Still active today, the Association of Lunar & Planetary Observers and its journal got their start on March 1, 1947.
A recent study found micrometeorites in piles of dirt collected from urban European rooftops.
Thanks to some timely NSF support, the American Astronomical Society is offering dozens of small grants to U.S. groups that offer outreach programs tied to the 2017 s
Do you think 2016 has seemed unusually long? An international agency has decided to make it even longer.
Astronomer Vera Rubin, known for her revolutionary work confirming the existence of dark matter, died on December 25th. She was 88.
From humble beginnings in 2008, a simple idea — equipping libraries with loaner telescopes — has caught on across the United States.
Bringing order to chaos, the International Astronomical Union has approved standardized spellings and designations for the traditional names of 212 bright stars.
Much has been said and written about the Moon's proximity to Earth today. Is that a good thing or a bad thing?
A new e-digest from the International Astronomical Union’s Minor Planet Center gives the public a head’s up on passing asteroids.
An historical study from former U.S. military officials found that a solar flare was nearly responsible for military conflict with the Soviet Union in May 1967.
Light pollution is pervasive, and its impact on people is larger than you might think.
Join the world’s largest celebration of astronomy — in person or via online webcasts of events — throughout April.
Modern security threats have brought back an old method — celestial navigation — to help U.S. Navy sailors navigate the high seas.
What began as a student's simple idea a decade ago has grown into a worldwide celebration of the night sky and easy ways to reduce light pollution.
A burst pipe flooded Harvard College’s Observatory Hill, submerging thousands of historic photographic plates underwater. Recovery is now under way.
It's high time that we amateur astronomers got serious about protecting the night sky from light pollution.
A multi-year investigation revealed errors in our understanding of the Sun.
The U.S. Postal Service has unveiled new stamps, to be issued later this year, that feature 10 solar-system objects — including Pluto.
Following a wildly popular contest, the International Astronomical Union has named 14 stars and 31 planets that orbit them.
A new website shows how light pollution spreads around the globe — using data gathered by its users.
For the second time during his tenure, President Obama invited amateur astronomers to join him on the South Lawn for an evening of stargazing.
Geoffrey Marcy, a top figure in exoplanet discovery, sexually pressured and harassed students and researchers for at least a decade.
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.
A $100 million donation will radically speed up the search for artificial signals from the nearest million stars — and from trillions of much farther stars in the 100 nearest galaxies.
Clashes over building the premier telescope in the Northern Hemisphere and preserving Mauna Kea as a sacred site have intensified.