Sky & Telescope Magazine

A Thrilling Trio of Variable Stars

These three important, prototypical variable stars will hold your attention for nights on end: Delta Cephei, Mira, and Algol.

Sky & Telescope Magazine

Diamond of Three Rings

A total solar eclipse offers the most spectacular of jewels, the diamond ring, as the Moon blocks all but a small part of the Sun's brilliance.

Green Ripples

Daylight Phenomena

Catch the Green Flash!

It sounds like a comic-book superhero, but this brief spectacle marks the end of daylight with a burst of color.

Celestial News & Events

The Moon Meets Jupiter and Venus

The crescent Moon joins Jupiter and Venus in the east at dawn to create a beautiful scene on November 9th and 10th.

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