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Joe Bergeron

About Joe Bergeron

Joe Bergeron is an amateur astronomer of 50 years experience, a former planetarium director, a space artist, and the author of ten novels. See more of Joe's work at www.joebergeron.com.

An Ode to Small Telescopes

April 2, 2023 by Joe Bergeron Filed Under: Astronomy Equipment

A small telescope faces the Milky Way. Image credit: Brian Ventrudo.

Sometime in 1955, Mr. David Coffeen of New Orleans, Louisiana came up with $75. In today’s currency, that’s about $700, a respectable sum. And what did Mr. Coffeen do with his hard-earned savings?

He purchased a telescope.

Which telescope? A Unitron altazimuth refractor with an aperture of just 40mm, less than that of most finder scopes today. It came with three eyepieces, a star diagonal, and a wooden storage case, because it was an honest astronomical instrument.

Mr. Coffeen used his telescope from atop his modest trailer home. There was a lot to see with that 40mm scope: loads of lunar detail, the rings of Saturn, the Galilean moons of Jupiter and a couple of belts, hundreds of double stars, many of the Messier objects, and a lot more [Read more…] about An Ode to Small Telescopes

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Filed Under: Astronomy Equipment

Faint Fuzzies in and Around Pegasus and Andromeda

December 23, 2019 by Joe Bergeron Filed Under: Deep Sky

The globular cluster M15 in the constellation Pegasus.
Image credit: Joe Bergeron.

I write this in late October. Every night, the sky is four minutes more wintry than it was the night before. For now, the sky is still dominated by the constellations most associated with Autumn, even as the Summer Triangle slides past the meridian and the Pleiades rise in the east.

The constellations of northern autumn, Pegasus and Andromeda, linger well into the winter months and offer many deep sky wonders for observers equipped with a good telescope. One recent autumn evening, as the Pleiades rose in the east, I set about looking for a handful of these sights in my 8-inch Edge HD Schmidt-Cassegrain telescope [Read more…] about Faint Fuzzies in and Around Pegasus and Andromeda

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Filed Under: Deep Sky

A Low-Power Romp in the Late-Summer Sky

September 13, 2019 by Joe Bergeron Filed Under: Deep Sky

Messier 24, the Small Sagittarius Star Cloud, at right. Image credit: Martin Heigen/Flickr.

Let’s follow last week’s sky tour with a pair of objects where low power is so essential that without it, you might miss them entirely. The first is the open cluster IC 4665, which lies a degree or two north of the star Beta Ophiuchi (Cebalrai). The cluster was “discovered” by astronomer after astronomer, but it didn’t make enough of an impression on anyone to stick around in the astronomical consciousness until it was finally added to the Index Catalog in 1908. In my little telescope at 18x I see a very scattered group of twenty or so easily seen stars spreading across a degree or more of sky. Try as I might, I could not imagine a compelling picture in this random assortment of star dots. Surrounding the most nearly crowded part of the cluster are a few more isolated pairs and individual stars that give the impression of being cluster members. This might be a better object for binoculars than for any telescope. [Read more…] about A Low-Power Romp in the Late-Summer Sky

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Filed Under: Deep Sky

Deep Sky Tour: Nebulae in Cygnus

September 7, 2019 by Joe Bergeron Filed Under: Deep Sky

The North America Nebula (left) and the Pelican Nebula (right). Image credit: Terry Hancock via Flickr.

In my previous sky tour, I talked up the virtues of observing deep sky objects using fairly high magnifications with a reasonably big 8-inch f/10 telescope. This time around, let’s veer to the opposite extreme and take a tour of a series of celestial objects that are best seen using small telescopes, low magnifications, and wide fields of view.

Cygnus, the Swan, which is as emblematic of northern-hemisphere summer as any other constellation, holds two of the best examples of wide-field objects which are visible nearly overhead in late northern summer, and low over the northern horizon for southern-hemisphere observers [Read more…] about Deep Sky Tour: Nebulae in Cygnus

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Filed Under: Deep Sky cygnus, veil nebula

The Disappearing Great Red Spot

July 26, 2019 by Joe Bergeron Filed Under: Solar System

Jupiter and the cyclonic feature known as the Great Red Spot, lower right, in 2019. New dissipative activity is shrinking and may be destabilizing this famous feature in Jupiter’s atmosphere. Image credit: Anthony Wesley.

Second only to the rings of Saturn, Jupiter’s Great Red Spot (GRS) is probably the most iconic planetary feature in the solar system. Unlike the rings, which aren’t going away any time soon, recent observations of an apparent unraveling of the GRS suggest big changes in this iconic feature, if not its impending demise [Read more…] about The Disappearing Great Red Spot

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Filed Under: Solar System great red spot, jupiter

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