Jupiter up close and personal
The New Horizons spacecraft viewed giant storms, erupting volcanoes, ring clumps, and ionized particles as it flew past Jupiter on its way to Pluto.
The ugly side of gravity
Earth’s ocean tides, Jupiter’s comet-splitting power, and galaxies stripping stars away from neighbors tell the story of gravity’s destructive force.
Watch as a massive galaxy steals stars away from a diminutive satellite.
The Americas’ oldest observatory
An archaeological dig became an astronomical investigation when a 4,000-year-old temple in Peru revealed its secrets.
The 4,200-year-old temple unearthed at Buena Vista, Peru, is aligned with the dark-cloud figure of the Fox, but how old is the constellation?
Take the Sharpless Catalog challenge
This list of glowing hydrogen clouds provides rewarding targets for eye and camera alike.
Plan your observing using the catalog of American astronomer Stewart Sharpless.
Lighthouse of the skies
The U.S. Naval Observatory has blazed a path between sea and sky since its birth in the mid-19th century.
USNO’s “to do” list includes bigger and better star catalogs and more-accurate atomic clocks.
Spreading astronomy around the world
The 118-year-old Astronomical Society of the Pacific is on a mission.
Astronomy tests Celestron’s CPC 1100 GPS
This 11-inch powerhouse puts thousands of celestial targets within your view.
This month in Astronomy
Bob Berman’s strange universe
Glenn Chaple’s observing basics
Phil Harrington’s binocular universe
Web extra: Time for tea
Stephen James O’Meara’s secret sky
The sky this month