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2015 RASC Observer's Guide

By Tom Trusock


Join us as Tom Trusock takes a look at the 107th version of the venerable RASC Observer's Handbook.


Recent Additions

  • THE (UN)OFFICIAL CLOUDY NIGHTS ASTRONOMICAL GLO...

    Mar 31 2015 08:42 PM by wyee

    This glossary was complied largely from a thread called “Astronomy Terms for Fun” on the General Observing Forum of Cloudy Nights.

  • My Odyssey

    Mar 21 2015 05:54 PM by Gil V

    I think what Coulter did was remarkable. They made the best they could with what they had, and brought large apertures to the public at an unheard-of price.

    All things considered, I am thrilled with my Odyssey.

  • Review: Starlight Instruments Direct Drive System

    Mar 21 2015 05:31 PM by Maz929

    Starlight Instruments, Feather Touch’s new Direct Drive System is ultra high resolution focusing, in a class by itself.

  • Innovations Foresight On-Axis Guide and Starlig...

    Mar 17 2015 02:25 PM by GazingSkyward

    Would I recommend the ONAG?  Absolutely.  The benefits of near-infrared guiding on-axis are not simply theoretical, you can see them right there in your guide camera images and in the results that you take home at dawn.



This Month's Skies



Imaging/Sketching Contest


Recent Topics

User Reviews

  • My Odyssey

    Mar 21 2015 11:54 AM by Gil V

    I think what Coulter did was remarkable. They made the best they could with what they had, and brought large apertures to the public at an unheard-of price.

    All things considered, I am thrilled with my Odyssey.

  • Review: Starlight Instruments Direct Drive System

    Mar 21 2015 11:31 AM by Maz929

    Starlight Instruments, Feather Touch’s new Direct Drive System is ultra high resolution focusing, in a class by itself.

  • The Celestron C80 ‘ Regal’ Spotting scope. And...

    Mar 21 2015 07:54 AM by waxinggibbous

    In summation, if you’re like me and get the shakes taking your expensive glass into the bush, then you can do much worse than the C80 Regal.

  • Innovations Foresight On-Axis Guide and Starlig...

    Mar 17 2015 08:25 AM by GazingSkyward

    Would I recommend the ONAG?  Absolutely.  The benefits of near-infrared guiding on-axis are not simply theoretical, you can see them right there in your guide camera images and in the results that you take home at dawn.

  • The Celestron C90 Maksutov Cassegrain Telescope

    Mar 02 2015 05:00 PM by skyaddict

    For those of you starting out in astronomy, or simply looking for a small portable telescope for quick looks and travel, the C90 deserves further investigation. Indeed, at the price, it is difficult to justify not buying one!

  • William Optics Zenithstar 71ED and Twilight I M...

    Feb 28 2015 10:53 AM by Ahab

    Wow, it’s a match made in heaven! I can observe at the zenith without compromising the controls or OT or going into contortions. As a unit it’s light enough to carry in and out of the house or for reasonable distances. It’s solid, stable and can fit in my car when broken down.

  • Takahashi FS - 102 Fluorite Doublet Apochromat

    Feb 20 2015 08:49 AM by admin

    While my nine year old son and I were out in our rural backyard one clear evening this past Fall, my son gazed up into the sky and remarked on the endless number of stars visible to him. He was especially drawn to a couple of extraordinarily bright objects. " Hey dad, there's the North Star ", he exclaimed. As I looked up at the bright object that he was referencing, I advised him that he had found the planet Jupiter. "Wow", Jupiter, he said! I then proceeded to point out Saturn, Polaris, the alignment of the pointer stars in the Big Dipper to find Polaris, etc. I then ran into the house and dug out my old Minolta 10x50's and gave him a glimpse of M-42, of course, after outlining the asterism of Orion the Warrior.

  • If you want to Master your craft, read Lessons...

    Jan 07 2015 11:29 AM by AstroDad

    Lessons from the Masters: Current Concepts in Astronomical Image Processing (Springer, 2013.) edited by Robert Gendler is an essential addition to library of every serious astrophotographer. Gendler, who edited this 387 page work is himself a Master of the art and science of astrophotography with a rich portfolio of astrophoto accolades and achievements, including 107 NASA APOD selections. Gendler is a physician by profession and therefore technically an "amateur" astronomer. However he routinely teams with the world's leading professional observatories to create masterful images from their exquisite data sets.

  • Phone/Tablet Apps and the Practical Astronomer

    Jan 07 2015 10:32 AM by zubiriman

    How can an astronomer harness the great power of these new devices, without wasting enormous amounts of time figuring out what is really useful?

  • Celestron Ultima 80

    Dec 16 2014 05:54 PM by Gianluca67

    I had the opportunity to observe the sky with this spotting scope during my holidays last Summer. My Father in law happened to own the Celestron Ultima 80 for nature watching and shooting sport and had left the scope at his holiday house near the seaside where I spent my holidays with my family. The sky there is pretty good so you can see 5.0-5.5 magnitude stars with the unaided eye at the zenith.

  • 10 Micron GM1000HPS --- My Experience

    Dec 15 2014 12:54 PM by sayitfast

    My first setup was working OK for me. I had a Celestron 11 inch HD scope a Hyperstar, Atik camera and a Celestron CGEM mount. I was getting images that I thought were wonderful and was overall very happy. The one major pain point I had was set up time and accuracy of the mount using was not always a fast fun experience. I found the CGEM mount overall worked well but there were some things that frustrated me which I will not go into here. I also wanted to do more advanced imagery… namely Satellites and Comets and I wanted it to be as easy as possible of course.

  • Altair Astro Starbase Tripod Review

    Dec 07 2014 06:27 AM by Timothy Giles

    From the moment I saw it, to putting it together and using it over 3 months - I have been extremely happy with the Starbase. It costs a bit more than a T-Pod 130 but its specifications are also far greater. The build quality is as good as it gets, the design is engineered well and executed perfectly.

  • A Beginner's Look at GoTo Dobsonians and th...

    Dec 06 2014 05:50 PM by jayhall0315

    Overall, I really like the Orion XT10g. I give it 4.5 out of five stars. It takes the large apertures, lower cost and simple base of the classic Dobsonian design and upgrades it to allow modern motorized GoTo targeting for a complete newbie. The tracking is very good, and becomes excellent once PAE is performed for a specific section of the sky under observation.

  • Binocular review for 20X80 Konus Giants

    Dec 06 2014 05:28 AM by orion61

    Konus really knocked it out of the park with these. I have looked through other large binoculars costing 2-3X as much, with these as good or actually better!

  • Review & Comparison of Takahashi FS-128...

    Dec 03 2014 07:32 AM by werison

    Side-by-side comparison of the Takahashi FS-128 & TEC 140 apochromats, including observing solar system and deep sky targets.

  • Hutech IDAS LPS-P2 vs Chroma LoGlow

    Dec 01 2014 12:53 PM by whwiii

    As a testament to the fact that I purchase too many filters, I was given a Chroma LoGlow filter to test. So I've compared it the the Hutech IDAS LPS-P2 filter which many (including me) consider the gold standard light pollution filter.




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