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What is IAAC?

What is "Deep-Sky"? (+ links)

Email Access to IAAC

History of IAAC

Find a Deep-Sky Object...

The Observation Archive...

The DISCUSSION Archive...

Enter Your Own Observation!

Frequently Asked Questions

Subscribing to the List!

NetAstroCatalog -
a mailing list for "deep sky" observers of all levels

What is the Internet Amateur Astronomers Catalog (IAAC)?

The Internet Amateur Astronomers Catalog (IAAC or 'netastrocatalog' for short) is a forum for amateur astronomers at all levels to share their observations of Deep-Sky objects. (The 'deep-sky' includes all objects which are NOT members of our solar system: other galaxies, star clusters, gaseous nebulae, doubles, and variable stars are all deep-sky objects). Note that the netastrocatalog is a *catalog of amateur observations*, not a sales catalog of any kind!

If you'd like to submit your OWN observation of any astronomical object, please fill out the following Web form with your observation:

Or, if you use one of the wonderful observation-planning applications out there, such as Jeff Bondono's dObjects or DeepSky2000, you may simply be able to submit your observations to the IAAC via a menu item in your application. Ask your software author about this!

Once you submit your observation to netastrocatalog, it will appear on the World Wide Web along with countless other amateurs' efforts, within a week or so. In addition, all 'netastrocatalog' subscribers will see your submission immediately! The whole (LARGE) archive of previous logs is available at:

Or you may search for observations of a particular object at:

Finally, there is a mechanism for searching observations via email, using the 'retrieve' command in MajorDomo. If you would like to find out more about this, email the list administrator.

Last but not least, if you submit your logs to any of the deep-sky observing societies, then you may simply "Cc:" your observation posting to their respective email addresses as well! The Webb Society for instance, has indicated that our format is acceptable to them.

NOTE: In addition to the main 'netastrocatalog' list (which is only intended for observations by amateur astronomers), all participants are also automatically subscribed to a mailing list for DISCUSSIONS and ANNOUNCEMENTS relating to the IAAC, called netastrocatalog-announce. Again, by subscribing to either of these two lists, you are actually automatically subscribing to BOTH. Similarly, unsubscribing from either automatically unsubscribes you from both.

Clear skies!

What are "Deep-Sky Objects" anyway? For those interested in learning more quickly, here are three sites with excellent explanations of the soul and the substance of amateur deep-sky observing: esporte net NDSOS's "What is Deep-Sky Observing?" Mark & Carolyn's DeepSky homepage Sky & Telescope Secrets of Deep-Sky Observing apostas online Every passion has its object, and the object of amateur astronomy is the visible Universe! casino portugal online But the Universe is a vast and complex place, so that even amateur astronomers have to classify the various things they see "Out There" based on observable characteristics: After all, casino online there are MANY different types of objects visible in our night (and daytime) skies. And each type of object may require its own distinct tools and skills to be well observed by us lucky amateurs. cassino online Perhaps the most natural dividing line in all of astronomy is that between objects which are gravitationally bound to Earth's Sun on the one hand カジノジャパン (the so-called "Solar System objects"), and everything which isn't on the other. We know many objects to be our fellow-travellers in orbit around the Sun: scommesse online these include eight known planets (excluding Earth), all of their moons (including our own Luna), dizzying numbers and types of asteroids, migliori casino online long- and short-period comets, "meteoroids" (the specks of dust that cause shooting stars), "zodiacal dust" - and of course the Sun and Earth themselves! casino online Beyond the gravitational grasp of Sol however, lies a vast well of emptiness, reaching all the way to the nearest stars, south africa online casino and then far, far beyond. Inhabiting this daunting vastness are a whole unearthly menagerie of different objects - essentially all of which can be seen with your own eyes, if you have a little knowledge and skill! Here are some of the basic types of objects which we amateurs love to observe in the Deep Sky, along with links to more info about each!

Lew Gramer <dedalus@alum.mit.edu>