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The east coast of Australia was first explored by Captain James cook in 1770.
It is true that Lieutenant James Cook (not yet a captain) was the first European to chart the east coast of Australia.
When James Cook initially explored and charted Australia's eastern coast, he was still a Lieutenant. He was promoted to captain following his successful charting New Zealand and Australia's east coast.
Captain Cook's first journey to the eastern coast of Australia was in 1770. He charted and explored along the coast between April and August of that year, naming it New South Wales.
Lieutenant (later Captain) James Cook reached the eastern coast of Australia in April 1770. He first sighted and named Point Hicks on the southeastern coast, and gradually moved northwards.
James Cook did not discover Australia. He was the first to chart the eastern coast, doing so in 1770, when he was 41 years old, but Australia was first "discovered" by Dutch explorer Willem Jansz in 1606.
None. He was the first to seriously explore and map the coast of Australia, but that continent had already been discovered earlier by the Dutch.
No. Lieutenant James Cook, who was not yet a captain when he first charted the east coast of Australia, was on a mission of both exploration and scientific observation. The convicts arrived in Australia eighteen years after Cook sighted the east coast.
No, he sailed first to the southeatsern corner of Australia. The first person that could be said to have discovered the west coast of Australia would be Dirk Hartog in 1616.
It is a common misconception that Captain Cook discovered Australia. He did not. The Australian continent had been populated by Aborigines for thousands of years, and visited by numerous Asian traders and, later, explorers since the first known European visitor in 1616. Captain James Cook was the first European to sight and chart the eastern coast of Australia, which he did between April and August 1770.
James Cook (still a lieutenant when he first visited Australia, rather than a captain) was favourably impressed by his first sight of Australia's east coast, unlike his predecessor William Dampier who, upon exploring the northwest coast in 1688 and again in 1699, dismissed the continent as inhospitable. Cook believed that the east coast of Australia was suitable for colonisation, and he and Sir Joseph Banks recommended the region of Botany Bay as suitable for a convict settlement.
Captain James Cook was not a convict. Convicts did not arrive in Australia until 18 years after Cook first charted the east coast.