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BASIC EXTRAGALACTIC ASTRONOMY - Part 7: Galaxies - Morphological Diversity

Oct 07 2020 12:26 PM | rekokich in Articles

The only primary evidence available to an astronomer about a very remote object consists of photometric measurements, a spectrogram, and an image which is in many cases no more than a pinpoint of light. In this article we present basic cosmological concepts and simplified mathematical methods which allow an amateur to derive from this meager data a surprising number of physical properties of distant extragalactic objects with a precision of several percent within professional results.

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The Skies of October, 2020

Oct 06 2020 07:26 PM | cookman in This Month

Highlights: Comet Journal, Martian Landers, Meteor Showers, Planet Plotting, October Moon Focus Constellations: Ursa Major, Ursa Minor, Draco, Hercules, Lyra, Cygnus, Aquila, Pegasus, Andromeda, Cepheus, Cassiopeia, Perseus, Camelopardalis

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Cosmic Challenge: Spotting Uranus

Oct 01 2020 05:00 AM | PhilH in Phil Harrington's Cosmic Challenge

On March 12, 1781, the solar system was a simple, very well-behaved place that was best summed up with the phrase "what you see is what you get." There were the Sun, the Moon, and the five planets: Mercury, Venus, Mars, Jupiter, and Saturn. Apart from a handful of moons orbiting some of the planets and the occasional faint comet that required a telescope to be seen, the entire contents of the solar system was naked-eye territory.

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Review of the Hubble Optics 14 inch, f/4.6 Premium Ultra Light Dobsonian Telescope

Sep 29 2020 12:15 PM | Chris Westland in User Reviews

I looked at HO telescopes for some time before purchasing mine. On paper, the design is elegant, and takes advantage of the 6063-T6 aluminum alloy used in all of the telescope’s components. The sandwich mirror is innovative. The upper cage looks more rigid than a flat ring, but without being too heavy. In general the HO telescopes are unique and affordable. I am a previous owner of an Obsession Classic 20", and Dave Kriege’s scope set a standard for what I was expecting from a Dobsonian telescope.

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USING FILTERS FOR LUNAR/PLANETARY OBSERVATION

Sep 29 2020 11:57 AM | BillP in Articles

For the vast majority of my astronomical observing life, over 50 years, I have never used filters of any kind for planets or otherwise. But after half a century of reading the extraordinary claims by manufacturers and observing organizations alike about the many benefits of the various color filters on planets, I finally decided to give them a try myself to determine if what is written about them is more fact or is more fiction and hyperbole handed down over time.

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Observing Mars

Sep 27 2020 11:50 AM | Richard Bell in Articles

Here you go - Your guide to observing Mars during the Fall of 2020. A global dust storm spoiled the 2018 opposition, so let’s hope the Martian skies remain clear this Fall. Take advantage now. Do not wait until 2035! May your skies be steady and clear.

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The Skies of September, 2020

Sep 12 2020 12:28 PM | cookman in This Month

Highlights: Comet Journal, Martian Landers, Meteor Showers, Autumnal Equinox, Planet Plotting, September Moon Focus Constellations: Bootes, Ursa Major, Ursa Minor, Draco, Corona Borealis, Hercules, Lyra, Cygnus, Aquila, Pegasus, Andromeda, Cepheus, Cassiopeia, Perseus Comet Journals

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Cosmic Challenge: Ring Nebula Central Star and Galaxy IC 1296

Sep 01 2020 05:00 AM | PhilH in Phil Harrington's Cosmic Challenge

As we say goodbye to summer and get ready to welcome in autumn, I thought I would offer not one, but two challenges this month to bridge the seasonal change. Both appear right next to each other in our sky but are millions of light years apart. And both require all the aperture you can throw at them to be seen.

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My experience with the Starizona Landing Pad

Aug 29 2020 11:33 AM | emgeesea in User Reviews

I wanted to provide a review of my experience with a Starizona Landing Pad I recently purchased for my CPC 1100.

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A quick Review of the MIGHTY MAX 12V 100AH BATTERY

Aug 29 2020 11:16 AM | skunkwirks in User Reviews

I would highly recommend this battery for your portable equipment, I am convinced.

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