Author Archives: JR


About JR

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

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.

Path of Pluto in 2015 (wide field)

See Pluto in 2015

It’s been a fantastic year for Pluto, and it’s only going to get more so. What better time to make your first (or second!) attempt at spotting the dwarf planet? Read on for a few tips to help you locate this dim object in the summer sky.

NGC 4921

The Herschel Sprint

Experience Herschel’s “Night of Discovery” for yourself! Follow this guide to recreating William Herschel's amazing night covering 73 deep-sky delights.

Isolated Triplets of Galaxies

S&T contributor Steve Gottlieb has made available data distilled from the Karanchentseva catalogue and his own observations to assist you in your observations of isolated triplets of galaxies.

Generating an Ephemeris

Terry N. Trees show us how to create an ephemeris, a table showing a celestial object's calculated positions for a given time period, using JPL HORIZONS data.

Sequence of lunar eclipse images

Lunar Eclipse Roundup

Reports describing this morning's lunar eclipse are beginning to trickle in to our offices in Cambridge, Massachusetts.