JR's website on Deep Sky Astronomy - Contents

Map of the web

Restore the web frames


Welcome to this website, which is devoted to Deep Sky (DS) observing, my favorite hobby since long time ago, around 25 years. Deep Sky (or Deep Space) is the astronomy topic that covers all what is found beyond the Solar System, namely stars, stellar systems, dust and gas clouds, whose different manifestations ‑mainly nebulae, star clusters and galaxies‑ are not only physically amazing, but also awe‑inspiring sights to enjoy. The night sky is within reach of everybody. You just need binoculars, a dark place beyond the city lights, pristine skies, and a star atlas. I'd like to contribute to the promotion of deep sky observing offering you some articles and tools, the subjects I am more interested in:


    In the frame on the top (if you don't see frames, click here), several tools, deep sky maps, articles, observation reports, pictures, tools and a deep space catalogue

    How about a 120 pages PDF file with 5800 mini-maps of 1 degree each around the best deep sky objects, plotting stars up to 12.5 mag? And another PDF file listing the best 11000 DS objects with constellation maps? Graphics to predict the visibility of DSO and optimal detection magnifications? These and other tools can be found in Deep Sky Tools

    You will also find a discussion on instruments and star atlases for practicing Deep Sky. I have purchased recently two new Synta achromatic refractors, and  New:  these are the respective reviews (120 mm F/8.3 and 150 mm F/5).

    As a presentation, I have linked a small webpage on my observing place and some pictures of the major attraction of my city: the City of Arts and Sciences.

    I have also placed some visual observation reports included in my observer's logbook. Also,  my first impressions in CCD imaging with a Meade Deep Sky Imager. There are five galleries: Gallery 1, Gallery 2, Gallery 3, Gallery 4, Gallery 5, and   New:  Gallery 6

    There are some suggestions of deep sky objects to observe in winter, an overview to the constellation of Lyra and all globular clusters in Hercules and Ophiuchus (in Spanish).


    ... and on the left frame, some full-length articles and direct links to the galleries

    Some image collections taken with a color Meade Deep Sky Imager, starting as a newbie

    How to predict the visibility of stellar or nonstellar objects (if you want a PDF copy, follow this link; below you will find some tools on this)

    An article on the physical nature of my favorite DS objects: the planetary nebulae (origin and evolution), plus a catalogue listing the data for the 800 brightest PNs

    A comprehensive deep sky handbook (100 pages), including both astrophysical and observational aspects (this and the next 4 articles in this section are not translated).

    An article on the use of astronomical filters

    The application of binoculars to the different astronomy fields, particularly deep sky

    The most catastrophic events in star lives: the supernovae

    An article on the amazing starburst galaxy M 82


    Some tools - Another hobby that I like is programming. I have no formal instruction in programming (I'm a chemist, not a programmer), so the software is just a contribution of an aficionado. Anyway, I hope you will like it. I hope you will find the software, which is freeware, articles and documents useful. Everything in my website is offered without commercial intentions, as a gift to other amateur astronomers to grow up in their love to the sky.


    How about the largest sky atlas you can imagine? I have prepared the TriAtlas, a large deep sky atlas up to 12.6 magnitude, with thousands of deep sky objects, double and variable stars. Enjoy it!


    If you want to calculate the visibility of any deep sky object (stellar or nonstellar) by the three full methods, you may find useful this small program


If you were looking for an international society in this concern, I would warmly recommend the Webb Society. It gathers deep sky observers all over the world. So join it if you are seeking people able to lead you to the limits in DS observing.


Finally, have placed some other links of webs on deep sky. Just a few, the best I have found at the moment.