Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A Quantitative Criterion for Defining Planets   A simple metric can be used to determine whether a planet or exoplanet can
clear its orbital zone during a characteristic time scale, such as the lifetime
of the host star on the main sequence. This criterion requires only estimates
of star mass, planet mass, and orbital period, making it possible to
immediately classify 99% of all known exoplanets. All 8 planets and all
classifiable exoplanets satisfy the criterion. This metric may be useful in
generalizing and simplifying the definition of a planet.

30
The categories of this paper are: q-alg
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The categories of this paper are: chem-ph
37
The categories of this paper are: supr-con
4
The categories of this paper are: cond-mat
21
The categories of this paper are: adap-org
11
The categories of this paper are: hep-lat
15
The categories of this paper are: nucl-ex
35
The categories of this paper are: mtrl-th
8
The categories of this paper are: hep-ex
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The categories of this paper are: eess
1
The categories of this paper are: cs
20
The categories of this paper are: acc-phys
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The categories of this paper are: q-fin
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The categories of this paper are: atom-ph
12
The categories of this paper are: nucl-th
26
The categories of this paper are: bayes-an