See also: 1819 in science, other events of 1820, 1821 in science and the list of years in science.

Table of contents

1 Astronomy 2 Biology 3 Computing 4 Exploration 5 Physics 6 Awards 7 Births 8 Deaths

Astronomy

• Royal Astronomical Society founded

• Christian Friedrich Nasse formulates Nasse's law: hemophilia occurs only in males and is passed on by unaffected females

• January 27 – Antarctica is sighted for the first time by British navy captain Edward Bransfield

• Hans Christian Orsted discovers relationship between electricity and magnetism
• Laws of electrodynamics established by André-Marie Ampère

• Copley Medal: Hans Christian Orsted

• March 24 - Alexandre-Edmond Becquerel, physicist († 1891)
• April 16 - Victor Alexandre Puiseux, mathematician († 1883)
• July 2 – William John Macquorn Rankine, physicist († 1872)
• August 2 - John Tyndall, physicist († 1893)