astrotourism noun [U]
UK /ˌæs.trəʊ.ˈtʊə.rɪ.zᵊm/ US /ˌæs.troʊ.ˈtʊr.ɪ.zᵊm/
travelling to places to look at the stars or to see other events related to outer space, such as eclipses, rocket launches, etc.

Dark Skies, which claims to be the world’s first guide to “astrotourism”, is designed to help you to see the night sky in a new light. It takes you on a night-time journey to 35 dark-sky sites and national parks, and provides practical information on how to witness the next decade’s solar eclipses.
[The Times, 23 November 2019]

heritage travel noun [U]
UK /ˈher.ɪ.tɪdʒ.træv.ᵊl/ US /ˈher.ɪ.t̬ɪdʒ.træv.ᵊl/
travelling to places where your ancestors lived to learn more about their lives

In 2019, Airbnb partnered with 23andMe to give heritage travel recommendations to its customers. When 23andMe users get their DNA results, they also receive suggestions from Airbnb for rentals and experiences in their ancestral locations. Airbnb also has pages on its website dedicated to heritage travel.
[breaktheicemedia.com, 26 February 2020]

philantourism noun [U]
UK /ˌfɪl.ən.ˈtʊə.rɪ.zᵊm/ US /ˌfɪl.æn.ˈtʊr.ɪ.zᵊm/
going on holiday to places where the tourist industry needs support

“Philantourism” is all about travel as a force for good… it’s a natural evolution of voluntourism, but less of a commitment; you don’t need to do anything after you arrive, other than enjoy the culture, buy local and put your spending money into the tourism economy.
[townandcountrymag.com, 17 June 2020]

About new words