The land they occupy on Biak island is everything to them: their identity, the source of their livelihood and the link to their forebears. But now the tiny clan fears it will lose its place in the world as Indonesia pursues its longstanding quest to join the space age.

The Indonesian government claims to have acquired 250 acres of the clan’s ancestral land decades ago and has planned since 2017 to build a small-scale spaceport there to launch rockets. Clan leaders say the project would force them from their homes. Indonesia’s president, Joko Widodo, personally pitched SpaceX’s founder, Elon Musk, last year on the idea of launching rockets from Indonesia, without mentioning a site. Musk has yet to commit to a deal or comment on it publicly. But the possibility of his involvement has spurred a flurry of activity by Biak officials to promote the location, as well as renewed opposition from the island’s Indigenous people.

Building a spaceport is part of Joko’s push to modernise the Southeast Asian island nation with new airports, power plants and highways, often with little regard for environmental consequences. It is also part of the country’s checkered history of using questionable methods to acquire land from Indigenous people, leaving some groups destitute while benefiting influential Indonesians and international companies.

Leaders of the Biak tribe say building a spaceport on the site would mean cutting trees in a protected forest, disturbing the habitat of endangered birds and evicting the Abrauw. “The position of the Indigenous people is clear: We reject the plan,” said Apolos Sroyer, chief of the Biak Customary Council, an assembly of clan chiefs. “We don’t want to lose our farms because of this spaceport. We don’t eat satellites. We eat taro, and fish from the sea. That is our way of life for generations. Tell Elon Musk that’s our stance.” Biak, nearly the size of Maui, sits just north of the island of New Guinea and is part of Indonesia’s Papua Province. During World War II, American forces defeated the Japanese there in a key battle as Gen. Douglas MacArthur fought to retake the Pacific. Biak became part of Indonesia in the 1960s after the United Nations handed over the former Dutch territory of West Papua on the condition that Indonesia hold a popular vote.

The dwindling Abrauw clan, one of 360 clans on Biak, now has about 90 members. Most live in the village of Warbon, on the island’s northeastern side, about a mile and a half from the proposed spaceport site. The center of clan life is a flowering heliotrope tree by the ocean. Waves lap gently on the white sand nearby, and black, brown and white butterflies flit among its branches. Clan members consider the tree sacred and say it marks the origin of the Abrauw. They often visit the tree to make offerings and pray to their ancestors. On occasion, they gather there and camp for days. If the spaceport were built, the tree would be off limits, as would the beach where the Abrauw often fish, and the forest where they farm.

“For Papuans, land is identity,” said Marthen Abrauw, the clan chief, as he sat in the shade of the sacred tree on a recent afternoon. “We will lose our identity, and no other clan will accept us on their land. Where will our children and grandchildren go?”