The mission had been designed to last only 2 Earth years
but endured the longest of any spacecraft sent to Mars.
Mars Express will continue to orbit for almost two Earth years
, using a a powerful radar to probe beneath the surface of the planet for signs of water.
Even then, it shows only a tiny portion of the planets' full orbits - which range in duration from 40 Earth years
for the nearest one to over 400 years for the farthest one.
The Mars Exploration Rovers landed in enormous Gusev Crater and on the flat Meridiani Plains more than 5 Earth years
ago (that's 2 1/2 Martian years), but despite signs of age, Spirit and Opportunity are roving still.
The images, taken by a camera aboard the Mars Global Surveyor spacecraft, provide evidence supporting earlier observations that the Red Planet's south polar cap is shrinking at a rate of about 3 meters every 2 Earth years
The Great Red Spot - a persistent and gigantic storm that has been rumbling in the gas giant's southern hemisphere for at least the past 300 Earth years
- is just one of the many defining characteristics of the planet's dense and dynamic atmosphere.
004 revolutions around the Sun every eight Earth years
But then it is more than 30 Earth years
since the Starship Enterprise cruised on to television - and Shatner is now 68.
The object, 2014 UZ224, is roughly 330 miles in diameter and takes 1,100 Earth years
to complete a single orbit.
It's extremely exciting to see such rapid changes on a body that usually changes so slowly and has a 'year' that is the equivalent of nearly 30 Earth years
," he stated.
The heaviest of the bodies, an object with a minimum mass nearly twice that of Jupiter, has an elliptical orbit and takes just over 2 Earth years
to orbit its parent star, mu Ara, in the constellation Altar.
It's been four Earth years
since the Mars rover landed on the red planet on Aug.