Ngai Tahu Tourism has entered into a joint venture with Earth & Sky, the Tekapo-based stargazing and observatory tours operator.
Details of the multi-million dollar 50/50 joint venture deal remain confidential.
Ngai Tahu Tourism chief executive Quinton Hall said the partnership would enhance both businesses.
"This joint venture is a great fit for Ngai Tahu Tourism and aligns with our diverse portfolio of iconic experiences in the southern region," said Hall.
Ngai Tahu Tourism is one of the largest tourism operators in New Zealand, hosting one million customers a year across nine existing businesses.