In addition, future analyses might include more items on relationship quality to more fully. approach the construct of relationship happiness. 22 Also, with longitudinal data it is possible to examine. the association between parental relationship quality and child outcomes over time.
A rover (or sometimes planetary rover) is a space exploration vehicle designed to move across the surface of a planet or other celestial body. Some rovers have been designed to transport members of a human spaceflight crew; others have been partially or fully autonomous robots.
Mars rover is a motor vehicle that was designed and built by NASA scientists. It was operated by robots and launched into Mars. Till now five Mars rovers have been launched: 1. In 1971, the first one named Mars 2, Prop M rover was launched into Mars but it failed. 2. After that Mars 3, Prop M rover was launched but that device also failed. 3. On 4th July 1997, the third Mars rover-Sojourner rover landed successfully on Mars and until 27th September 1997 it was able to maintain communications with NASA. 4. On 4th January 2004, Spirit (MER-A), Mars Exploration Rover was launched successfully. There has been no communication from the rover since 22nd March 2010. 5. On 25th January 2004, the fifth rover named Opportunity (MER-B), Mars Exploration Rover, made it to Mars successfully and is still operating.