The Apple App Store allows you to upload four screenshots while Google Play accepts up to eight. Make sure to use all of them. Screenshots, app promos and walkthrough videos are prime real estate in any app store description. Including compelling imagery and screenshots that sum up an app's key features can make the difference between a download and a swift tap of the X button.
Mars Pathfinder was launched on December 4, 1996, and landed on Mars seven months later, on July 4, 1997.   Launched in 1996 by NASA, Pathfinder descended to the Martian suâ¦rface in July 1997 using parachutes, rockets, and air bags. 1 person found this useful.
A Rover's Playground. With a top speed of only 1.5 inches per second on flat, hard ground, Curiosity needs a landing spot on Mars that doesn't require it to travel long distances to do its most important investigations. It took five years and 150 Mars scientists to narrow down a landing site from 60 possibilities.