California Science & Technology News

Watch the Moon Hug Jupiter Tonight

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If your sky is clear tonight (Feb. 10), be sure to check out the southeast sky about an hour or so after sundown for an eye-catching site: Jupiter and the moon shining together.

Weather permitting, stargazers can find the celestial meet-up on about halfway up in the southeastern evening sky. You'll immediately see the moon, which will be at its waxing gibbous phase, en route to becoming a full moon on Valentine's Day (Friday, Feb. 14).

This evening, observers may notice a very bright, silvery "star" shining with a steady glow to the right or lower right of the moon. That's not a star, however, but in reality, the biggest planet in our solar system: Jupiter. Both moon and planet will keep each other company as they move across the night sky through the course of the night.

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Casual observers looking skyward will almost certainly wonder what that bright object near the moon happens to be, and I would encourage all of my fellow broadcast meteorologists to let their listeners and viewers in on what they're seeing in the night sky.

Jupiter is ideally placed for evening viewing, shining high and free where trees and other obstructions reach in vain to hide it, and where even the ill-effects of atmospheric seeing are at their least. Jupiter currently shines between the legs of Gemini. It reaches its highest point in the sky transiting the meridian, as the astronomers would say around 9:30 p.m. your local time. It sets during the predawn hours, soon after 4 a.m. your local time.

or all four of its bright moons at any given time.

But the planet's disk itself also draws a lot of attention. In large telescopes, observers can view its cloud belts, sometimes one or more can look strongly disturbed, full of knots and sprouting festoons or on the other side of the coin, perhaps looking like pale belts crossing the planet. And recent reports suggest that the famous Great Red Spot now appears darker than it has been for several years. As always, seeing much detail on Jupiter requires a good quality telescope, good atmospheric seeing, and patience behind the eyepiece.

Lastly, if clouds hide your view of the moon with Jupiter, don't fret. They'll be together again on March 9.

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