1141–1160 of 1,256 results
Porcelain sun dial

Stargazing Basics

Time In the Sky and the Amateur Astronomer

While civil time is based on official edit, the celestial clockwork follows its own rhythms.

plenty of elbow room

Resources and Education

An Observatory with Sails

After working at Sky & Telescope for nearly a decade I got the chance to build the observatory I'd always wanted.

dew-it-yourself heater

Equipment: Guides & Recommendations

DIY Dew Heater

With just a little electrical know-how you can make an antidew heater that suits your scope.

Aligning an equatorial mount on Polaris

Resources and Education

Accurate Polar Alignment with Your Telescope

Long-exposure astrophotography requires an accurately aligned equatorial mount.

Sun through hydrogen-alpha filter

Observing

Observing the Sun Safely: Sunspots, Faculae, and Flares

The surface of the Sun is a dynamic, living place that can change unpredictably from day to day.

Celestial News & Events

Watch the Re-Entry of Stardust

Late Saturday night, January 14-15, skywatchers in much of the American West can watch for a dazzling artificial "meteor."

Astronomy & Observing News

Mars News, True and False

It's unkillable! A two-year old e-mail chain letter is misleading people into expecting Mars to go nuts in August.

Astronomy & Observing News

New Amateur Asteroid Awards

Congress has established $2,000 annual prizes for U.S. amateurs who discover near-Earth asteroids or aid asteroid research.

Black Holes

Binary Quasar Is No Illusion

A close pair of quasars in Pisces turns out just that, not the record-breaking gravitational lens that astronomers had hoped.

Press Releases

Comet Schwassmann- Wachmann 3 at Its Best

This periodic comet, due to fly close by Earth in May, is breaking into even more pieces. The brightest one may reach 4th magnitude.

Celestial News & Events

Comet To Cross Ring Nebula!

On Sunday night for North America, the brightest piece of Comet Schwassmann-Wachmann 3 goes right over the Ring Nebula in Lyra.

Astronomy & Observing News

Why Galaxies Tilt Just So

Spiral galaxies like the Milky Way got oriented by forces shaping the entire cosmos.

Press Releases

The March 29th Solar Eclipse

Europe, Africa, and parts of Asia are in line to get Moon-shadowed next Wednesday.

Astronomy & Observing News

First Picture from Mars Reconnaisance Orbiter

Having entered Martian orbit, NASA's latest explorer has tried out its record-breaking camera.

Deep Sky

RS Ophiuchi Finally Blows its Stack

This famous recurrent nova has just erupted for the first time in 21 years, reaching magnitude 4.8 on February 13th.

Astronomy & Observing News

Solar Cycle Solved?

Researchers tracking material deep inside the Sun think that they have solved the mystery of the 11-year sunspot cycle — and they they can predict the next cycles' strength.

Celestial News & Events

A Surprise Comet in the Dawn

Comet Pojmanski has brightened more than expected as it enters the dawn sky for Northern Hemisphere observers. Can you spot it with binoculars?

Celestial News & Events

Near-Earth Asteroid Flyby, March 6–10

Catch the 12th- to 13th-magnitude asteroid 2000 PN9 (23187) crossing the northern sky.

Celestial News & Events

Moon Occults Spica February 17th

The waning gibbous Moon will cover 1st-magnitude Spica for parts of eastern North America on Friday night, February 17, 2006.

Celestial News & Events

Mars Receding in the Evening Sky

Blazing in the eastern sky these evenings, Mars is putting on a rare appearance not to miss.

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