far north, losing many. The War of the Great Jewels followed, and lasted until the end of the First Age. Meanwhile, the Valar took the last living fruit of Laurelin and the last living flower of Telperion and used them to create the Moon and Sun, which remained a part of Arda, but were separate from Ambar (the world). The first rising of the sun over Ambar heralded the end of the Years of the Trees, and the start of the Years of the Sun, which last to the present day. Years of the Sun The Years of the Sun were the last of the three great time-periods of Arda. They began with the first sunrise in conjunction with the return of the Noldor to Middle-earth, and last until the present day. The Years of the Sun began towards the end of the First Age of the Children of Ilúvatar and continued through the Second, Third, and part of the Fourth in Tolkien's stories. Tolkien estimated that modern times would correspond to the sixth or seventh age. Ages of the Children of Ilúvatar The First Age of the Children of Ilúvatar, or Eruhíni, began during the Years of the Trees when the Elves awoke in Cuiviénen in the middle-east of Middle-earth. This marked the start of the years when the Children of Ilúvatar were active in Middle-earth. First Age The First Age of the Children of Ilúvatar, also referred to as the Elder Days in The Lord of the Rings, began during the Years of the Trees when the Elves awoke at Cuiviénen, and hence the events mentioned above under Years of the Trees overlap with the beginning of the First Age. Having crossed into Middle-earth, Fëanor was soon lost in an attack on Morgoth's Balrogs – but his sons survived and founded realms, as did the followers of his half-brother Fingolfin, who reached Beleriand after Fëanor's death. In the Dagor Aglareb or Glorious Battle, the armies of the Noldor led by Fingolfin and Maedhros attacked from the east and west, destroying the invading Orcs and laid siege to Morgoth's stronghold Angband. The Noldor for a time maintained the Siege of Angband, resulting in the Long Peace. This Peace lasted hundreds of years, during which time Men arrived over the Blue Mountains. Morgoth broke the siege in the Dagor Bragollach, or the Battle of Sudden Flame. The Eldar, Edain and