The project 'AstroChain - Decentralized Science' aims to engage individuals through a blend of astronomy and blockchain technology, which may indirectly support public good through educational enhancement and possibly democratizing space exploration data. However, its direct and measurable local impact is not immediately evident from the provided description, as it appears to have a broader, more international focus rather than targeting specific local communities. Thus, it's unclear if the project meets the 'local impact' aspect of the criteria without additional information on localized implementations or initiatives.