Beagle 2 of Mars
(text from Wikipedia)
Beagle 2 is a British landing spacecraft that formed part of the European Space Agency’s 2003 Mars Express mission. Beagle 2 is named after HMS Beagle.
The spacecraft was successfully deployed from the Mars Express on 19 December 2003 and was scheduled to land on the surface of Mars on 25 December; however, no contact was received at the expected time of landing on Mars, with the ESA declaring the mission lost in February 2004, after numerous attempts to contact the spacecraft were made.
The spacecraft’s fate remained a mystery until it was announced in January 2015 that Beagle 2 had been located intact on the surface of Mars in a series of images from NASA’s Mars Reconnaissance Orbiter HiRISE instrument. The images suggest that two of the spacecraft’s four solar panels failed to deploy, blocking the spacecraft’s communications antenna.