Is Avalanche part of Solana?

Excuse me, could you please clarify something for me? I've been reading about blockchain technology and the various projects that exist within it, and I came across Avalanche and Solana. From what I've gathered, they both seem to be innovative blockchain platforms with unique features. However, I'm a bit confused about whether Avalanche is in any way affiliated with or part of Solana. Could you help me understand the relationship, if any, between these two projects?