The Arsia Mons Elongated Cloud forms when Mars’ atmosphere interacts with the tall volcano, creating a spectacular sight.
More info about it:
https://phys.org/news/2024-09-cloud-atlas-mars-showcases-array.html
https://www.space.com/mars-weird-long-cloud-arsia-mons-secrets
It’s okay not to remove the hyphen. It’s also correct English to keep the hyphen.