Early on July 31st, the planet Mars will be closer to Earth than at any time in the past 15 years. It's bright and unmistakable in the southwestern sky after evening twilight.
The night sky's two brightest object — the Moon and Venus — will appear dramatically close together after sunset on Sunday, July 15th.
Willmann-Bell releases the 5th volume of Annals of the Deep Sky: A Survey of Galactic and Extragalactic Objects by Jeff Kanipe and Dennis Webb ($24.95). The series continues to be the most up-to-date and comprehensive observing guide available in the 21st century.
A short take on astronomy news finds a cosmic butterfly testing theories of galactic evolution, a new idea for the formation of Mars's moons, and the discovery of a stellar thief that survived a supernova explosion.
The just-launched Transiting Exoplanet Survey Satellite (TESS) could soon provide the breakthrough identification of dozens of potentially habitable exoplanets right in our cosmic backyard
The editors of Sky & Telescope report experiences from last weekend's Northeast Astronomy Forum (NEAF) in Suffern, New York — one of the busiest years ever for the world's biggest astronomy trade show.
Hubble reveals a relic galaxy, Dawn sees the surface of asteroid Ceres changing, and scientists probe an auroral phenomenon named "Steve."
A newfound star in a nearby galaxy appears to have cheated death by blowing up at least twice as a supernova. It could be a throwback to the first stars that ever formed.
Supermassive black holes en route to merger have strange dynamics in their gas disks. Astronomers have spotted the most distant spectroscopically confirmed supernova. And NSF decides the fate of the Arecibo Observatory.
Observing Editor Diana Hannikainen is thrilled to join the staff of Sky & Telescope, where she is reconnecting with the night sky that so mesmerized her in her youth. Following an undergraduate degree at the University of Edinburgh in Scotland, Diana decided to explore her Finnish roots, and headed over…
Citizen scientists have discovered a system of five sub-Neptune planets, NASA scientists follow the spin of Comet 41P, and speedy clouds of gas shed light on the Millky Way's history.
The total lunar eclipse on January 31st — the first of two in 2018 — will be a predawn spectacle that favors western North America.
The OPT Triad Tri-band narrowband filter is designed to pass wavelengths centered at 493 and 656.3 nanometers and is available in 1¼-inch and 2-inch formatted cells for $375 and $775 USD, respectively.