Chandrayaan-1 Data Identifies Australe as Moon's Potentially Oldest Impact Basin

Gist Planetary scientists at the Physical Research Laboratory PRL have confirmed the existence of a highly eroded, hidden impact crater on the Moon named the Australe Basin . Discovered using mineralogical data from India's Chandrayaan-1 mission, this basin is believed to be older than the South Pole-Aitken SPA Basin , currently recognized as the Moon's oldest crater. For UPSC aspirants, this highlights the enduring scientific value of legacy space missions and provides crucial geological context for future lunar South Pole missions like Chandrayaan-4 . Background Impact Basins: These are large craters often hundreds of kilometres in diameter formed by violent space events like asteroid or meteorite strikes, which frequently trigger secondary volcanic activity. Scientists estimate the Moon has about 300 impact basins , but only 74 had been detected prior to this discovery due to severe surface erosion over billions of years. Chandrayaan-1 2008 : India's first lunar probe carried 11 scientific payloads , including six from international partners like NASA and the European Space Agency ESA . Moon Mineralogy Mapper M3 : A NASA-supplied imaging spectrometer aboard Chandrayaan-1. It…