  In this paper we demonstrate that there are large classes of
Friedmann-Robertson-Walker (FRW) cosmologies that admit isotropic conformal
structures of Quiescent Cosmology. FRW models have long been known to admit
singularities such as Big Bangs and Big Crunches [1, 2] but recently it has
been shown that there are other cosmological structures that these solutions
contain. These structures are Big Rips, Sudden Singularities and Extremality
Events [1, 2]. Within the Quiescent Cosmology framework [3] there also exist
structures consistent with a cosmological singularity known as the Isotropic
Past Singularity (IPS) [4, 5]. There also exists a cosmological final state
known as a Future Isotropic Universe (FIU) [4], which strictly speaking,
doesn't fit with the fundamental ideals of Quiescent Cosmology. In this paper,
we compare the cosmological events of a large class of FRW solutions to the
conformal structures of Quiescent Cosmology [4]. In the first section of this
paper we present the relevant background information and our motivation. In the
second section of this paper we construct conformal relationships for relevant
FRW models. The third section contains a thorough discussion of a class of FRW
solutions that cannot represent any of the previously constructed isotropic
conformal structures from Quiescent Cosmology. The final section contains our
remarks and future outlook for further study of this field.

General Relativity and Quantum Cosmology