Yes, Helios is another name for Apollo, specifically in his role as the god of the sun in Greek mythology.

While Apollo has a wider range of roles, including music, poetry, prophecy, healing, and archery, Helios is specifically focused on the sun's journey across the sky.

Think of it like this:

* Apollo is the overall god of the sun, light, and everything associated with it.

* Helios is the specific personification of the sun itself, driving his chariot across the sky.

So, while they are not completely interchangeable, Helios is essentially a specific aspect of Apollo's multifaceted personality.