NASA's Ingenuity helicopter on Mars has exceeded everyone's expectations, recently completing its 51st flight when it was supposed to fly just a few times as a demonstration mission. But flights 50 and 51 almost didn't happen.

In a recent blog post, Travis Brown, Chief Engineer for Ingenuity shared how the team lost contact with the tiny rotorcraft for six excruciating days.

At first, they were not overly concerned when communications ceased from the helicopter on Sol 755. About a year ago, a brief two-day communication glitch occurred because Ingenuity experienced insufficient battery charge as night fell at the start of the Martian winter. This reduced voltage reset the mission clock, causing the helicopter's system to be out of sync with Perseverance rover. While the team quickly figured out the issue, because of Ingenuity's off-the shelf batteries, they expected this issue could happen again.

But now, this time was different.

Robots will be one of the keys to the expanding in-space economy. As launch costs decrease—hopefully significantly when Starship and other massive lift systems come online—the most significant barrier to entry for the space economy will finally come down.

So what happens then? Two acronyms have been popping up in the literature with increasing frequency—in-space servicing, assembly, and manufacturing (ISAM) and On-orbit servicing (OOS). Over a series of articles, we'll look at some papers detailing what those acronyms mean and where they might be going shortly. First, we'll examine how robots fit into the equation.

Space robots have been around since 1981 when the Shuttle Remote Manipulator System (SRMS) was launched with the space shuttle, whose astronauts then operated them.