Over a decade ago, we tipped readers to the astronomy illustrations of Trouvelot. now the New York Public Library has a large collection of his work available online.
Codex 99 published even larger versions if you're looking for good wallpaper of printing options.
Trouvelot was a classic case of the Victorian autodidact. With no formal training he left behind a legacy of several books and monographs, more than 50 scientific papers and nearly 7000 illustrations covering the entire range of natural science – everything from astromony to moths and butterflies to reptiles to geological surveys. Of course he will be remembered for his other legacy – the gypsy moth – which continues to spread across North America and causes nearly a billion USD of damage each year.
• The Trouvelot astronomical drawings (New York Public Library)