![]() Now it will serve as a cautionary tale for planet hunters, a reminder that planets as small as Earth are hard to find. It would have been roughly a tenth the distance to its star that Mercury is to the sun, with a scorchingly hot surface probably covered in molten rock. This particular alien world wouldn't have been a good place to look for life, though. The discovery got people excited about finding neighboring worlds that might harbor life in the Alpha Centauri system 4.3 light-years away-already home to science fiction characters such as the Transformers and the creatures of Avatar. The planet, thought to be perhaps similar in mass to Earth, was hailed as a “landmark” when it was announced in 2012 in the journal Nature. According to a new study, Alpha Centauri Bb, a world in the nearest star system to us, was merely a ghost in the data.
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