SUNSET: 
Milky Way May Be Made with Swapped Gas
High-powered simulations suggest that half of the material in the Milky Way could come from other galaxies.
Breakthrough Starshot Takes to Space
Six Sprites, "the world's smallest spacecraft" have entered low-Earth orbit, a small milestone for Breakthrough Starshot's plan for interstellar voyage.
ALMA Captures Star Formation in Action
New ALMA observations reveal a forming star as it launches a wind from the edge of the disk that feeds it.
Sky Surprises: New Comet ASASSN1, Nova in Scutum, and Supernova in Pisces!
Between the discovery of the new comet ASASSN1 and two stellar explosions, there's a lot happening in the sky this week. Take your telescope out and see what all the excitement's about.
Source of Mars Trojans Might Be Mars Itself
A new study proposes a possible source for the mysterious Mars Trojan asteroids: the Red Planet itself.
Still Making Eclipse Travel Plans? Camping Might be the Answer
Think the total solar eclipse is "sold out"? Think again — and grab your camping gear. Private campsites and RV parks within the long path of totality are still available for those willing to travel.
Is Our Sun Slowing Down in Its Middle Age?
The Sun, now halfway through its life, might be slowing its magnetic activity, which could lead to permanent changes in the sunspots and auroras we see.
Discovery of a Free-Floating Double Planet?
An object previously identified as a free-floating, large Jupiter analog turns out to be two objects — each with the mass of a few Jupiters. This system is the lowest-mass binary we’ve ever discovered.
Goodbye, LISA Pathfinder
The European Space Agency switched off its groundbreaking LISA Pathfinder mission this week.
New Satellite "Mayak" Might Light Up the Sky
Russia's first crowd-funded satellite, named Mayak (Russian for "beacon of light"), promises to be the “brightest object in the night sky next to the Moon.”
100 Billion Brown Dwarfs in the Milky Way?
A new study of a nearby cluster of newly formed stars reveals that brown dwarfs may rival stars in the Milky Way in number, with one brown dwarf for every two bona fide stars.
Artificial Neural Network Finds Speeding Stars
Astronomers found six runaway stars when they applied a neural network to data from the European Space Agency’s Gaia mission, which is set to map a billion stars across the Milky Way and beyond.
Amateur Observers Find an Asteroid's Moon
A team of amateurs observers, some armed with just 3-inch telescopes, have found that the main-belt asteroid 113 Amalthea probably has a small companion.
By Jove! Juno Images Jupiter's Great Red Spot
NASA's Juno Spacecraft delivers stunning closeup views of Jupiter's famous swirling Great Red Spot storm.
Top 10 Places to View the Total Solar Eclipse
The celestial event of this young century — the great American total solar eclipse of 2017 — is now just weeks away. The biggest remaining question is, where will you be when the Moon’s shadow arrives?
Incredible Resolution: Reconstructed Galaxy Pushes Hubble’s Limits
Thanks to the effects of gravitational lensing, a team of astronomers was able to reconstruct a distant galaxy and study its unexpectedly clumpy star forming regions.
Let's Find Pluto!
At opposition this week and as bright as it will be for the next 190 years, it's time to find your way to Pluto, a frigid enigma at the edge of night.
Exploring the Minispiral at the Milky Way’s Center
The region around Sgr A*, the 4-million-solar-mass black hole at the heart of our galaxy, is a complex and dynamic place. New Atacama Large Millimeter/submillimeter Array (ALMA) observations of the Milky Way’s center now reveal more about this harsh, inhospitable environment.
Third Try at a National Space Council
What is the National Space Council and what will it do? A look back through history provides some possible answers.
How to Build on the Solar Eclipse Experience
Eclipse-related outreach activities will abound this August, but how do we best capitalize on this rare celestial event after it happens? Astronomers Without Borders has developed a Sun-focused curriculum and is looking for volunteers to help teachers implement it.
