Jupiter, Ganymede, Europa and double shadows, March 25, 2019

Celestial News & Events

The 12-Year Cycle of Jupiter Oppositions

Jupiter is at opposition on August 19th. If we take the long view — 12 years long — we can watch Jupiter's oppositions as it passes through the zodiac constellations.

Winter Hexagon (February)

Night Sky Sights

Watch the Moon Journey Across the Winter Hexagon

About once a month this winter, we can watch the Moon take a four-day journey across a field of stars termed the "Winter Hexagon."

Sirius and M41

Celestial Objects to Observe

Tour 15 of the Brightest Stars on New Year's Eve (VIDEO)

Tour 15 of the sky's brightest stars all in one night on this New Year's Eve! This interactive Worldwide Telescope video will show you the way.

Saturn, Jupiter, and the waxing gibbous Moon

Night Sky Sights

See Beyond the Celestial Sphere: Follow These Lines into Space

For a little perspective, observe along a line that takes you to the Moon, past Jupiter and Saturn, the Kuiper Belt, and onward into our galaxy.

All-season Triangle

Night Sky Sights

This May, Find the Star Pattern That Spans All Seasons

Widen your view to see the All-Season Triangle asterism, whose stars span the year.

Labeled Big Dipper

Learning About the Sky

The Big Dipper: Hop to Spring's Sky Sights

The Big Dipper is one of the most familiar sights in the Northern Hemisphere’s night skies. You can use its stars to locate other fun targets.

Moon phases in perspective

Celestial Objects to Observe

August Will Have Two New Moons! What’s the Big Deal?

First there were "blue Moons;" now there are "black Moons." What do these terms mean . . . and do they matter?

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