- Review of the Hubble Optics 14 inch, f/4.6 Premium Ultra Light Dobsonian Tele...
- My experience with the Starizona Landing Pad
- A quick Review of the MIGHTY MAX 12V 100AH BATTERY
- Nexus II Review
- New Moon Telescopes 20”F/3.3 Review
- FIELD TEST OF THE BAADER MAXBRIGHT® II BINOVIEWER
- My Experience using SkyWatch for the Alphea All Sky Camera from Alcor Systems
- Astroart 7 - A Review and "How To" (Part 1)
- My experience using two 80-millimeter long-focus refractors
- GSO 8-inch TRUE CASSEGRAIN
- Celestron Regal 65ED M2
- Review: The Vixen FL55ss
- PrimaLuceLab Eagle Review
- interstellarum Deep Sky Guide Desk Edition
- Chronicling the Golden Age of Astronomy: A History of Visual Observing from...
CNers have asked about a donation box for Cloudy Nights over the years, so here you go. Donation is not required by any means, so please enjoy your stay.
Aug 29 2020 10:52 AM | xrayvizhen in User Reviews
SUMMARY: The Nexus II is an outstanding piece of equipment that allows anyone to use their Smartphone or tablet and see where their telescope is precisely pointed. It is an extremely cost effective and easy way for someone to add digital setting circles and a “Push-To” function to just about any telescope.
Aug 23 2020 12:32 PM | ilan_shapira in User Reviews
This instrument answers to all my requirements from a big dob and is mostly used during my dark site trips. While double stars and planets are not the specialty of this scope, it handles them fairly well, but requires extra good conditions - backyard usage is not optimal as atmospheric disturbances dramatically affect the views. DSOs is where this instrument excels and provides the best performance under dark skies, especially with faint galaxies. During my last dark site session, after the COVID-19 restrictions lifted, I had barely time to observe myself as others lined up to view instead.
Aug 16 2020 10:08 AM | tom_fowler in Articles
I decided to compare three telescopes to determine how they image two stars: Vega (type A0) and Albireo (types K3 and B9). Albireo turns out to be the difficult test because of the color contrast of its two components. The fainter component, Albireo B, is coincidentally a B-type star, which accounts for its readily observed blue color. The brighter star, Albireo A, is a K type star, with a yellowish-orange color typical of such cooler stars. Vega, as a type A star, is not as hot and not as blue as Albireo B. This turned out to be apparent in course of the tests that I did.
Aug 08 2020 01:53 PM | cookman in This Month
Highlights: Comet Journal, Martian Landers, Meteor Showers, Planet Plotting, August Moon Focus Constellations: Coma Berenices, Bootes, Ursa Major, Draco, Ursa Minor, Perseus, Andromeda, Pegasus, Cassiopeia, Cepheus, Cygnus, Aquila, Lyra, Ophiuchus, Hercules, Corona Borealis
Aug 01 2020 05:00 AM | PhilH in Phil Harrington's Cosmic Challenge
The sky is full of weird sights. And among planetary nebulae, NGC 6445 is one of the strangest. Discovered by William Herschel on May 28, 1786, NGC 6445 shines at 11th magnitude. That's bright enough to be seen even through giant binoculars. Although visible in smaller apertures, it takes a 6-inch telescope for NGC 6445's true, if bizarre, nature to shine through. The nebula's brighter central shell looks like a dented rectangle. Nature rarely creates an amorphous form with sharp edges, and indeed, the peculiar appearance of NGC 6445 is due largely to our perspective as well as its age. But the look is very odd nonetheless. No wonder NGC 6445 has been nicknamed the Box Nebula.
Jul 11 2020 11:04 AM | JoeR in Articles
Whether with an eyepiece or a camera, observing intergalactic supernovae connects you to the awesome power of creation from destruction. When we observe a supernova we are witnessing the final moment in the life story of massive star and a cataclysmic event beyond all human experience- one that makes its fury known across half the Universe. Yet, we are also seeing the unmistakable hints of our own origins. Life as we know it could not exist without the elements forged in the nuclear furnace of a high mass star long ago. That star ripped itself to shreds in a violent death so it could deliver the building blocks of life when our solar system was born.
Jul 11 2020 10:48 AM | 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.
Jul 06 2020 03:00 PM | PhilH in Phil Harrington's Cosmic Challenge
Seyfert's Sextet, known to many as Hickson Compact Galaxy Group 79, is a tight gathering of galaxies in the northern corner of Serpens Caput. Serpens Caput is the western segment of this bisected constellation, marking the triangular head of the serpent that Ophiuchus is handling. Observing Seyfert's Sextet has been one of my pet projects for years. It's a fun little galactic rat pack for summer outings before we plunge headlong into the summer Milky Way.
Jul 06 2020 02:38 PM | cookman in This Month
Highlights: Comet Journal, Martian Landers, Meteor Showers, Summer Solstice, Planet Plotting, June/July Moon Focus Constellations: Leo, Coma Berenices, Bootes, Ursa Major, Draco, Ursa Minor, Cassiopeia, Cepheus, Cygnus, Aquila, Lyra, Ophiuchus, Hercules, Corona Borealis