Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Oumuamua Is Not a Probe Sent to our Solar System by an Alien
  Civilization   Oumuamua, the first known object of extrasolar origin seen to enter our Solar
System, has multiple unusual characteristics that, taken together, are very
difficult to explain with conventional astronomical entities like asteroids and
comets. Consequently, it has been hypothesized that Oumuamua is an interstellar
probe that was constructed by an alien civilization. We demonstrate that the
accomplishments that can be achieved with large space
telescopes/interferometers in the alien's planetary system will completely
quench any motivation for construction and launch of an Oumuamua-like probe.
The absence of any such motivation proves that Oumuamua is not an alien
creation.

1
The categories of this paper are: cs
12
The categories of this paper are: nucl-th
32
The categories of this paper are: atom-ph
18
The categories of this paper are: econ
33
The categories of this paper are: plasm-ph
13
The categories of this paper are: quant-ph
24
The categories of this paper are: dg-ga
31
The categories of this paper are: ao-sci
10
The categories of this paper are: q-bio
35
The categories of this paper are: mtrl-th
30
The categories of this paper are: q-alg
7
The categories of this paper are: hep-th
25
The categories of this paper are: patt-sol
4
The categories of this paper are: cond-mat
26
The categories of this paper are: bayes-an
11
The categories of this paper are: hep-lat