Hanwha Systems and its subsidiary Satrec Initiative are proposing an integrated panel-type satellite design that fuses payload, bus, and solar arrays to maximize packing density in the launch fairing.

Following the October 2026 selection, an initial batch for the SAR constellation is targeted for a December 2026 launch to begin operations alongside the 425 Project assets.

The Defense Acquisition Program Administration and the Korea AeroSpace Administration will evaluate flight-ready hardware for the SAR program in October 2026.

The South Korean government is using a develop-first, select-later procurement strategy for the 40-satellite SAR constellation program.

The 40-satellite constellation will be deployed over five launches.

Korea Aerospace Industries partnered with LIG Nex1 to offer a cube-shaped satellite platform optimized for thermal management and multi-angle observation.

Korea Aerospace Industries is competing with Hanwha Systems for a 1.2 trillion won military contract to construct a 40-satellite synthetic aperture radar constellation.

SpaceX is contracted to conduct the first three missions for the 40-satellite SAR constellation, each carrying eight satellites.

Hanwha Group is positioning its bid to control the value chain by having Hanwha Aerospace produce the Nuri launch vehicle and Hanwha Systems build the payloads.

Korea Aerospace Industries is pursuing supply chain diversification and validation of commercial components for orbital use to lower barriers to mass production.

The SETI@home team expects most or all of the candidate signals to be local radio-frequency interference (RFI) rather than genuine extraterrestrial signals.

SETI@home processed data collected by the Arecibo radio telescope in Puerto Rico.

FAST is now the only radio telescope capable of detecting the SETI@home candidate signals after Arecibo’s destruction.

SETI@home results were presented in two papers published in 2025 in The Astronomical Journal, one on data analysis and results and one on data acquisition and processing.

Eric Korpela is an astronomer at the University of California, Berkeley.

David Anderson is a computer scientist at the University of California, Berkeley.

SETI@home co-founders include David Anderson, Eric Korpela, and Dan Werthimer.

SETI@home identified 12 billion narrowband candidate signals during its operation.

The Arecibo radio telescope collapsed and was destroyed in December 2020.

FAST has a 500-meter aperture and began monitoring the century-long set of candidate signals in July 2025.

The SETI@home dataset covered observations of billions of stars in the Milky Way.

SETI@home’s organizers originally estimated they might reach 50,000 users but had 200,000 users within the first week and 2 million users within a year.

The Arecibo radio telescope had a 305-meter single-dish aperture and was the largest single-dish radio telescope until FAST’s arrival in 2016.

Max Planck Institute for Gravitational Physics supercomputer facilities ran algorithms that reduced SETI@home’s 12 billion candidate signals to 1 million, then to 1,000, and finally to 100 candidates for manual inspection.

SETI@home narrowband candidate signals are momentary energy spikes at a particular frequency originating from a specific point in the sky.

SETI@home operated from 1999 to 2020 as a distributed computing citizen-science project.

Astronomers are using the Five-hundred-meter Aperture Spherical Telescope (FAST) to follow up on 100 interesting candidate signals detected by SETI@home.

Dan Werthimer is an astronomer and electrical engineer at the University of California, Berkeley.

The Long March 12B is a kerolox rocket.

The Long March 12B successfully completed a static fire test at Jiuquan.

The Long March 12A is a methalox rocket.

The reusable Long March 12B rocket has completed a static fire test at Jiuquan.

The landing took place at the DongFeng landing site at 08:40 UTC on January 18, 2026.

The uncrewed return capsule of Shenzhou-20 is being tested for survivability.

The Shenzhou-20 spacecraft is returning shortly.

Shenzhou-20 astronauts CHEN Dong, CHEN Zhongrui, and WANG Jie safely landed in the Shenzhou-21 return capsule.

The CYZ-1 crew capsule has a test article weight of 5 tons.

INTERSTELLOR completed a landing test of the CYZ-1 crew capsule, dropped from a height of over 3 meters.

The Long March 3B rocket launched from Launch Complex 2 at Xichang Satellite Launch Center.

Ceres-2 launch day mail covers feature the stamp "Failure Due To Problems" in red print.

Chinese entities produce launch day mail covers for almost every launch.

The 5th Long March 12 rocket is scheduled for launch on January 19, 2026 at approximately 07:48 UTC.

China experienced its first double-launch failure in a single day since 2005.

Another SatNet LEO communications satellite launch is expected to occur from Wenchang.

The LM-12 uses completely different engines from the LM-3B.

The LM-12 uses different fuel from the LM-3B.

The LM-3B and LM-7A are likely to be grounded due to their shared LH2/LOX third stage.

The LM-12 was rolled out to the launch pad on January 16, 2026.

NASA rolled the SLS rocket for Artemis II to Launch Complex 39B.

The Artemis II launch is targeting a date no earlier than February 9 at 04:20 UTC.