UK Satellite to Seek Universe's First Radio Signal

Researchers in the UK are embarking on an ambitious project to deploy a suitcase-sized satellite, named CosmoCube, into lunar orbit. The primary objective is to detect the faint 21cm line radio frequency signal, which originated from neutral hydrogen atoms in the early universe.

This crucial signal acts as a cosmic thermometer, allowing scientists to study phenomena from the universe's 'dark ages,' roughly 380,000 years after the Big Bang, through the emergence of the first stars and galaxies during the 'cosmic dawn.' The mission also aims to observe the end of the epoch of reionization, approximately one billion years after the Big Bang.

By positioning CosmoCube to observe from the far side of the moon, the team intends to circumvent the significant interference challenges that have plagued previous Earth-based attempts to detect this weak signal. The project, with an estimated cost of just under £50 million, is slated for a launch in approximately five years, and has already secured over £2 million in funding from the UK Space Agency.

Experts suggest that the amplitude and shape of the 21cm signal could also be influenced by dark matter, potentially offering new insights into its mysterious nature. While other missions are also targeting these cosmic measurements, the CosmoCube project represents a significant effort to unlock the universe's earliest secrets.