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.
The moment the Sun reaches its southernmost point in the sky marks the December solstice, the official beginning of winter in the Northern Hemisphere (where it is called the winter solstice) and a time of great celebration in many northern cultures.
If it’s clear Wednesday night and Thursday before dawn, keep a lookout high overhead for the "shooting stars" of the Geminid meteor shower.
The prevailing view of the universe has just passed a rigorous new test, but the mysteries of dark matter and dark energy remain frustratingly unsolved.