Author Archives: JR

JR

About JR

S. N. Johnson-Roehr is an Associate Editor at Sky & Telescope. She favors Vega and the Double Double.

Hickson Compact Groups

Contributing Editor Ted Forte offers a look at Hickson Compact Groups in the November 2017 issue of Sky & Telescope. In 1982, Canadian astronomer Paul Hickson published a list of 100 compact galaxy groups based on his examination of the Palomar Observatory Sky Survey (POSS) red plates. A compact group, as defined by Hickson, is…

Abell 194 Galaxy Cluster

Abell 194

Sky & Telescope Contributing Editor Ken Hewitt gives us a guided tour through Abell 194, a visually rich galaxy cluster in Cetus.

Star Party Season

Summer means star parties, and star parties mean fun. Read about my adventures at the annual Cherry Springs and Table Mountain gatherings.

Observing Notebooks

Sky & Telescope's Observing Editor offers a few suggestions to help you set up your first (for fifth!) observing notebook. Feeling inspired after reading Contributing Editor Bob King’s article on observing notebooks in the September 2017 issue of Sky & Telescope but need help starting a notebook? Here are a few different ways to approach…

Messier 17 Sketch Howard Banich

Beyond the Printed Page: Messier 17

No matter what you call it, Messier 17 is one deep-sky object to which you'll find yourself returning throughout your observing life. In our September 2017 issue, Contributing Editor Howard Banich examined the science and history of Messier 17, an H II region in Sagittarius also known as the Swan Nebula, Omega Nebula, Checkmark Nebula,…

20 Draconis

Draco Double Stars

Contributing Editor Matt Wedel offers more double and multiple stars to look for in and around the head of the constellation Draco, the Dragon.

Abell Planetaries

If you're looking for an observing challenge, George Abell's complete catalog of planetary nebulae has you covered. I observed my first planetary nebula by accident. I was moving the optical tube of my new telescope up and down, back and forth, nearing epic levels of frustration as I hunted for anything that didn't look like…

Hercules Galaxy Cluster.

Hercules Galaxy Cluster: Going Deep

To aid your observing endeavor, Contributing Editor Steve Gottlieb has provided an expanded table of galaxies, with their position angles, visual magnitudes, size, and positions.

Trifid Nebula sketch

The Trifid Nebula

Here's some further reading on the stages of star formation visible in the Trifid Nebula, subject of the May 2016 issue's Going Deep column.

NGC 3172 by David Ratledge

Circumpolar Galaxies

On a single night at a remote site, Contributing Editor Steve Gottlieb observed 35 circumpolar galaxies. Here we're providing a complete list of those 35 galaxies,

Elliptical Galaxy IC 2006

Monster Galaxies

Take advantage of early evenings and dark winter skies — turn your scope southward to view some of the most massive objects in the universe.