What is a solar flare? Flares are spikes in emission from the Sun, energy unleashed (we’re fairly sure) when magnetic field lines suddenly reconnect. Read more about them and watch fascinating videos in this online extra to our November 2015 cover story.
Watch in-depth conversations between Dennis di Cicco and astronomy vendors to find full details on hot new products and featured equipment.
iOptron’s chief engineer Kevin Zou takes Sky & Telescope on a tour of the company’s extensive line of telescope mounts and camera tracking platforms.
Sky Watcher product specialist Kevin LeGore gives an overview of the company’s latest offering of telescopes.
Learn the history of Software Bisque, from its introduction of TheSky planetarium software in the 1980s to its evolution of state-of-the-art robotic telescope mounts.
Thanks to NASA's New Horizons spacecraft, we're about to see Pluto up close for the first time. Here are candid snapshots of the scientists and engineers who'll make it possible.
So when astrologers talk about tides linking us to the planets, they're babbling pathetic woo.
Experience Herschel’s “Night of Discovery” for yourself! Follow this guide to recreating William Herschel's amazing night covering 73 deep-sky delights.
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.
What's it like to fly on SOFIA — a repurposed Boeing 747 with a huge rectangular hole in its side and a state-of-the-art telescope peering out through it?
Learn how Dennis di Cicco modified a LightBridge Dobsonian reflector to use Tele Vue's new Paracorr coma corrector - and take some spellbinding images!
The WorldWide Telescope (WWT), featured in the April 2015 issue of Sky & Telescope, isn't just another piece of planetarium software. Its incredible breadth and depth of data allow users to explore the universe in an interactive way. Coauthors Curtis Wong (Microsoft Research) and Alyssa Goodman (Harvard University and Harvard-Smithsonian Center for Astrophysics) teamed up…
Spotted a goof in the magazine? Check here for a list of known errata in 2015 issues of Sky & Telescope. If you don't see the error you found, send us an e-mail and alert us.
In our March 2015 issue, we ask noted amateur and professional astronomers to highlight the astronomy apps they use most. These are apps that every astronomer should have in their back pocket, ranging from practical planetarium and weather apps, such as Scope Nights and Sky Safari 4, to science guides, such as Exoplanet and Astronomy…
In the February 2015 issue of Sky & Telescope, author Marcus Woo walks readers through the science of cosmic voids. Here, videos demonstrate a sense of cosmic perspective, taking the reader on flights through the universe both theoretical and observed.
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.
A full season of mutual events for Jupiter's four largest satellites As Jupiter shines brightly down from the sky during its 2014–2015 apparition, quite often Jupiter's four big Galilean moons will occult and cast their shadows on each other. A "mutual events season" like this happens about every 6 years, when Earth and Sun cross…
Our July 2014 cover story was the apparent discovery of gravitational waves from the instant of inflation when the Big Bang took shape. Just as the article was printed, a serious challenge to the discovery appeared: the researchers had underestimated the amount of interstellar dust that could be contaminating their data. Here are more links…
Watch in-depth interviews with some of the top vendors at the 2014 Northeast Astronomy Forum featuring new telescopes, mounts, filters, and more.
Toddlers can gain a great deal from star parties, more than we might think possible. Here are some further resources for engaging youngsters at your next event.
The asteroid occultation of August 19, 2014
In the cover story of the June 2014 issue of Sky & Telescope, a team of scientists uses the Hubble Space Telescope to look back through cosmic time to the dawn of the universe, back to the time when galaxies were just beginning to form. With hundreds of hours of observing time on one of…
Did you know that the great globular cluster Messier 5 contains two bright Cepheid variables? Here's the useful information about them.
As told in the July 2014 Sky & Telescope, on the morning of July 19th an 8.7-magnitude star in Pisces will vanish for up to 4 seconds behind the invisibly faint asteroid 611 Valeria, as seen from a track crossing northern Mexico, Texas, the Deep South including the Atlanta area, and the Carolinas. The occultation…
Announcing the winners of Sky & Telescope's Comet ISON photo contest, sponsored by Celestron.