- stars: 1,811,709,771
- deepest magnitude: 20
- precision: a few tens of micro-arcseconds
- stars with parallaxes and proper motions: 1,467,744,818
- value: priceless
Read more about it in the Sky & Telescope article.
Observation notes (with equipment details), photos, sketches, reviews, software tips, random thoughts, by an amateur astronomer.
Read more about it in the Sky & Telescope article.
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