Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Spitzer's Solar System studies of asteroids, planets and the zodiacal
  cloud   In its 16 years of scientific measurements, the Spitzer Space Telescope
performed a number of ground-breaking infrared measurements of Solar System
objects. In this second of two papers, we describe results from Spitzer
observations of asteroids, dust rings, and planets that provide new insight
into the formation and evolution of our Solar System. The key Spitzer results
presented here can be grouped into three broad classes: characterizing the
physical properties of asteroids, notably including a large survey of Near
Earth Objects; detection and characterization of several dust/debris disks in
the Solar System; and comprehensive characterization of ice giant (Uranus,
Neptune) atmospheres. Many of these observations provide critical foundations
for future infrared space-based observations.

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The categories of this paper are: nlin
30
The categories of this paper are: q-alg
17
The categories of this paper are: q-fin
22
The categories of this paper are: chao-dyn
16
The categories of this paper are: stat
31
The categories of this paper are: ao-sci
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The categories of this paper are: dg-ga
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The categories of this paper are: atom-ph
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The categories of this paper are: chem-ph
36
The categories of this paper are: cmp-lg
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The categories of this paper are: funct-an
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The categories of this paper are: hep-th
2
The categories of this paper are: math
33
The categories of this paper are: plasm-ph
25
The categories of this paper are: patt-sol
35
The categories of this paper are: mtrl-th