Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: From Protoplanetary Disks to Extrasolar Planets: Understanding the Life
  Cycle of Circumstellar Gas with Ultraviolet Spectroscopy   Few scientific discoveries have captured the public imagination like the
explosion of exoplanetary science during the past two decades. This work has
fundamentally changed our picture of Earth's place in the Universe and led NASA
to make significant investments towards understanding the demographics of
exoplanetary systems and the conditions that lead to their formation. The story
of the formation and evolution of exoplanetary systems is essentially the story
of the circumstellar gas and dust that are initially present in the
protostellar environment; in order to understand the variety of planetary
systems observed, we need to understand the life cycle of circumstellar gas
from its initial conditions in protoplanetary disks to its endpoint as planets
and their atmospheres. In this white paper response to NASA's Request for
Information "Science Objectives and Requirements for the Next NASA UV/Visible
Astrophysics Mission Concepts (NNH12ZDA008L)", we describe scientific programs
that would use the unique capabilities of a future NASA ultraviolet
(UV)/visible space observatory to make order-of-magnitude advances in our
understanding of the life cycle of circumstellar gas.

14
The categories of this paper are: math-ph
25
The categories of this paper are: patt-sol
13
The categories of this paper are: quant-ph
28
The categories of this paper are: alg-geom
7
The categories of this paper are: hep-th
29
The categories of this paper are: funct-an
17
The categories of this paper are: q-fin
35
The categories of this paper are: mtrl-th
12
The categories of this paper are: nucl-th
10
The categories of this paper are: q-bio
33
The categories of this paper are: plasm-ph
15
The categories of this paper are: nucl-ex
3
The categories of this paper are: physics
5
The categories of this paper are: gr-qc
16
The categories of this paper are: stat
24
The categories of this paper are: dg-ga