Finding data for a given source This thread illustrates how to answer a typical VO question: what sort of data do exist for an astronomical sources? And how do I find them and access them? We use Aladin to answer this question and accomplish this task with just a few mouse clicks.

Finding images for a given source This thread illustrates how to answer a typical VO question: do images in a given wavelength range exist for an astronomical source? If so, how do I find them and display them?? We use Aladin to answer this question and accomplish this task with just a few mouse clicks.

How to generate the Spectra Energy Distribution of a source in an image This thread illustrates how to answer a typical VO question: do spectra in a given wavelength range exist for source in my field-of-view? Can I seamlessly build their Spectral Energy Distribution? The interoperability between Aladin (catalogue browsing, image visualization) and VOSpec (Spectral Energy Distribution visualization and analysis) allows you to answer these questions and accomplish these tasks with just a few mouse clicks.

How to generate and analyze Spectral Energy Distributions This recipe shows how to generate and display a Spectral Energy Distribution with VOSpec, combining spectra from various observatories in different energy bands, as well as user-produced spectra uploaded from the local disk. It also illustrates the usage of simple fitting tools in VOSpec, as well as the access to theoretical models and absorption/emission line databases, which have been incorporated in Virtual Observatory servers around the world.

Visualising, manipulating and cross-correlating catalogs There are a number of tools available for visualising, manipulating and cross-correlating catalogs. Some of these tools are applications that are downloaded and run on the desktop, some can be started with "webstart" technology and others may be used as a service where the calculation is performed on a remote computer.

Or try performing some Common Astronomical Tasks using the VO