---
title: "Robot Assembles Antenna in Open Space for the First Time Without Earth Control"
description: "A Caltech team has conducted the first-ever experiment in the fully autonomous assembly of a 1.4-meter antenna in open space. The ASTRA module, launched on a Falcon 9 in March 2026, independently connected composite elements without direct control from Earth."
date: 2026-11-11T09:59:22.313Z
lang: en
url: https://xab.info/en/posts/robot-assembles-antenna-in-space-autonomously
tags: [space, robotics, darpa, caltech, autonomous-construction, spacex, falcon-9, orbit]
author: "Alexander Buran"
publisher: "XAB.info"
---

# Robot Assembles Antenna in Open Space for the First Time Without Earth Control

![Autonomous space satellite with a large reflector antenna against the background of planet Earth](https://xab.info/media/2026/11/11/robot-vpervye-sobral-antennu-v-kosmose-avtonomno/robot-vpervye-sobral-antennu-v-kosmose-avtonomno-1.webp)

## Key Points

- Caltech's ASTRA module autonomously assembled a structure in open space for the first time without direct Earth control
- A 1.4-meter antenna was created from composite tubes, aluminum nodes, and Kapton; launched on March 30 on Falcon 9 under Transporter-16
- The experiment is part of the DARPA NOM4D program; project leader is Sergio Pellegrino
- Full assembly was not completed due to time constraints, but key stages of autonomous construction were confirmed
- The technology eliminates dependence on rocket fairing dimensions and opens the path to large orbital structures

A team from the California Institute of Technology (Caltech) has conducted the first-ever experiment in the fully autonomous assembly of a structure in open space. The experimental ASTRA module (Autonomous In-Space Tensioned Reflector Assembly) spent several hours in orbit connecting composite tubes, aluminum nodes, and a reflective Kapton film to create a 1.4-meter-diameter antenna. The mission's key difference from previous robotic operations in orbit was that the system autonomously positioned parts and fixed them on a mounting plate without requiring direct control from Earth operators.

### Launch and Orbital Integration

The ASTRA spacecraft launched on March 30, 2026, aboard a Falcon 9 rocket as part of SpaceX's Transporter-16 mission. Upon reaching its target orbit, the module was integrated into the Vigoride 7 space tug developed by Momentus. It was from this platform that the robotic manipulator performed the assembly operations. Control was exercised through brief communication sessions lasting about 15 minutes per day: engineers on Earth transmitted commands, while the onboard system independently handled element positioning and fixture.

### DARPA NOM4D Program and Experiment Goals

The demonstration is part of the NOM4D (Novel Orbital and Moon Manufacturing, Materials, and Mass-efficient Design) program by the Defense Advanced Research Projects Agency (DARPA). Project leader Sergio Pellegrino emphasized that the current result merely tests basic assembly algorithms before moving on to large-scale structures hundreds of meters or kilometers in size. According to him, successful autonomous assembly forms the technical foundation for future orbital infrastructure.

### Overcoming Launch Vehicle Limitations

Payload limitations during launch are dictated by the dimensions of the rocket fairing: the larger the structure, the more complex and expensive its delivery to orbit. Assembling components in zero gravity makes it possible to create structures of virtually any area, removing dependence on carrier dimensions. This paves the way for creating large optical mirrors for astronomical observatories, powerful solar arrays for orbital power plants, and radio telescopes to receive weak signals from the depths of the universe.

### Parallel Research and Mission Limitations

In parallel, under the same DARPA program, a team from the University of Illinois Urbana-Champaign is testing carbon tube hardening methods in open space conditions aboard the International Space Station. As for the ASTRA mission, the team did not manage to complete the full assembly of the antenna due to the strict time limits of the experiment. Nevertheless, the mission confirmed the operability of key autonomous construction stages, which developers consider sufficient to continue scaling the technology.

### Prospects for Orbital Infrastructure

The successful demonstration of autonomous assembly in space establishes the basis for the development of global telecommunication networks and scientific research requiring large orbital structures. The technology makes it possible to shift from the 'launch-and-receive' principle to a 'launch components-assemble in orbit' model, which fundamentally changes the economics of space missions and expands the range of feasible projects beyond the capabilities of existing launch vehicles.

## Fact-Check & Sources

- [Впервые в истории робот создал автономное сооружение в космосе](https://www.ixbt.com/news/2026/11/11/vpervye-v-istorii-robot-sozdal-avtonomnoe-sooruzenie-v-kosmose.html) - The primary source contains all key facts: module name ASTRA, developer (Caltech), antenna parameters (1.4 m), launch date (March 30), rocket (Falcon 9, Transporter-16), tug (Vigoride 7, Momentus), program (DARPA NOM4D), leader (Sergio Pellegrino), communication session duration (15 min), and University of Illinois parallel project. All data has been transferred to the article without changes.

## FAQ

### What is the ASTRA module and who developed it?

ASTRA (Autonomous In-Space Tensioned Reflector Assembly) is an experimental module for the autonomous assembly of structures in space, developed by a team at the California Institute of Technology (Caltech). It is capable of autonomously positioning and fixing parts without direct control from Earth.

### When and how was ASTRA launched?

The module launched on March 30, 2026, aboard a Falcon 9 rocket as part of SpaceX's Transporter-16 program. After reaching orbit, it was integrated into Momentus's Vigoride 7 space tug.

### What result was achieved during the experiment?

Over several hours, the robotic manipulator connected composite tubes, aluminum nodes, and a reflective Kapton film, creating a 1.4-meter-diameter antenna. Full assembly was not completed due to time constraints, but key stages of autonomous construction were confirmed.

### What is DARPA's role in this project?

The experiment is part of the NOM4D (Novel Orbital and Moon Manufacturing, Materials, and Mass-efficient Design) program by the U.S. Department of Defense's Advanced Research Projects Agency. The project leader is Sergio Pellegrino.

### What practical applications does this technology open up?

Autonomous assembly in space allows the creation of structures of any size without the constraints of a rocket fairing. This paves the way for large optical mirrors, solar panels for orbital power plants, radio telescopes, and global telecommunication network elements.