Scientists have finally confirmed a decades-old theory on what causes the faint flickering seen in the Northern Lights toward dawn.
AAS Chambliss Award winner Donald Bruns explains how he confirmed Einstein's predictions during the 2017 total solar eclipse.
The recent discovery of a new type of tiny, star-forming galaxy is the latest in a zoo of detections shedding light on our early universe. What can we learn from the unique “little blue dots” found in archival Hubble data?
Newly-discovered asteroid 2018 CB will be passing only about 44,000 miles away Friday and visible in modest telescopes.
SpaceX made history on February 6th when the company successfully launched its long-awaited Falcon Heavy rocket from Kennedy Space Center in Florida.
A new suite of cosmological simulations sheds light on the interconnected cosmic processes that shape the universe.
Two new studies of the seven planets orbiting TRAPPIST-1 shed light on how these worlds formed and what they look like now.
Dark matter particles may travel more slowly than we thought, hindering their detection. Dust storms may aid atmospheric loss on Mars. And a new mission is investigating magnetic fields at an unprecedented scale.
New research shows that the supersonic motion of the Moon's shadow across the continental U.S. in August 2017 created bow waves in Earth's atmosphere.
The 2018 total lunar eclipse was witnessed by many in western North America and right across the Pacific.
Most of the dwarf galaxies around Centaurus A appear to be orbiting the giant galaxy along a single plane — a result not predicted by current cosmological models.
Almost everyone considered Japan's Venus-bound orbiter a lost cause, but the spacecraft survived, reached its objective, and is wowing scientists with results.
February's astronomy podcast offers you a trio of bright planets to spot before dawn and a plethora of bright stars to check out each evening.
The launch of the Humanity Star has some fuming, others smiling, at the prospect of seeing a bright, new satellite. What do you think?
60 year ago today, a small satellite ushered in the U.S. space program in a big way.
If you're not in the right place in the right time, you can still view Wednesday morning's total lunar eclipse online via several live streams. We list several options here.
Get ready for a celestial event — a total lunar eclipse during the month's second full Moon and near lunar perigee — that hasn't happened in 35 years!
Scientists now understand where large planets stop and small brown dwarfs begin — a discovery that redefines the word “planet.”
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.
Amateur astronomer Donald Bruns has received the Chambliss Amateur Achievement Award from the American Astronomical Society for his work in repeating and improving upon an iconic experiment during the August 2017 total solar eclipse.
Join Sky & Telescope's live webinar on Monday, January 29th, to find out which 2018 events present the best nightscape opportunities with world-renowned photographer Babak Tafreshi.
An unusual dawn total lunar eclipse presents special challenges and great photo opportunities. Here's what you need to know to make the most of it.
Here's all you need to know to help us measure the size of Earth's shadow on Jan. 31, 2018.
Thick sheets of water ice, some barely buried beneath the surface and likely more than 100 meters thick, have been spotted on several Martian cliff faces.
The Kilopower fission reactor will offer a more efficient and more powerful portable power source for solar system exploration.