Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Solar Neutrinos: A Popular Account   This encyclopedia article addresses questions like the following. How does
the Sun shine? Does the neutrino have a mass? Are there weak interactions
beyond those described by the standard model of particle physics?

20
The categories of this paper are: acc-phys
4
The categories of this paper are: cond-mat
17
The categories of this paper are: q-fin
7
The categories of this paper are: hep-th
2
The categories of this paper are: math
34
The categories of this paper are: chem-ph
32
The categories of this paper are: atom-ph
25
The categories of this paper are: patt-sol
13
The categories of this paper are: quant-ph
9
The categories of this paper are: nlin
22
The categories of this paper are: chao-dyn
23
The categories of this paper are: solv-int
18
The categories of this paper are: econ
31
The categories of this paper are: ao-sci
16
The categories of this paper are: stat
21
The categories of this paper are: adap-org