CoAstro aims the idealisation, implementation and evaluation of a scientific dissemination mechanism that allows the flow of results and scientific processes between researchers and audiences with low astronomy awareness, through schools. CoAstro reduces territorial inequalities (SDG 10), because it targets students and teachers of Portuguese regions, with lower spontaneous engagement with science. This also ensures inclusive and equitable quality education, leading to relevant and effective learning outcomes (SDG 4.1.) and including people with disabilities and children in vulnerable situations (SDG 4.5). CoAstroCoAstro ensures public access to information (SDG 16.10).