The Celestron C90 Maksutov Cassegrain Telescope
Mar 02 2015 05:00 PM by skyaddict
William Optics Zenithstar 71ED and Twilight I M...
Feb 28 2015 10:53 AM by Ahab
If you want to Master your craft, read Lessons...
Jan 07 2015 11:29 AM by AstroDad
Celestron Ultima 80
Dec 16 2014 05:54 PM by Gianluca67
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Observing Skills Archives
The area in Hercules bordering Serpens Caput has always interested me due the remoteness of many of the visible galaxies in that area, many of which are members of the Hercules Supercluster over 500 million light years away.
Spring is not a season that presents a lot of deep sky objects to the irregular chunk of sky I can see from my tree crowded back yard
On the 28th of December, 2008, I found myself checking the Clear Sky Chart and seeing nothing but deep blue squares for the next three days
It was by chance that I acquired my first meteorite
My name is Ian candler. I am 50 yrs old and for the last 9 + yrs have been disabled due to a bad back injury
aboard the Caribbean Princess on February
Saturn, the jewel of our solar system, is best known for it’s spectacular rings and multitude of moons
It's always nice to keep a log on your observations.
The record of my binocular observing over recent vacation
As we spend so much time studying Orion over the Winter, it will do no harm at all to mention a few of the other objects that are visible apart from M42, the Great Orion Nebula
I decided to try my hand at a Messier Marathon this year - I'd never done one before and I've only been observing for a couple of years. If you haven't tried one, or if you have and want to compare it with your own
The list below are my compilation of 16 years of observation under Brazilian dark skies
The Lunar domes and their Characteristics
During the 1960's and 1970's heyday of space missions to Mars we learned that amateur observations were of vital importance to the safety of landing machines on that planet
The atmosphere interferes with the telescope's ability to see. Every beginner learns that axiom very quickly. First, we blame the scope
Everybody knows that for catching faint deep sky objects, one has to know exactly where to look at. We need a detailed star atlas to succeed, showing very faint stars. Imagine for a moment an atlas reaching the 12.5 magnitude. It would plot millions of stars and would include thousands of charts filling several volumes. Too bulky to carry with us, isn't it? However, what we really need to know in detail is only the neighbourhood of the deep sky object we are looking for. Why charting then with high detail "empty" areas which we are not really interested in? Think in how we do starhopping. First we use our finder, and with the only assistance of our favourite sky atlas (Herald-Bobroff, Sky Atlas 2000) we gradually move to the area. Then we look through the telescope to enlarge the area, look back again to our atlas, and... ops... our atlas does not plot anything of what we can see in the eyepiece field.
Highlights: Comet Journal, Martian Landers, Planet Plotting, Leonid Meteor Shower, Where Are We Now?, November Moon
Here are my impressions after nine months of extensive solar viewing and a couple of nocturnal sessions
I hope beginner's and experienced observers alike might find some use in these charts -- as a first atlas, as a bridge atlas between planishere and a deeper atlas, as a binocular atlas, as printable charts for outlining observing plans and/or recording small field notes, or to make wallpaper for your outhouse. At the very least, when you take family or friends on an observing outing it is easy (and affordable) to ensure everyone has an atlas of their own to refer to.
I always enjoy getting to the observatory ahead of time. I like observing in the evening to early morning and, I like getting up early to observe as long as I have some significant observing time before dawn
In the north woods, Spring comes much later than in most places, but it generally starts near the end of April. By then the only remaining evidence of winter are patches of snow left in the woods beneath the shade of thick evergreens. The smelt are beginning their yearly trek up stream, and it won't belong
Stray light reflected off inner tube walls in Newtonian & Dobsonian telescopes has been a subject of increasing concern in recent years by Amateur Astronomers. Small portions of this light finds its way to the image plane, where it can significantly diminish resolution and contrast. The degree of image deterioration is directly determined by the degree of reflectance at the inner tube surface. Therefore, in order to achieve the best possible performance, it is critically important to have this reflectance reduced to a possible minimium, particularly in unbaffled tubes. Current methods to reduce this stray light have been to flock the inside walls either
Today we, amateur astronomers, have an immense array of equipment at our disposal. We have telescopes that can find their own way through the sky and even tell us what we are looking at. Some telescopes are even capable
The Airy disk radius is measured from the midpoint of the central diffraction disk to the minimum of the first diffraction interspace. The central diffraction disk, sometimes confusingly referred to as the Airy disk, is somewhat smaller than the true Airy disk.