Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Constraining the Heliosphere: The Need for High-Resolution Observations
  of Nearby Interstellar Matter   High-resolution ultraviolet observations of nearby bright and faint stars are
required to evaluate changes in the past and future galactic environments of
the Sun, and the possibly impact of these changes on the interplanetary
environment at 1 AU (around the Earth). The boundary conditions of the
heliosphere and interplanetary environments are constrained by the
characteristics of the surrounding interstellar material (ISM), which changes
on timescales of 10^3-10^5 years. An increase in the density of the
interstellar cloud surrounding the solar system to 10 cm^-3 decreases the
heliosphere radius by about an order of magnitude. UV observations of nearby
stars at high spectral resolution (>300,000) and high signal-to-noise are
required to evaluate future modifications to heliosphere properties by the ISM.

7
The categories of this paper are: hep-th
8
The categories of this paper are: hep-ex
33
The categories of this paper are: plasm-ph
12
The categories of this paper are: nucl-th
3
The categories of this paper are: physics
9
The categories of this paper are: nlin
36
The categories of this paper are: cmp-lg
35
The categories of this paper are: mtrl-th
28
The categories of this paper are: alg-geom
5
The categories of this paper are: gr-qc
24
The categories of this paper are: dg-ga
26
The categories of this paper are: bayes-an
18
The categories of this paper are: econ
22
The categories of this paper are: chao-dyn
27
The categories of this paper are: comp-gas
30
The categories of this paper are: q-alg