Latest LRO 2D Map of Milky Way Arms 2 September 2025
Result of combining entire available data set start of data collection up to 17 August 2025, from LRO 1, 2, and 3 hydrogen line radio telescopes.
astronomy.network The Website of Lichfield Radio Observatory (LRO)
Andrew Thornett, Lichfield, England, M6THO, andrew (at) thornett (dot) net