Other projects I developed.

A web ephemerides server that produces accurate astronomical ephemerides of solar system bodies is now available. To have a good performance, the accuracy is intenctionally slightly below that of the JPL Horizons for dates far from year 2000 (in current dates accuracy is similar), but the quality of the charts and the interactivity and performance when simulating astronomical events if by far above any other web tool. In addition, probably you have never seen such a level of completeness and detailed data. Current version is available in Spanish and English.

Here are some interesting phenomena you can simulate interactively with this ephemerides server (using the applet described below):

• Venus transit in 2012: not visible from Madrid (Spain), so it will appear in RA vs DEC coordinates instead of azimuth vs elevation.
• Occultation of Calisto by Io: April, 5, 2009 (57.4% of occultation). Zoom in Jupiter satellites using the mouse wheel. Mutual phenomena are calculated and simulated in the planetary section.
• Triple eclipse in Jupiter: March, 28, 2004. See APOD for November, 11 2004 to compare with a Hubble image.
• Titan and Mimas transits with shadows: February 24, 2009. Another link for Mimas, Enceladus, Dione, and Titan transiting simultaneously.
• Stars up to magnitude 16 in the globular cluster M13: the applet will query UCAC3 catalog using Vizier server to show all stars up to magnitude 16. Another possibility is to zoom in some galaxies in Ursa Major where some supernova have been discovered recently.
• Europa occulted by Io: May 21, 2009, 05:31 UT1.
• Europa eclipsed by Callisto: June 2, 2009, 01:50 UT1.
• And, of course, the sequence for any solar/lunar eclipse. For instance, the Lunar eclipse on June 15, 2011.

A multiplatform (maybe biggest ever?) applet that simulates the sky and the planets as seen from a given place and with a given telescope and ocular. Java 1.6 is required to launch this program, and Spanish and English versions are included. Download it here and enjoy it!

You can also try it online in English or in Spanish. In the first execution the applet requires to download more than 30 MB of data.

”This is extraordinary. I have not seen anything even close to this as a Java routine anywhere else. Thank you very much for providing the applet. We will explore it and then have students give it a test drive too”, John Kielkopf, Professor of Physics and Astronomy, University of Louisville, USA.

The applet was updated for the last time on April 17, 2013.

Windows program to learn astronomy. It was made as my final degree project with Windows 95 graphic libraries (a long time ago!) and using Fortran 90. It was so nice that I decided to never use Fortran or those graphic libraries again anymore. The monster can still be executed in XP, but be sure to maximize the window and put it at the top left corner. Download it here (or here for the Spanish version) and enjoy!

Several applets that shows the Solar System, the sky, and artificial satellites. Also quite old. They can be downloaded here.

• Solar System Simulator: here. Small version between years 1900 and 2100 AC.

• Solar System Simulator: big Spanish version between 1000 B.C. and 3000 A.C. here.

• Artificial satellites: here. In Internet Explorer say yes to the question that pops up to automatically download updated orbital elements, in other browsers say no.

• Sky: here.

An applet to explore certain places based on photographs taken from every possible direction. Quite old, but funny. There are two virtual visits available:

• IRAM 30m telescope: visit the 30m radiotelescope at Loma Dilar (close to Veleta peak at Granada, south of Spain). Download it from here, or see it online here.

• Barco de Ávila: visit the little village where I spend my holidays, located at the central-west part of Spain. Download it from here, or see it online here.