Could Pluto Regain Its Planethood?
A proposed new definition for what constitutes a "planet" could reinstate the demoted icy world
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Astronomers Snap Supernova’s Baby Pictures
Images of an exploding dying star taken just a few hours after its detonation are revealing new details of stellar death
North Korea's Missile Threats to the U.S. May Not Be Empty for Long
North Korea has always talked the talk, and now it seems to be walking the walk as never before
Astronomers Spy Dusty "Traffic Jam" in Young Star System
The newfound structures in disks of dust and gas around newborn stars could aid planet formation
New Study Pins Down Jupiter's Birthday
The gas giant planet took shape within 4 million years of our solar system's formation
Midsize Black Hole Found Hiding in Globular Cluster
The discovery brings the number of known "intermediate-mass" black holes to about a dozen
World’s First Atomic Blast Tests Theories of Moon’s Formation
Radioactive glass from the Trinity nuclear test site resembles ancient moon rocks
What Warmed Ancient Mars?
New data from NASA's Curiosity rover suggest a surprising dearth of greenhouse gases in the Red Planet's distant past
Black Hole Binges on Record-Setting Stellar Meal
A trio of x-ray observatories has spied a supermassive black hole feasting on a giant star for more than a decade
![Dashboard Camera Captures Bright Green Fireball Streaking Over U.S. Midwest [Video]](https://static.scientificamerican.com/sciam/cache/file/92DFB964-BF27-4A4B-91B472D65599C712_agenda.jpg?w=275&h=154&fit=crop)
Dashboard Camera Captures Bright Green Fireball Streaking Over U.S. Midwest [Video]
The 300-kilogram meteor created a sonic boom, and may have dropped fragments into Lake Michigan
NASA’s Next Rover Faces Steep Challenges on Path to Mars
A new report details problems that could push the Mars 2020 rover over-budget and behind schedule
Are Wormholes a Dead End for Faster-Than-Light Travel?
Portals connecting far-distant regions of the universe may not be just the stuff of science fiction, but they probably couldn't be used for interstellar travel
IceCube Closes in on Mysterious Nature of Neutrinos
The Antarctica-based observatory has found hints of strange patterns in the ghostly particles' masses
Traces of Oxygen on the Moon Come from Earth's Plants
Earth's biosphere has bathed the lunar surface for billions of years
NASA’s Fermi Telescope Spots Record-Breaking Blazars
Powered by supermassive black holes, the intense light from these extreme galaxies began its journey to us when the universe was but a tenth of its present age
Private Space Station Coming Soon? Company Aiming for 2020 Launch
Work is underway to establish the world's first private, international commercial space station
50th Anniversary of Apollo 1 Fire: What NASA Learned from the Tragic Accident
January 27 marks the 50th anniversary of the first major, deadly disaster for the U.S. space program
Cosmic Lenses Show Universe Expanding Surprisingly Fast
Light-bending warps in spacetime reveal a speedy cosmic expansion
Pluto's Moon Charon Had Its Own, Icy Plate Tectonics
Surface cracks look like seafloor-spreading zones or rift valleys on Earth
The Story of NASA’s Real “Hidden Figures”
African-American women working behind the scenes as “human computers” were vital to the Space Race
