"Alexander wept when he heard from Anaxarchus that there was an infinite number of worlds; and his friends asking him if any accident had befallen him, he returns this answer: 'Do you not think it a matter worthy of lamentation that when there is such a vast multitude of them, we have not yet conquered one?'" -- Plutarch, historian, 1st century
"... there are more worlds, and on them more creatures of beauty to be found." -- Immanuel Kant, natural philosopher, 1764
"... there are inhabitants in other worlds." -- Immanuel Kant, natural philosopher, 1781
Lamassu or Shedu are centauroids. Centauroids were (are?) from Alpha Centauri.
The yellow main sequence star Alpha Centauri is 4.365 light years from the Earth.
Nearest Star System Might Harbor Earth Twin.
University of California, Santa Cruz graduate student Javiera Guedes used computer simulations of planet formation to show that terrestrial planets are likely to have formed around one of the stars in the Alpha Centauri star system, our closest stellar neighbors.
Guedes' model showed planets forming around the star Alpha Centauri B (its sister star, Proxima Centauri, is actually our nearest neighbor) in what is called the "habitable zone," or the region around a star where liquid water can exist on a planet's surface.
The model also showed that if such planets do in fact exist, we should be able to see them with a dedicated telescope.
"If they exist, we can observe them," Guedes said.
Guedes' study has been accepted for publication in the Astrophysical Journal.
A likely candidate
Astronomers have for some time pinned the Alpha Centauri system as one that was likely to form planets, said study co-author Gregory Laughlin, a UCSC professor.
"I think that there's been a good line of evidence over the past decade or so," Laughlin told SPACE.com.
Several factors mark the system, particularly Alpha Centauri B as friendly to planet formation, Laughlin said. The metallicity of Alpha Centauri B (or how much of its matter is made up of elements heavier than hydrogen and helium) is higher than our Sun's, so there would be plenty of heavier-mass material for planets to form from, he said.
Also, because the planet iwould form in a triple star system, the processes that form large Jupiter-mass gas giants, which account for most of the extrasolar planets found so far, would be suppressed. So it would be more likely for the system to produce terrestrial planets.
Laughlin also noted that a number of factors make Alpha Centauri B a good candidate for astronomers to actually detect an Earth-sized terrestrial planet.