Астроном эпохи Просвещения

Transform this person into a royal astronomer from the 1700s. Wearing a velvet frock coat and silk cravat, looking through a giant brass telescope in an observatory, walls covered with star maps, dimly lit by candles and moonlight. Transfer face exactly 1:1 from the uploaded photo, maintain identical facial features, body proportions and skin tone. Full body visible, centered composition, nothing cropped at edges, 8k, ultra detailed, masterpiece quality