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Last updateTue, 18 Sep 2018 1pm

Astronomy

28 Nov 2019
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Venus becomes ever more prominent in the evening, while Jupiter, and then Saturn, sink into the southwest twilight glow in December. Mars, slowly brightening, appears in the southeast morning sky, with bright Mercury below it in the first half of the month. Do not miss Venus and Saturn within 5 degrees Dec. 7-14 (see right), with their closest pairing 1.8 degrees apart on Dec. 10; and the spectacular Venus-moon conjunction on Dec. 28. Three planets span 18 degrees in the southwest at dusk in early December. On Dec. 1, find Venus, magnitude -3.9, with Jupiter, magnitude -1.8, just 8 degrees to the lower right, and Saturn, magnitude +0.6, 11 degrees to Venus’ upper left. Venus is now on the far side of its orbit, with its light taking 12 minutes to reach us, compared to the sun’s eight minutes. Light reflected from Jupiter and Saturn takes 51 and 90 minutes,…
31 Oct 2019
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The sky’s highlights in November include Mars and Spica forming a colorful pair before dawn on Nov. 10. Mercury crosses the sun Nov. 11 to join Spica and Mars a week later. Venus and Jupiter form a brilliant pair at dusk Nov. 23-24. The moon passes three bright evening planets Nov. 27-29. Our evening twilight chart for November shows Venus higher each evening at the same stage of twilight, while Jupiter and Saturn, dragged westward along with the starry background, appear lower. The Abrams Planetarium Sky Calendar highlights the resulting spectacular gatherings of Nov. 24, Nov. 28 and Dec. 10 involving these planets. Planets at dusk: Begin looking low in the southwest about a half-hour after sunset to catch the two brightest planets, Venus (magnitude -3.9), and Jupiter (-1.9, only one-sixth as bright). They are 20 degrees apart on Nov. 4; 10 degrees apart on Nov. 14; and within 5…
26 Sep 2019
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As October both begins and ends, the moon will be sweeping through an evening lineup of four planets. On October evenings, bright Jupiter is in the south-southwest to southwest at dusk, with Saturn to its left in the south to south-southwest; both remain outstanding for telescopic viewing, Jupiter with its cloud belts and four bright moons, and Saturn with its rings now tipped 25 degrees from edgewise. These giant planets appear 26 degrees apart on the sky’s dome on Oct. 1, narrowing to 22 degrees apart by Oct. 31. Follow their eastward motions against background stars, until the seasonal westward drift of the constellations drags both slow-moving planets to the southwest horizon before year’s end. Note reddish twinkling Antares, heart of Scorpius, 10 to 14 degrees to the lower right of Jupiter during October. Watch Jupiter pass 2.1 degrees north of a third-magnitude star on Oct. 22. Look early in…

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