![]() ![]() The study, published this week in Astrophysical Journal, predicted the presence of a small exoplanet perturbing an inner planet (already known), producing changes on its orbit. For this reason, a full day on the new planet would take four planetary years, or roughly 22 Earth days. On the new planet these two periods do not coincide, since the orbital translation period and the rotation period are very similar. ![]() On Earth, a full day coincides quite closely with the rotation period. Simulations show that the exoplanet, dubbed GJ 436c, orbits its host star, GJ 436, in only 5.2 Earth days, and is thought to complete a revolution in 4.2 Earth days, compared to Earth’s revolution of 24 hours and full orbit of 365 days. The team of astronomers from the Spanish Research Council (CSIC) working with Jean-Philippe Beaulieu, a visiting astrophysicist at UCL, made the discovery from model predictions of a new exoplanet — planet outside our solar system — orbiting a star in the constellation Leo. One full day on the new planet would be equivalent to three weeks on Earth. The new planet, which lies at a distance of 30 light-years from Earth, has a mass five times that of our planet but is the smallest found to date. Spanish and UCL (University College London) scientists have discovered a possible terrestrial-type planet orbiting a star in the constellation Leo. ![]()
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