* 1607: Hudson sailed for the Dutch East India Company, seeking a northeast passage to Asia. He explored the Barents Sea and reached Novaya Zemlya, but failed to find a passage.
* 1609: He explored the Hudson River in North America, hoping to find a westward passage. He sailed up the river as far as present-day Albany, New York, naming it the "River of the Mountains".
* 1610: In his final voyage, he explored Hudson Bay, hoping to find a northwest passage. He became trapped in ice and his crew mutinied, abandoning him and his crew to perish.
So, to summarize, Henry Hudson explored:
* The Barents Sea and Novaya Zemlya (searching for the northeast passage)
* The Hudson River (searching for a westward passage)
* Hudson Bay (searching for the northwest passage)
His explorations significantly contributed to European understanding of the Arctic and North America, despite ultimately failing to find the elusive Northwest Passage.