Yes it is. A supercluster has up to 50 galaxies where the local group contains up to 30. The local group cluster is actually located within the Local (or Virgo) supercluster.
Superclusters are large groupings of smaller galaxy groups and clusters, and are among the largest structures of the cosmos.
Our local cluster is known as - well "The Local Cluster", Not very imaginative I know. It is part of the the Virgo Supercluster or Local Supercluster.
If you can ignore the effects of air resistance, the horizontal component of projectile velocity doesn't change at all.
Way too many to count. A rough guess at over a trillion stars. See related link for a list of galaxies in our local cluster