Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Astrochemistry: overview and challenges   This paper provides a brief overview of the journey of molecules through the
Cosmos, from local diffuse interstellar clouds and PDRs to distant galaxies,
and from cold dark clouds to hot star-forming cores, protoplanetary disks,
planetesimals and exoplanets. Recent developments in each area are sketched and
the importance of connecting astronomy with chemistry and other disciplines is
emphasized. Fourteen challenges for the field of Astrochemistry in the coming
decades are formulated.

4
The categories of this paper are: cond-mat
20
The categories of this paper are: acc-phys
33
The categories of this paper are: plasm-ph
14
The categories of this paper are: math-ph
18
The categories of this paper are: econ
31
The categories of this paper are: ao-sci
15
The categories of this paper are: nucl-ex
25
The categories of this paper are: patt-sol
8
The categories of this paper are: hep-ex
32
The categories of this paper are: atom-ph
0
The categories of this paper are: hep-ph
16
The categories of this paper are: stat
23
The categories of this paper are: solv-int
30
The categories of this paper are: q-alg
26
The categories of this paper are: bayes-an
1
The categories of this paper are: cs