Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Possible scenarios that the New Horizons spacecraft may find in its
  close encounter with Pluto   Next year, 2015, the New Horizons spacecraft will have a close encounter with
Pluto. In the present study we discuss some possibilities regarding what the
spacecraft may encounter during its approach to Pluto. Among them we should
include: the presence of geological activity due to heat generated by tides;
the unlikely presence of an intrinsic magnetic field; the possibility of a
plasmasphere and a plasmapause; the position of an ionopause; the existence of
an ionospheric trans-terminator flow similar to that at Venus and Mars; and the
presence of a Magnus force that produces a deflection of Pluto plasma wake.
This deflection oscillates up and down in its orbit around the sun.

33
The categories of this paper are: plasm-ph
24
The categories of this paper are: dg-ga
5
The categories of this paper are: gr-qc
8
The categories of this paper are: hep-ex
30
The categories of this paper are: q-alg
28
The categories of this paper are: alg-geom
18
The categories of this paper are: econ
25
The categories of this paper are: patt-sol
36
The categories of this paper are: cmp-lg
19
The categories of this paper are: eess
23
The categories of this paper are: solv-int
4
The categories of this paper are: cond-mat
29
The categories of this paper are: funct-an
11
The categories of this paper are: hep-lat
9
The categories of this paper are: nlin
22
The categories of this paper are: chao-dyn