is estimated to be 5.1 Earth masses completing its orbit in 68 days.
According to the study, the exoplanets of the most populous system are either too hot or too cold, therefore they are less likely to be located in a habitable zone – a spatial area around the host star where planets feature life-supporting/hosting conditions.
If HD10180’s system is officially confirmed it would become a record-breaking most populated planetary world known to date, therefore our Sun won’t top the rank anymore.