He founded the Uppsala Astronomical Observatory in 1741, and in 1742 he proposed the Celsius temperature scale which bears his surname, though this was revised in 1745 by Carl Linnaeus, inverting the original scale, one year after Celsius' death from tuberculosis.
He founded the Uppsala Astronomical Observatory in 1741. He proposed the Celsius temperature scale. This was in 1742. This Celsius temperature scale bears his surname. This was revised in 1745 by Carl Linnaeus. This Celsius temperature scale was inverting the original scale from tuberculosis. The original scale was one year after Celsius' death.