SUNSET: 
Astronomy Day + International Observe the Moon Night = Weekend of Fun
Look to your local astronomy club for a day and night of observing activities for Fall Astronomy Day and International Observe the Moon Night.
Does the Nearest Quasar Host a Black Hole Binary?
Astronomers are investigating a new technique for finding close pairs of supermassive black holes, and they might have found one in the nearest quasar.
New Evidence for Black Hole Binary
Astronomers have confirmed that the quasar PG 1302-102 is probably a binary supermassive black hole, its members less than a tenth of a light-year apart.
Views of Sunday’s Solar Eclipse from Space
Some of the most stunning views of Sunday's partial solar eclipse didn't come from Earth.
Resonant Waves Might Heat Corona
Astronomers have detected waves working together in the solar atmosphere, potentially heating the gas through turbulence.
Call for Solar Observers (Sept. 19–27)
Does your version of stargazing involve pointing your telescope at the Sun? With the right equipment, you can aid a project that aims to catch a solar flare in the act of erupting. The observing campaign is coming up soon: September 19 - 27, 2015.
Best-yet New Horizons Views of Pluto
NASA's New Horizons spacecraft has returned high-resolution, richly detailed images of Pluto and its moon Charon, revealing surfaces that are confounding in their complexity.
September 13th's Partial Solar Eclipse
Residents of southern Africa get to watch the Moon cover part of the Sun not long after (or during) sunrise on Sunday, September 13th.
Twin Stars Simplify Distance Measurements
A new technique that relies on identifying stellar twins yields a novel way to measure the distances to stars.
New View of Ceres’ Amazing Spots
The latest image from NASA's Dawn spacecraft reveals structure in the bright spots on the asteroid 1 Ceres.
ISS Photos Yield "Cities at Night" World Map
Researchers on the ground have combed through a trove of images taken by orbiting astronauts to reveal unprecedented details about light pollution streaming from Earth's major cities.
Kuiper Belt Target Picked for New Horizons
A small body known as 2014 MU69, found by the Hubble Space Telescope barely a year ago, will be the next destination for NASA's New Horizons spacecraft.
Amateurs Help Discover Rare Eclipsing Binary
A collaboration of amateur and professional astronomers has uncovered a rare variety of eclipsing binary star - and a supernova in the making.
Tour September's Sky: A Lunar Eclipse!
This month's stargazing features pretty planetary treats in the eastern sky before dawn — and the last total lunar eclipse visible until 2018.
Insights from S&T's Family of Planet Globes
Pictures are great, but there's nothing like holding another world in your hands to appreciate its unique characteristics. True confession: even from childhood, I have always been a map junkie. Sure, I use GPS these days, but my car is still stuffed with road maps. The National Geographic Atlas of…
Planning for America's Great American Eclipse in August 2017
Dozens of solar specialists are coordinating outreach activities for a coast-to-coast total solar eclipse that's only two years away.
Dwarf Bull’s-eye Galaxy Discovered
Astronomers have discovered that one galaxy of a nearby double-galaxy system has a giant, star-studded ring.
Scientists Find Ancient Lake on Mars
Scientists have discovered an ancient lakebed on Mars.
Is Dark Energy a Chameleon?
A lab experiment has all but nixed one of the theories of dark energy, a mysterious force pushing the universe apart.
Robotic Flyers: Future of Space Exploration?
Quadcopters, the four-propellered drones that have become a familiar sight in terrestrial skies, may be the next big thing in space exploration.
