Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A Brief History of the Study of Nearby Young Moving Groups and Their
  Members   Beginning with the enigmatic (and now emblematic) TW Hya, the scutiny of
individual stars and star-disk systems has both motivated and benefitted from
the identification of nearby young moving groups (NYMGs). I briefly outline the
emergence of this relatively new subfield of astronomy over the past two
decades, and offer a few examples illustrating how the study of NYMGs and their
members enables unique investigations of pre-main sequence stellar evolution,
evolved protoplanetary disks, and young exoplanets.

22
The categories of this paper are: chao-dyn
13
The categories of this paper are: quant-ph
27
The categories of this paper are: comp-gas
3
The categories of this paper are: physics
10
The categories of this paper are: q-bio
8
The categories of this paper are: hep-ex
18
The categories of this paper are: econ
35
The categories of this paper are: mtrl-th
28
The categories of this paper are: alg-geom
2
The categories of this paper are: math
17
The categories of this paper are: q-fin
16
The categories of this paper are: stat
31
The categories of this paper are: ao-sci
34
The categories of this paper are: chem-ph
7
The categories of this paper are: hep-th
0
The categories of this paper are: hep-ph