All Tele Vue telescopes now come standard as optical tube assemblies (OTA) that can be turned into “complete” units with optional, customized accessory packages. The package costs can be substantially less than pricing each component individually. This blog takes you through the changes for the Tele Vue-60, Tele Vue-76, and Tele Vue-85 models. Accessory packages for the larger scopes will be covered in a future blog.
The changing face of the moon has long been documented by artists. In the early 1600’s, the introduction of the telescope allowed for detailed sketching of lunar features at the eyepiece. The most celebrated early telescope sketcher was Galileo Galilei. His artistic training allowed him to understand that the jagged appearance of the lunar terminator (day/night line) seen in the eyepiece was due to the topography of craters, mountain, and ridges on the moon. These irregular shadows on the moon had puzzled earlier observers that considered the moon to be a flat disk with markings on it.
By the 1970s amateurs had noticed that all 110 Messier objects could be observed at low northern latitudes over the course of a night in mid-to-late March.
You’ve probably heard of Charles Messier’s catalog of celestial deep-sky objects for 18th century comet hunters. When they stumbled upon an unknown faint fuzzy object, they’d consult this list to see if it was a known object. It was first published in 1774 and expanded with help from fellow observers in that century. Astronomers and amateurs in the early 20th Century rediscovered it, added a few new objects, and made corrections. There are now 110 “M” objects in the modern catalog.
Every sky chart labels the location of these objects with the letter “M” and a number. For instance, the brightest Messier is M45 — the famous naked-eye Pleiades open star cluster. A third of the way around the sky you’ll find the dimmest: M95 — a galaxy of magnitude 10 or 11 (depending on the source) in Leo.
We spotted some great Tele Vue-NP127is images on Instagram and AstroBin recently. They are the work of a collaboration between Niels Christensen and other amateurs from Denmark. We contacted Niels to learn more.