- APM 140mm DOUBLET APO REFRACTOR
- Comparison of the Boltwood II and Sky Alert Cloud Sensors
- Chile Dilly!
- MONO & BINO VIEWING WITH THE BAADER MORPHEUS 17.5MM EYEPIECE
- The Eye of the Flak (Das Auge der Flak)
- COMPARING THE MASUYAMA 25MM 52°, 25MM 65°, AND 26MM 85°
- BRESSER 4 Inch f 4.5 AR 102XS Refractor visual observers’ REVIEW
- New Moon Telescopes 16”f/4
- The Ages of Astrophotography 1839-2015
- Stardust Gallery LED Lightbox and Metallic Print Review
- Rayox Saddle Review
- MoonLite NiteCrawler Focuser
- Celestron Cometron 7x50s Review
- Astro-Devices (of Ukraine) Parallelogram Standard II Pro
- Review: Explore Scientific 16”, Europe edition, late 2016
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.
Oct 06 2018 07:16 AM | cookman in This Month
Highlights: Comet Journal, Martian Landers, Meteor Showers, Planet Plotting, Hallowe’en, October Moon Focus Constellations: Hercules, Aquila, Lyra, Cygnus, Pegasus, Pisces, Aries, Triangulum, Andromeda, Perseus, Camelopardalis, Cassiopeia, Cepheus, Draco, Ursa Minor, Ursa Major
Oct 01 2018 08:53 PM | PhilH in Phil Harrington's Cosmic Challenge
From an aesthetic perspective, the most perfect gravitational lens is Einstein's Cross, formed by the galaxy PGC 69457 (cross- cataloged as CGCG 378-15) and the quasar QSO 2237+0305 in Pegasus. PGC 69457 is also known informally as Huchra's Lens after its discoverer, John Huchra, professor of cosmology Harvard University. Current estimates place this small, otherwise unspectacular spiral galaxy at 400 million light years away. The quasar lurks far behind at an incredible distance of 8 billion light-years. Were it not for gravitational lensing, the quasar would remain hidden by the galaxy, as the two are nearly in-line as seen from Earth. But as it is, Huchra's lens fractures the ancient light from the quasar into four separate paths that slide around the galaxy just as water flows around a rock in a stream. The end result is not one, but four ghostly images of QSO 2237+0305 surrounding the nucleus of PGC 69457 in a practically perfect diamond pattern.
Sep 12 2018 08:26 PM | SiriusLooker in Articles
I first met Mike Clements (known to others as 1.8 meter Mike) in the early 90's. I had been delayed due to work at home for a trip to the Texas Star Party. By the time I arrived at the Texas ranch entrance, it was well after dark. As I was pulling in, I noticed a pickup truck on the right side of the road (outside of the ranch), and it had a large pole structure sticking up on the other side of it that my headlights caught briefly as I made my turn into the ranch. Unknown to me it was Mike, who had his 41 inch scope setup at the entrance of the ranch. In the early 90's it was very rare to see a 30 inch reflector, let alone over a 40 inch scope.
Sep 10 2018 11:36 AM | rekokich in Articles
In 1975 astronomer Michael Hart proposed the Fermi Paradox, implying a contradiction between the lack of direct evidence for extraterrestrial intelligence (ETI) and the presumed probability that they exist in substantial numbers. Recently, Oxford researchers Sandberg, Drexler, and Ord applied the Monte Carlo simulation to the Drake equation, and concluded that there is up to 99.6% probability that we are alone in the Milky Way galaxy, and up to 85% probability that no other intelligent life exists in the entire observable universe.
Sep 10 2018 08:35 AM | Larry Carlino in User Reviews
Some two dozen observing sessions and direct comparisons with instruments of known quality have convinced me that this APM 140ED is indeed an excellent telescope. It is well built, nicely finished, and it boasts very fine optical quality. In addition, its relatively light weight and short tube length allows the effective use of a mid-size equatorial or alt-azimuth mount. It has almost the punch of a 6-inch refractor in a package that is clearly more portable.
Sep 06 2018 10:29 AM | Pbinder in Articles
Greeting to all who are interested in the universe! The following guide is for people such as me who have an interest in viewing the night sky, purchased a telescope and now are lost. I am only in my first months of observing, so my perspective and understanding are more attune to starters. It appears overwhelming at first. Fear not!
Sep 04 2018 08:03 AM | cookman in This Month
Highlights: Comet Journal, Martian Landers, Meteor Showers, Planet Plotting, Fall Equinox, September Moon Focus Constellations: Bootes, Corona Borealis, Hercules, Ophiuchus, Aquila, Lyra, Cygnus, Cepheus, Draco, Ursa Major, Ursa Minor, Cassiopeia, Perseus, Andromeda, Pegasus
Sep 01 2018 05:07 PM | PhilH in Phil Harrington's Cosmic Challenge
The North America Nebula (NGC 7000) is a large expanse of glowing hydrogen gas mixed with opaque clouds of cosmic dust just 3° east of Deneb [Alpha (α) Cygni] and 1° to the west of 4th-magnitude Xi (ξ) Cygni. Famous as one of the most luminous blue supergiants visible in the night sky, Deneb marks the tail of Cygnus the Swan, or if you prefer, the top of the Northern Cross asterism.
Aug 04 2018 09:48 PM | cookman in This Month
Highlights: Comet Journal, Martian Landers, Meteor Showers, Planet Plotting, August Moon Focus Constellations: Coma Berenices, Bootes, Corona Borealis, Hercules, Ophiuchus, Aquila, Lyra, Cygnus, Cepheus, Draco, Ursa Major, Ursa Minor, Cassiopeia, Andromeda, Pegasus