The Global TAP schema is an attempt at a simple way to present a
union of all TAP_SCHEMA instances globally, where right now GloTS only
contains tables and columns. It is primarily intended as a quick (and
relatively dirty) way for data collection discovery until other means
are ready.
This tutorial employs the Aladin VO client to explore neutral
hydrogen shells around the SMC; it demonstrates using image servers,
catalog servers, and advanced overplotting within Aladin.
Within this use case you meet representatives of the most interesting
categories of celestial objects. From stellar clusters to galaxies.
All objects are from the Messier catalog that includes some of the
most viewed objects of the deep sky.
Within this case you discover the geometry of the orbit of the Moon
and the nature of its phases. As special case of the circumstances of
Moon's orbit, the use case introduces the eclipses, both of Moon and
Sun.
Within this use case you recognize a physical association of stars
close in space as opposed to a superpositon created by projection
effects of stars very far one from the others. The key measure is
distance derived from parallax. With the true members of the
association (open cluster) you create a Herzsprung-Russell diagram as
in the tutorial “the stars” (ivo://edu.gavo.org/eurovo/aida_stars).
The Herzsprung-Russell diagram of stellar clusters is very important
because of the low noise of few unrelated stars.
If used in the classroom this advanced use case requires a reasonable
understanding of histograms and bidimensional scatter diagrams. It is
also rather long to perform from beginning to end.
Within this use case you discover the shapes of galaxies and their
classification according to the Hubble diagram. You are offered
sequences of galaxies with different morphologies and are asked to
order them. The morphological classification of galaxies is still in
use even if we have discovered that the Hubble diagram "per se" has no
direct physical or evolutionary meaning. Besides introducing the main
shapes of galaxies, the use case offer a demonstration of the
classification process, a fundamental tool of astronomers.
The Earth rotates around its polar axis and orbits around the Sun:
the sky above us (the celestial sphere) is in constant apparent
motion. Stellarium is the perfect tool to demonstrate the motions of
the sky, the use of coordinates and to illustrate constellations.
Stars have different colors and luminosities. Following this tutorial
we will learn what star luminosity and color are, and which
information about stellar evolution we can obtain from them.
This tutorial will show how tabular data can be easily transferred
from Topcat to Aladin or the other way, and it will illustrate the
benefits of this inter-client communication for VO users. This is
shown with a quick look at filtering members of the Coma Cluster from
SDSS.
![To the extent possible under law, the publisher has waived all copyright and related or neighboring rights to GAVO's ADQL course. For details, see the `Creative Commons CC0 1.0 Public Domain dedication <http://creativecommons.org/publicdomain/zero/1.0/>`_. Of course, you should still give proper credit when using this data as required by good scientific practice. .. image:: /static/img/cc0.png :alt: [CC0]](/registry-search/?f%5Brights_facet%5D%5B%5D=To+the+extent+possible+under+law%2C+the+publisher+has+waived+all+copyright+and+related+or+neighboring+rights+to+GAVO%27s+ADQL+course.++For+details%2C+see+the+%60Creative+Commons+CC0+1.0+Public+Domain+dedication+%3Chttp%3A%2F%2Fcreativecommons.org%2Fpublicdomain%2Fzero%2F1.0%2F%3E%60_.++Of+course%2C+you+should+still+give+proper+credit+when+using+this+data+as+required+by+good+scientific+practice.%0A%0A..+image%3A%3A+%2Fstatic%2Fimg%2Fcc0.png%0A+++%3Aalt%3A+%5BCC0%5D%0A%0A&f%5Bsubject_facet_lc%5D%5B%5D=virtual-observatories){kind=link}