Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Constraints on Galaxy Structure and Evolution from the Light of Nearby
  Systems   We review knowledge of galaxy structures obtained by their emitted light and
in the local universe where they can be studied in great detail. We discuss the
shapes of, and stellar motions within, galaxies, compositional clues derived
from their spectra, and what luminous matter implies about their dark matter
content. Implications on the current theory of hierarchical galaxy formation
are explored.

4
The categories of this paper are: cond-mat
8
The categories of this paper are: hep-ex
29
The categories of this paper are: funct-an
11
The categories of this paper are: hep-lat
35
The categories of this paper are: mtrl-th
24
The categories of this paper are: dg-ga
5
The categories of this paper are: gr-qc
0
The categories of this paper are: hep-ph
20
The categories of this paper are: acc-phys
23
The categories of this paper are: solv-int
37
The categories of this paper are: supr-con
10
The categories of this paper are: q-bio
31
The categories of this paper are: ao-sci
13
The categories of this paper are: quant-ph
34
The categories of this paper are: chem-ph
14
The categories of this paper are: math-ph