Within this use case you learn about motion of the planets both
around the Sun and in the sky, planetary conjunctions and what might
have been the Star of Bethlehem.
Within this use case you learn about Kepler's laws, a cornerstone of
astronomy and a fundamental brick of both Newton's and Einstein's
theories of gravitation. This use case is complemented by use cases 10
and 16 (at different levels of difficulty.
This tutorial introduces a few techniques for working with image
services in the Virtual Observatory (VO) in general, using services
containing plate scans as examples. It will discuss both exploratory,
interactive use, and scripting using pyVO.
Within this case you learn that stars that seem "fixed" on the sky
may actually move, even if their motion is so slow for the naked eye
to be undetectable. You compare two photographs of the Barnard's Star
taken several years apart and will be able to estimate its
displacement on the sky. Your estimate will be very close to actual
measurements.
This authority is used by the purx publishing registry proxy and
hence contains records from (potentially) a multitude of publishers
that just put their registry records on a common web server. Problems
with actual records served here should be reported to the resources'
contact addresses first. Non-responsive contacts should be reported to
the contact persons of this authority.
This is the OAI-PMH endpoint of the purx publishing registry proxy.
purx lets you publish VOResource records by just putting XML into a
web browser. For details, see http://dc.g-vo.org/PURX.
Shomydl shows Datalink_ documents in a web browser using the
`XSLT used in DaCHS`_. It is meant to give authors of such documents
an idea of how clients would interpret their document.
.. _Datalink: http://ivoa.net/documents/DataLink/
.. _XSLT used in DaCHS: https://github.com/msdemlei/datalink-xslt