NASA flew a 64-gram experiment built for about $1,500 by a teenager in rural India alongside dozens of other student payloads in 2017 — the suborbital test showed that its 3D-printed structure could survive launch

The 64-gram student experiment that lifted off from NASA’s Wallops Island facility on June 22, 2017 would have been easy to lose in a coat pocket. It was a cube less than four centimeters on a side, weighing 64 grams, lighter than a smartphone, lighter than a hen’s egg, and it had been designed not in a cleanroom in Pasadena or Bangalore but in Pallapatti, a small town in the Karur district of Tamil Nadu, by an 18-year-old named Rifath Sharook.

It was widely described at launch as the lightest satellite ever flown, although its 2017 trip was a suborbital student experiment rather than an orbital satellite mission. Its budget would not have covered the catering on a normal space programme: roughly one lakh rupees, about $1,500.

The competition

The route from Pallapatti to a NASA launch pad ran through a contest called Cubes in Space, run by an education organization with NASA’s support, which invites school students worldwide to design experiments that can fly on a NASA sounding rocket or balloon, with one brutal constraint: the entire payload must fit in a tiny cube and meet a strict weight limit. The 2017 cycle reportedly drew 86,000 entries from students in dozens of countries. KalamSat was not the only design selected: NASA’s mission report says more than 80 Cubes in Space experiments flew on the rocket, alongside more than 30 other student experiments. Sharook’s design was one of that group.

Sharook was no casual entrant. The son of a science teacher who had raised him on the night sky, he had won a national young-scientist prize at 15 for a helium weather balloon, and he was working as lead scientist with Space Kidz India, a Chennai outfit run by Srimathy Kesan that exists to put ambitious students on exactly this kind of stage. For the NASA contest, his team designed a femto-satellite, the smallest class of spacecraft there is, and named it KalamSat, after A.P.J. Abdul Kalam, the rocket-engineer president of India who spent his later years telling schoolchildren to aim implausibly high.

The material is the mission

What made KalamSat more than a stunt was its scientific job, which was elegantly self-referential: the satellite’s payload was, in large part, the satellite itself. Its structure was 3D-printed from reinforced carbon fibre polymer, and the mission’s stated purpose was to demonstrate how that printed material performed through the violence of a rocket flight, the launch loads, the vibration, the temperature swings, and the minutes of microgravity at the top of the arc. Packed inside the little cube were an indigenous onboard computer and eight built-in sensors measuring acceleration, rotation and Earth’s magnetic field, the instrumentation of a full-sized spacecraft shrunk to the mass of a few coins.

The logic mattered beyond the contest. Satellites are expensive substantially because their structures are exotically manufactured and exhaustively qualified; if a structure can simply be printed and still take the ride, the price of entry to space drops for everyone, most of all for schools and small nations. KalamSat flew on a Terrier-Orion sounding rocket and operated for about 12 minutes during the suborbital experiment. The widely repeated 240-minute figure referred to the planned mission span, including post-flight recovery, rather than four hours spent in space. By the team’s account, the printed cube did its one job: it survived.

The sequel reached orbit

The 2017 flight was suborbital, up and down, which left an obvious itch unscratched, and the team scratched it eighteen months later. In January 2019, ISRO, India’s space agency, carried KalamSat-V2, a 1.26-kilogram successor built by Sharook, Mohammed Abdul Kashif and the Space Kidz team, into orbit on a PSLV rocket, where it operated as a ham-radio communications satellite. Indian officials celebrated it as the lightest satellite ever placed in orbit, built in six days at a small fraction of conventional cost, and ISRO flew it free of charge, using the rocket’s spent fourth stage as an orbital platform for the first time. The student experiment had graduated into the national program.

Sharook’s own line about the project has always pointed past the hardware. The team researched cube satellites worldwide, found nothing lighter, and concluded that the record was available to whoever cared to claim it, which is a fair summary of the whole affair. Nothing about KalamSat required a billion-dollar agency: a contest with an open door, a printer, a $1,500 budget, a teenager with a specific obsession, and an organization willing to back him. The student programme reviewed tens of thousands of designs and sent up the experiment from Pallapatti alongside dozens of other small cubes. Its message, delivered at 64 grams, was aimed less at engineers than at every student who assumed the door was locked. It never weighed much. It just needed to survive the ride, and it did.

Correction, 31 August 2026: An earlier version said NASA selected KalamSat alone from 86,000 entries and described its suborbital flight as lasting 240 minutes. It was one of more than 80 Cubes in Space experiments carried on the mission; the 240-minute figure included the broader mission and recovery period.

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