Mayer is mostly remembered for his astronomical observations of the moon. In 1748 and 1749 he made a map of the lunar surface and came to the conclusion that there was no atmosphere on the moon. At the time this was a controversial opinion. His lunar tables, published in 1752, were recommended by the British Astronomer Royal, for their utility in determining longitude while at sea. Mayer's widow received a 3000 pound grant from the British government after bringing them to England.
A crater on the moon is named is named after him. He is often confused with his son, Johann Tobias Mayer, who was a physicist.
Mayer died during the French occupation of Gottingen on February 20, 1762.
Forbes, Eric Gray; "The Life and Work of Tobias Mayer (1723-62)"; Quarterly of the Royal Astronomical Society (1969)8:227-251
Wepster, Steven; "Father and Son Mayer"; Retrieved from staff.science.uu.nl
Tobias Mayer Wikipedia Entry