For example, the radio dish on Voyager 1 in interstellar space measures 12 feet (3.7 meters) long and the Cassini Probe, which just finished her career by being crashed into Saturn, was 22 feet (6.8 meters ) long. Spacecraft are big, bulky and heavy unless they are CubeSats.
CubeSats, small satellites that are light and typically the size of a briefcase, have become more prevalent in the last few decades, especially for commercial ventures that do not have the funding for huge probes. But all these CubeSats are just circling the earth ̵
The two tiny satellites together called Mars Cube One (abbreviated to "MarCO" because of course it's called Marco) are not meant for anything too fancy. Mostly they are only started so that NASA can determine if small probes like these could even survive the journey, so they can get in touch with NASA's directly useful Mars InSight lander.
When InSight is launched to Mars to study the interior of the Red Planet – something we've never done before – MarCO will be launched on the same rocket and transported on as long as it can survive and if it does In the Martian atmosphere, they help bring InSight data back to Earth. Although their purpose is superfluous, the Mars Reconnaissance Orbiter, which is already in orbit on Mars, can do the same.
Andy Klesh, chief engineer at NASA's Jet Propulsion Laboratory, described the two satellites as "scouts." NASA press release:
"These are our scouts." CubeSats needed the intense radiation of a trip into space, or propelled to Mars, we hope to follow this path. "
It is not clear if MarCO will survive as there are many obstacles, such as restraint enough battery power to activate its solar panels for the first time, or other environmental problems that occur when new technologies are introduced into the vacuum of space
But the NASA JPL team hopes that because they have a sentimental attachment to them. The two satellites from MarCO are nicknamed "Wall-E and Eve" after the two lovable robots in Pixar Wall-E as they move forward with a compressed gas like Wall-E extinguisher
So much Good luck for MarCO when it starts. If anything happens with "Wall-E" while traveling to Mars, there will be harsh news.