The flight moves the tiles out of ground-based hypervelocity testing and into use on an operating spacecraft. Atomic-6 designed them to shield spacecraft from micrometeoroids and orbital debris. The company also pitches them as a defense against Kessler Syndrome, the feared chain reaction in which collisions in crowded orbits create enough fragments to set off still more collisions.

In ground tests, according to Atomic-6, the tiles stopped projectiles moving faster than 7 kilometers per second, or about 16,000 mph, without throwing off harmful secondary fragments. The company said conventional aluminum Whipple shields, the standard layered barrier used on many spacecraft, produced larger fragments under comparable conditions. Atomic-6 describes its tiles as lighter and thinner than those shields.

"We've proven Space Armor tiles can withstand debris traveling at extraordinary speeds without generating harmful secondary fragments," said Trevor Smith, Atomic-6's chief executive.

The material also made possible what the companies describe as the first composite radome, a cover that protects communications equipment while letting radio signals pass through.

Starburst-1 is built for rapid maneuvering. Over a one-year primary mission it will demonstrate rendezvous and proximity operations, the close-quarters flying needed to approach or work alongside other objects in orbit. Atomic-6 and Portal plan to use what they learn on the flight to validate procedures for installing the tiles on future spacecraft.

Jeff Thornburg, Portal's co-founder and chief executive, called the launch "a milestone deserving of celebration." Portal has raised $75 million since it emerged from stealth in 2024.