because he went out looking for him
he
Odysseus met his father to tell him that he has returned home safely and that everything is going to be alright and not to worry
Odysseus returned home with a single Phaecian ship, as all of ships had been destroyed.
Odysseus had not yet returned home from the Trojan War because he had angered the god Poseidon. Poseidon placed many obstacles in Odysseus way so he would be unable to return to his home.
He's the only Greek who survived the war who has not yet returned home.
He sent storms and contrary winds to inhibit their journey home.
Penelope was worried that someone was fooling her, perhaps a god, into thinking Odysseus had returned home alive. To be gone twenty years and then return home then was very unlikely.
Odysseus was on his 10 year wanderings home, so he wasn't involver. Agamemnon was murdered by the boyfriend his wife had taken up with during his long absence.
How does Argos knows that his master Odysseus has returned? He recognizes Odysseus's face. He recognizes Odysseus's voice. He picks up the scent of his master. He doesn't; he dies just as Odysseus appears.
Telemachus and Odysseus met in the palace of Odysseus in Ithaca. After a long journey, Telemachus returned home and encountered his father, who had been disguised as a beggar. Their meeting was emotional, as Telemachus initially did not recognize Odysseus. This reunion marked the beginning of their collaboration to reclaim Odysseus's throne from the suitors.
20. Telemakhos was about a month old when Odysseus departed. He was gone for 20 years (10 at war and 10 at sea), so when Odysseus returned he was about 20.
Odysseus dressed up as an old beggar when he returned to Ithica.