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.

Web extra: Gravity’s star-stripping 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.

Web extra: Uncovering the Fox’s story

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.

Web extra: For serious observers only

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.

Web extra: U.S. Naval Observatory

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
Beautiful universe
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
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