This system

This system consists of a single white F4 star with 14 planets in orbit. The central star has 1.8 solar masses, a mean surface temperature of 6894 K and a luminosity of 3.68 solar luminosities. The first nine planets are unusually close to the central star but the outermost two are remote and gravitationally loosely bound. The inner planets have most likely undergone a migration towards the central star, into closer orbits perhaps due to efficient transport of angular momentum to planetesimals ejected from the system. Planets 13 and 14, on the other hand, appear to have migrated outwards by gaining angular momentum.

The most habitable world in this star system is predicted to be the 6th planet, S67-6M, a medium-class planet with 3 moons. An anomalous energy reading was obtained during scans, a momentary blip in neutrino emissions from a position 58o43'38''N, 12o23'05''E on or below the planet's surface. This planet has a thick atmosphere and a 111.7 hour day. The surface gravity is 0.86, since despite its relatively large mass this planet has a low density, having a low abundance of heavy elements. Remarkably, the planet's surface has a amicable mean surface temperature of 25.9 C. The world is, however, appears devoid of life despite being apparently suitable for life. Perhaps intense radiation from its proximity to its luminous star has kept the planet sterile, or it may have suffered some other catastrophe in recent geological times. There is little water, carbon dioxide or oxygen in the planet's atmosphere, perhaps indicating the loss of outer atmospheric layers. The atmosphere is currently composed almost entirely of argon. The planet is quite old, as its parent star is nearing the end of its 5 billion year life-span and in a few thousand years is expected to ignite helium around its core and expand into a red giant predicted to engulf the innermost 11 planets and destroy them.

The relatively low temperature of S67-6M, despite its proximity to its parent star, is at least due to low internal heat as the planet apparently contains very few radioactive isotopes. the planet undoubtedly formed from a nebula poor in metals which was not seeded directly by any nearby supernova. The initial trigger that enabled the nebula to exceed the critical Jeans density for contraction is unknown.

Recommendation: send a landing party, equipped with biosuites, to S67-6M to investigate the neutrino anomaly.


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