Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Proving Heliocentrism and Measuring the Astronomical Unit in a
  Laboratory Astronomy Class via the Aberration of Starlight   The objective reality of the Earth's motion about the Sun was finally proven
observationally by Bradley (1727) when he correctly explained the ~20'' annual,
elliptical motions of stars as being due to aberration of starlight caused by
the motion of the Earth. This effect can be detected today with ordinary
astrophotographic equipment by measuring the coordinates of the center of star
trails, which reveal the apparent position of the Celestial Poles, which vary
due to the aberration of starlight, in addition to the effects of the nutation
and precession of Earth's Poles. Despite my aspirations, I have not found the
time to even begin the project of measuring the aberration. I nonetheless feel
that it is a rich project in observational astronomy and fundamental physics,
and a pleasingly didactic exercise appropriate for upper-division undergraduate
and graduate astronomy and physics laboratory classes, whose complexity and
length may be justified by the novelty of proving heliocentrism with nothing
but a small telescope and camera.
  I therefore publish this Research Note to disseminate the idea in hopes that
I might receive word in a few years of a triumphant astronomy class's proof of
heliocentrism, along with their best estimates of the astronomical unit and
precession.

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The categories of this paper are: cmp-lg
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The categories of this paper are: q-alg
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The categories of this paper are: hep-ph
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The categories of this paper are: plasm-ph
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The categories of this paper are: chem-ph
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The categories of this paper are: math
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The categories of this paper are: adap-org
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The categories of this paper are: q-bio
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The categories of this paper are: comp-gas
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The categories of this paper are: cs
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The categories of this paper are: nucl-th
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The categories of this paper are: nlin
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The categories of this paper are: mtrl-th
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The categories of this paper are: supr-con
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The categories of this paper are: solv-int
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The categories of this paper are: atom-ph