• Born date: 1562-10-04
  • Born in: Denmark
  • Death date: 1647-10-08
  • Death in: Copenhagen
Christen Sørensen Longomontanus

Christen Sørensen Longomontanus (or Longberg) (4 October 1562 – 8 October 1647) was a Danish astronomer.The name Longomontanus was a Latinized form of the name of the village of Lomborg, Jutland, Denmark, where he was born. His father, a laborer called Søren, or Severin, died when he was eight years old. An uncle took charge of the child, and had him educated at Lemvig; but after three years sent him back to his mother, who needed his help to work the fields.