4 ms·
They are not, especially after twilight, or before dawn.
by ncruces 3mo ago
They are not, especially after twilight, or before dawn.
- ben_w 3mo agoIndeed. Compare https://arxiv.org/pdf/2502.03651 https://arxiv.org/pdf/2502.03651 with https://en.wikipedia.org/wiki/Bortle_scale https://en.wikipedia.org/wiki/Bortle_scale