61–80 of 1,084 results
binary supermassive black hole

Stellar Science

60-Second Astro News: Merging Black Holes, Distant Super-Supernova, and Arecibo's Fate

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.

Diana Hannikainen

About Sky & Telescope

Diana Hannikainen

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…

K2-138 planetary system art

Milky Way

60-Second Astro News: Exoplanets, Comet 41P & Milky Way Clouds

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.

Burnt orange beauty

Press Releases

West Coast Favored for Total Lunar Eclipse on January 31st

The total lunar eclipse on January 31st — the first of two in 2018 — will be a predawn spectacle that favors western North America.

Blue Moon calendar

Press Releases

Total Lunar Eclipse "Trifecta" on January 31st

Wednesday's total lunar eclipse occurs on January's second full Moon — and also when the Moon is nearly its closest to Earth.

New Product Showcase

Oceanside Photo and Telescope's Narrowband Luminance Filter

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.

New Product Showcase

Field Tested Systems' Spectra Table

RSpec now offers a unique poster of the Periodic Table of the Elements. The Periodic Table of Spectra poster ($6.95) measures 36 by 24 inches and displays the emission spectra of every known element seen in the universe.

New Product Showcase

QHYCCD's Full-Frame CMOS

QHYCCD rolls out a new model in its COLDMOS camera series, the QHY128C ($3,499) 14-bit, full-frame CMOS camera for deep-sky astrophotography.

How to spot Quadrantid meteors

Celestial News & Events

Poor Year for the Quadrantid Meteor Shower

The Quadrantid meteor shower is usually one of the year's best. But this year's event will be spoiled by strong light from an intruding Moon.

Low Sun, Long Shadows and Icy Atmospherics

Astronomy Questions & Answers

What is the Winter Solstice?

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.

Meteor trail over Chelyabinsk

Solar System

AGU 2017: News from the Solar System

­­­Here's a quick look at results announced at the 2017 American Geophysical Union meeting in New Orleans: exploding meteoroids, Saturn's ring-atmosphere connection, and more bright spots on Ceres.

Geminids in 2017 at 2am

Press Releases

Impressive Geminid Meteors to Peak on December 13–14

If it’s clear Wednesday night and Thursday before dawn, keep a lookout high overhead for the "shooting stars" of the Geminid meteor shower.

New Product Showcase

Rozendaal Astrolabes' Wood Astrolabes

Rozendaal Astrolabes now offers a series of wood astrolabes (starting at $80). These fully functional, attractively handcrafted instruments are 15 centimeters (6 inches) in diameter.

New Product Showcase

SBIG's Aluma Series Deep-Sky Cameras

SBIG announces the Aluma Series of cooled imaging cameras (starting at $3,699). They have been engineered with new sensors on the central axis of the unit.

New Product Showcase

Pocket Guide from Waterford Press

Waterford Press produces The Night Sky ($7.95), a laminated, folding pocket sky guide featuring seasonal glow-in-the-dark star charts.

New Product Showcase

PlaneWave Instruments' Robotic Mount

PlaneWave Instruments introduces the L-500 Direct Drive Mount ($18,000). This single-arm fork mount can operate in equatorial or alt-azimuth configurations, and is rated to support up to 200 pounds of equipment

New Product Showcase

Astrograph from Knaeble Optical Systems

German manufacturer Knaeble Optical Systems announces the RCM 360 FC/Ti astrograph (starting at $25,000).

New Product Showcase

Beginner Astronomy Guide

Looking for light reading to help introduce a beginner to astronomy? 101 Amazing Sights of the Night Sky by George Moromisato might be your answer.

Science-based Q&A

The Kavli Foundation Q&A: A New Map of Dark Matter?

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.