Astronomers have observed an exoplanet orbiting a star in just over 18 hours – the shortest orbital period ever seen for a planet of its type. Most eccentric orbit: HD 20782 b: HD 20782: 0.956 ± 0.004: Record among confirmed planets. 1 2. Mercury has the shortest orbit of all the planets because it is the closest planet to the Sun. Shortest orbital period (Shortest year) SWIFT J1756.9-2508 b: SWIFT J1756.9-2508: 48 minutes, 56.5 seconds: K2-137b has the shortest orbit around a main-sequence star (an M dwarf) at 4.31 hours. Mars: Planet Mars goes around the sun once every 686.98 earth days.

Putative satellite of VB 10 may have higher eccentricity of 0.98. Mercury is the closest planet, therefore it has the shortest orbit time. Artist’s impression of a hot Jupiter orbiting close to … This would make a 15 year old from earth be barely over 1 year old in Jupiter years. Earth: One year on planet Earth, or one orbit around the sun, takes 365.26 days. The precise amount of time in Earth days it takes for each planet to complete its orbit can be seen below. Mercury: 87.97 days (0.2 years) Venus : 224.70 days (0.6 years) Earth: 365.26 days (1 year) Mars: 686.98 days (1.9 years) Jupiter: 4,332.82 days (11.9 years)

Hence, a 15 years old from Earth would actually be almost 8 years old in Mars years. 4. Jupiter: The planet Jupiter travels around the sun one time every 4,332.82 earth days. 5. Eddie Gonzales Jr. – MessageToEagle.com – An exoplanet orbiting a star in just over 18 hours, the shortest orbital period ever observed for a planet of its type, report astronomers from the University of Warwick.