Tycho Celchu is part of the fictional Star Wars Universe. He was seen briefly in Return of the Jedi and was later featured in the Expanded Universe X-Wing comics by Mike Stackpole , and the novels by Stackpole and Aaron Allston .

Tycho is a human male from Alderaan, the son of an Alderaanian Holonet magnate. He joined the Imperial Navy, where he trained under Soontir Fel alongside future Rogues Hobbie Klivian and Biggs Darklighter. On his 21st birthday, he was speaking to his family on Alderaan when the connection suddenly disappeared. Later, he learned that that was the moment when the Death Star destroyed the planet, killing all its inhabitants.

Tycho defected to the Rebel Alliance and was present when the Empire attacked their base on Hoth. He rescued Hobbie Klivian when his snowspeeder was damaged during the evacuation. Tycho joined Rogue Squadron and flew an A-Wing at the Battle of Endor. Tycho followed Lando and Wedge into the Death Star tunnel, and broke off when ordered to do so by Lando to draw off some of the Imperial pursuit. It is at this point that he was seen in the Return of the Jedi. After the turning point at Endor, Tycho distinguished himself in many battles, proving his loyalty both to the Alliance and to his friends.

He volunteered to infiltrate the Imperial capital of Coruscant, but was captured by Ysanne Isard. Her attempts to turn him into a sleeper agent failed, but when he escaped and returned to the Rebellion, certain officers expressed their doubts as to his loyalty. Wedge Antilles campaigned to have him made Executive Officer of Rogue Squadron. Tycho was instrumental in the conquest of Coruscant, but when fellow Rogue Corran Horn disappeared and was presumed dead, Tycho was tried for his murder. Corran's re-appearance at the last minute saved Tycho's life, and his reputation within the New Republic. Tycho later used the Imperial Credits deposited in his name in an attempt to frame him to fund the liberation of Thyferra.

While Wedge formed the new Wraith Squadron, Tycho took command of the Rogues. He later accompanied Wedge to the world of Adumar , along with Hobbie Klivian and Wes Janson. After Wedge's promotion to General, Tycho accepted the promotion to Colonel and took over Rogue Squadron for good. He later retired and married Winter, advisor to Princess Leia Organa, and turned the squadron over to Gavin Darklighter.

Tycho returned to active service to fight the Yuuzhan Vong. Tycho survived the war, and following the war he retired and returned home.