Plant IDs

First two pics are of some grass in my backyard. It's soft and springy and I love it. (Which probably means it's a hated grass.) Two apps are IDing it as Bluegrass – which would be funny since I'm from Kentucky. Anyone know if that's correct?

Second two pics have little clusters that are growing next to two fall asters I've planted. Are they the asters spreading or something I should remove because they will compete with the asters?

If you can help, thanks!