Hungarian research results published by NASA

NASA has published the research results of a Hungarian team of astronomers from the Hungarian Academy of Sciences and the Eötvös Loránd University. The study was posted on NASA’s homepage as well as the JPL’s website on exoplanets, 444.hu reports.

The team, led by András Pál, studied the dwarf planet 2007 OR10, the largest known body in the Solar System that does not have an official name. They used data from the Kepler and Herschel space observatories and discovered that the dwarf planet is much larger than originally thought.

The Kepler space telescope was designed to study exoplanets – planets that orbit a star other than the Sun – but it has proven useful in every field of astrophysics. In 2014, it measured the changes in brightness on the OR10 dwarf planet continuously for two weeks. By studying the light and dark features of the surface the scientists determined that the planet takes almost 2 days to complete a spin around its axis. This is surprisingly long compared to the other dwarf planets, which complete their spin in just 6-12 hours.

Planets and dwarf planets only reflect a portion of sunlight on a visible wavelength, the other portion is absorbed and sent back out as heat. This was observed in infrared by the Herschel Space Observatory. The ratio of reflected and absorbed light indicates whether the planet is small and bright or big and dark. The Herschel and Kepler data combined, scientists found the latter to be true for the 2007 OR10.