
Australia is surrounded by various seas and gulfs, and its closest neighbours are New Zealand to the southeast and Papua New Guinea to the north. Papua New Guinea is an island nation neighbouring Australia, known for its stunning natural beauty, including lush rainforests, towering mountains, and pristine beaches. It is home to some of the most diverse wildlife on the planet. Indonesia is also located to the north of Australia, separated by the Timor and Arafura seas.
| Characteristics | Values |
|---|---|
| Country 1 | Papua New Guinea |
| Country 2 | Indonesia |
| Relationship with Australia | Neighbours |
| Papua New Guinea's location relative to Australia | Northeast |
| Indonesia's location relative to Australia | Northwest |
| Papua New Guinea's separation from Australia | Coral Sea and Torres Strait |
| Indonesia's separation from Australia | Timor and Arafura seas |
| Papua New Guinea's independence from Australia | 1975 |
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What You'll Learn

Papua New Guinea is north-east of Australia
Papua New Guinea is located just north-east of Australia. It is one of the nearest countries to Australia, separated by the Coral Sea and Torres Strait. Papua New Guinea is an island nation known for its stunning natural beauty, including lush rainforests, towering mountains, and pristine beaches. It offers some of the most diverse wildlife on the planet, making it a paradise for nature lovers and adventure seekers. The country consists of both mainland and numerous islands scattered across the Pacific Ocean. Its rugged terrain and active volcanoes provide a unique and unparalleled experience for those seeking excitement and exploration.
Papua New Guinea was formerly an Australian external territory until it gained independence in 1975. It is part of Oceania, which includes Australasia, Melanesia, Micronesia, and Polynesia. The UN's definition of Oceania includes American Samoa, Australia, and their external territories, the Cook Islands, Easter Island, the Federated States of Micronesia, French Polynesia, Fiji, and many other islands and territories.
The geography of Papua New Guinea is diverse and remarkable. The country is home to vibrant coral reefs and dense jungles, providing endless opportunities for exploration and adventure. The island of New Guinea, which includes Papua New Guinea and Indonesian New Guinea, offers stunning landscapes, including snow-capped peaks and incredible wildlife.
The Solomon Islands, located northeast of Papua New Guinea, offer a tranquil escape with a warm climate and a strategic location near Timor-Leste. Vanuatu and New Caledonia are also nearby destinations, offering further opportunities for exploration and natural beauty. The region boasts a diverse environment, with tropical rainforests in the northeast, mountain ranges in the southeast, southwest, and east, and dry desert in the center.
The flora and fauna of Papua New Guinea and Australia are unique and distinct from the rest of the world. The two countries share a close proximity, and their historical isolation has contributed to the development of animals and organisms found nowhere else, such as marsupials and poisonous snakes and insects. The biodiversity in this region is separate from that of Asia, and imaginary lines drawn just north of Australia, such as Wallace's Line and Weber's Line, demarcate the separation between the Asian and Austral realms.
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Indonesia is north-west of Australia
Indonesia is also part of the Asian realm, with the imaginary line of Wallace’s Line or Weber’s Line drawn through it to demarcate the separation of plants and animals between the Asian and Austral realms. This accounts for the uniqueness of the flora and fauna in Australia compared to Indonesia.
Indonesia is also one of the nearest countries to Australia's southern neighbour, Papua New Guinea. Papua New Guinea is known for its stunning natural beauty, including lush rainforests, towering mountains, and pristine beaches. It boasts incredible wildlife, such as birds of paradise, and offers a paradise for nature lovers and adventure seekers alike.
Indonesia, Papua New Guinea, and Australia are neighbouring countries with distinct features and attractions that showcase the beauty and diversity of the region.
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Papua New Guinea and Indonesia share the island of New Guinea
New Guinea is divided into two parts: the western half, which is part of Indonesia, and the eastern half, which is the major part of Papua New Guinea, an independent country since 1975. The island is home to a diverse range of cultures and languages, with almost the entire population speaking Papuan languages, the original language of the island. The ethnic composition of the island is complex, with speakers of around 700 different languages. There are also small communities of speakers of Austronesian (Melanesian) languages, as well as some Polynesians, Chinese, and Europeans. The official language of Papua New Guinea is English, while the official language of Indonesia is Indonesian.
The island of New Guinea has a rich history, with evidence of human occupation as early as 50,000 years ago. The western half of the island was known to Indonesian and Asian seafarers centuries before it was known to Europeans. The island was later colonized by the Dutch as part of the Dutch East Indies, and they named it Nieuw Guinea. The Spanish explorer Yñigo Ortiz de Retez named the island New Guinea during a maritime expedition in 1545, due to the perceived resemblance of the indigenous people to those in the African region of Guinea.
The bulk of New Guinea's population are subsistence farmers, with yams, taro, sago, bananas, and sweet potatoes being staple foods. Papua New Guinea exports cash crops such as coffee, cacao, copra, palm oil, tea, and rubber, as well as skyjack tuna, prawns, and timber. The island is incredibly biodiverse, containing between 5 and 10 percent of the total species on the planet, with a high percentage of endemic species.
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The Coral Sea and Torres Strait separate Australia and Papua New Guinea
Australia is an island continent surrounded by the Indian and Pacific Oceans and a series of bays, gulfs, seas, and straits. It is separated from Papua New Guinea by the Coral Sea and Torres Strait to the northeast. The Coral Sea lies to the east of the Torres Strait, which connects it to the Arafura Sea and the Gulf of Carpentaria in the western Pacific Ocean. The Coral Sea is also connected to the Great Barrier Reef, which spans over 2,300 km along the northeast coast of Queensland, Australia.
The Torres Strait is a passage between the Australian mainland and the island of New Guinea, which is part of the country of Papua New Guinea. The strait is about 80-93 miles wide and contains many reefs and shoals that make navigation treacherous. The islands of the Torres Strait have been inhabited by humans for at least 2,500 years and have a unique culture and long-standing history with the nearby coastlines. The indigenous communities of the Torres Strait have had maritime-based trade and interactions with the Papuans to the north and the Australian Aboriginal communities, fostering cultural diffusion among these societies for thousands of years.
The Coral Sea and Torres Strait are important international sea lanes, although the Torres Strait is very shallow with a water depth of 7 to 15 meters and a maze of reefs and islands that make navigation challenging. The Torres Strait Treaty, signed in 1985 between Australia and Papua New Guinea, established the maritime boundary between the two nations and addressed the management of marine resources and the protection of habitats and biodiversity in the region.
The Coral Sea and Torres Strait are significant not only for their role in separating Australia and Papua New Guinea but also for their ecological and cultural importance. The Great Barrier Reef, located off the coast of Queensland, Australia, and connected to the Torres Strait, is home to thousands of species of marine life and is a vital ecosystem. Similarly, the islands of the Torres Strait have a rich human history and a diverse range of ecosystems and topographies, showcasing the natural diversity of the region.
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The Timor Sea and Arafura Sea separate Australia and Indonesia
Australia is an island continent surrounded by the Indian and Pacific Oceans. It is bordered by the Coral Sea and Torres Strait to the northeast, the Arafura and Timor seas to the northwest, the Coral Sea Islands Territory to the east, the Tasman Sea to the southeast, and the Indian Ocean to the south. The Arafura and Timor seas are thus an important part of the marine geography of the region.
The Arafura Sea is a shallow sea in the western Pacific Ocean, occupying 250,000 square miles (650,000 square km) between the north coast of Australia (Gulf of Carpentaria) and the south coast of New Guinea. It merges with the Timor Sea on the west and the Banda and Ceram seas on the northwest. The Arafura Sea is underlain by the Arafura Shelf, which is part of the more extensive Sahul Shelf. It is generally shallow, with depths of 165 to 260 feet (50 to 80 meters), deepening at its western edge, where coral reefs have grown at depths of nearly 2,000 feet (610 meters). The Arafura Shelf appears to have been a low-relief land surface with an arid climate before it was covered by the postglacial rise of the sea.
The Timor Sea lies to the northwest of Australia and forms part of the border between Australia and Indonesia. The Timor Sea is also bordered by the island of Timor-Leste, which lies to the north of the sea. The Timor Sea is an important part of the marine geography of the region and is a significant source of oil and gas for the bordering countries.
The Arafura and Timor seas are important links between the Indian and Pacific Oceans, and they play a role in global ocean circulation. The marine ecosystems of these seas are economically and ecologically important for the four nations bordering them: Australia, Indonesia, Timor-Leste, and Papua New Guinea. The Arafura and Timor seas consist largely of the shallow Australian continental shelf, which extends across most of the Arafura Sea and a large part of the Timor Sea.
In summary, the Arafura and Timor seas separate Australia and Indonesia, and they are an important part of the marine geography and ecology of the region. The Arafura Sea is a shallow sea located between Australia and New Guinea, while the Timor Sea lies to the northwest of Australia and is bordered by Indonesia and Timor-Leste. These seas play a crucial role in global ocean circulation and are of significant ecological and economic importance to the bordering nations.
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Frequently asked questions
Papua New Guinea and Indonesia lie just north of Australia.
Papua New Guinea is separated from Australia by the Coral Sea and the Torres Strait.
The island of New Guinea is divided between Papua New Guinea and Indonesia.









































