Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The microwave sky after one year of Planck operations   The ESA Planck satellite, launched on May 14th, 2009, is the third generation
space mission dedicated to the measurement of the Cosmic Microwave Background
(CMB), the first light in the Universe. Planck observes the full sky in nine
frequency bands from 30 to 857 GHz and is designed to measure the CMB
anisotropies with an unprecedented combination of sensitivity, angular
resolution and control of systematic effects. In this presentation we summarise
the Planck instruments performance and discuss the main scientific results
obtained after one year of operations in the fields of galactic and
extragalactic astrophysics.

11
The categories of this paper are: hep-lat
31
The categories of this paper are: ao-sci
14
The categories of this paper are: math-ph
20
The categories of this paper are: acc-phys
12
The categories of this paper are: nucl-th
37
The categories of this paper are: supr-con
2
The categories of this paper are: math
10
The categories of this paper are: q-bio
3
The categories of this paper are: physics
33
The categories of this paper are: plasm-ph
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The categories of this paper are: solv-int
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The categories of this paper are: hep-ex
1
The categories of this paper are: cs
0
The categories of this paper are: hep-ph
26
The categories of this paper are: bayes-an
4
The categories of this paper are: cond-mat