CosmoCube: Listening to the Early Universe from the Lunar Far Side

• The University of Cambridge is developing the CosmoCube satellite to explore the "Cosmic Dark Ages" from the radio-quiet far side of the Moon.
• By utilizing the Moon as a natural shield, the satellite will capture 21-centimeter hydrogen emissions from 380,000 to 1 billion years after the Big Bang.
• The mission aims to decode the role of dark matter in pulling hydrogen together to form the first stars and galaxies.

The Research Gap

• The period between the Cosmic Microwave Background (CMB) and the formation of the first galaxies has remained invisible to current telescopes.
• Earth-based radio astronomy is hindered by ionospheric interference and terrestrial radio-frequency interference (RFI).
• The far side of the Moon is the only location that provides the necessary shielding to detect these faint, ancient signals.

Mission Operations

• The satellite will operate in a two-hour orbit, with approximately 40 minutes spent listening for echoes from the early universe while behind the Moon.
• Over a two-year mission, the probe will gather 1,000 hours of data to visualize the transition of the universe from dark and empty to transparent and bright.
• Data processing will employ Bayesian statistical analysis and computer simulations to strip away foreground noise, such as Milky Way radio emissions.

Technical Challenges and Development

• The mission utilizes a compact, low-cost platform featuring a fully integrated miniature radiometer with RF-Systems-on-Chip (RFSoCs).
• Engineers have developed specialized thermal designs to protect the payload from the extreme temperature swings of the lunar environment.
• With the UK Space Agency's support and partnerships with SSTL, Portsmouth University, and STFC RAL Space, the team aims to launch within five years.
• A future challenge involves the potential influx of lunar missions, which could threaten the unique radio-quiet status of the Moon's far side.