Astronomers discover exoplanet where a year lasts four-and-a-half hours
The Earth-sized exoplanet is in a high-speed orbit around its star.
Known as EPIC 228813918 b, the exoplanet orbits the m-dwarf star in less than four and a half hours, making one day the equivalent of more than five years.
"We report the discovery from K2 of a transiting terrestrial planet in an ultra-short-period orbit around an M3-dwarf," reads the paper in which the findings were presented. "EPIC 228813918 b completes an orbit in only 4.3 hours, the second-shortest orbital period of any known planet, just 4 minutes longer than that of KOI 1843.03, which also orbits an M-dwarf."
The findings were submitted to the Monthly Notices of the Royal Astronomical Society from a group of scientists using NASA's Kepler Space Telescope.
The average human life span is 79 years on Earth, which would make the average lifespan on EPIC 228813918 b about 150,000 years.
Finding exoplanets with short revolution patterns around a star is not uncommon.
In 2013, scientists found an Earth-sized "lava planet" that had an 8.5 hour year, known as Kepler-78b.