NASA Selects SpaceX to Launch StarBurst Mission for Studying Neutron-Star Mergers
Space Science: NASA has selected SpaceX to provide launch services for its StarBurst mission, a small satellite designed to investigate some of the most powerful short-lived explosions in the universe and improve scientists’ understanding of neutron-star mergers. NASA announced the launch-services selection on September 17, 2026.
Falcon 9 to Carry StarBurst
StarBurst is planned to travel to space as part of a Bandwagon rideshare mission aboard a SpaceX Falcon 9 rocket. The launch is scheduled from Space Launch Complex 40 at Cape Canaveral Space Force Station in Florida, with the mission currently planned for no earlier than 2028 under the newly announced launch arrangement.
The launch contract was awarded under NASA’s Venture-Class Acquisition of Dedicated and Rideshare (VADR) programme, which NASA uses to acquire launch services for smaller missions.
Searching for Short Gamma-Ray Bursts
The primary scientific objective of StarBurst is to detect short gamma-ray bursts (SGRBs). These extremely brief flashes of high-energy radiation are associated with some of the universe’s most energetic events.
Scientists believe that neutron-star mergers can produce these bursts. By observing the gamma-ray signal produced during such events, researchers hope to gain additional information about what happens when two extremely dense stellar remnants collide.
Combining Light and Gravitational Waves
StarBurst is designed for multimessenger astronomy, an approach that combines different types of signals from the same cosmic event.
The satellite’s observations can be compared with gravitational-wave detections from observatories on Earth and observations from other telescopes. This combination can provide information that cannot be obtained from a single type of signal alone.
A Wide View of the Sky
StarBurst is being developed as a wide-field gamma-ray observatory. NASA says the spacecraft will search the portion of the sky that is not blocked by Earth for brief, powerful gamma-ray explosions.
The mission’s detector system is designed to provide broad sky coverage, increasing the opportunity to identify gamma-ray emissions associated with neutron-star mergers.
Understanding Extreme Cosmic Objects
The mission could help scientists investigate several fundamental questions, including the origins of short gamma-ray bursts, the remnants left behind after neutron-star mergers and the behaviour of matter under the extreme conditions found inside neutron stars.
Researchers also want to better understand the powerful jets and outflows produced during these violent cosmic events.
Building on Earlier Discoveries
A major motivation for StarBurst comes from the historic 2017 detection of a neutron-star merger through both gravitational waves and electromagnetic radiation. That event demonstrated the scientific value of observing the same cosmic phenomenon through multiple messengers.
StarBurst is intended to expand this type of observation by providing a dedicated space-based gamma-ray detector that can work alongside gravitational-wave facilities and other observatories.
Mission Adds Another Tool to Space Astronomy
StarBurst is part of NASA’s Astrophysics Pioneers Program, which supports relatively small and lower-cost missions designed to investigate important astrophysical questions.
With its planned launch and wide-field gamma-ray observations, the mission will add another instrument to the international network studying gravitational waves, gamma rays and the extreme physics of neutron-star mergers.
If successful, StarBurst’s observations could provide scientists with additional data for understanding some of the universe’s most energetic events and the extreme environments surrounding merging neutron stars.
