telescope.com Rank 146.5K. Estimated value 14,916$mtwilson.edu Rank 1.8M. Estimated value 1,224$nextspaceflight.com Rank 340.1K. Estimated value 6,384$worldwidetelescope.org Rank 1.2M. Estimated value 1,728$constellation-guide.com Rank 380.4K. Estimated value 5,700$noao.edu Rank 424.7K. Estimated value 5,100$rocketstem.org Rank 625.6K. Estimated value 3,456$nineplanets.org Rank 139K. Estimated value 15,732$cleardarksky.com Rank 235.6K. Estimated value 9,240$thespacereview.com Rank 1M. Estimated value 2,184$