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Tuesday, June 18, 2024

Sky Tonight—April 6, Pleiades cluster above crescent moon

Courtesy of EarthSky
A Clear Voice for Science

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Look westward at nightfall to see the Pleiades star cluster above tonight’s smiling lunar crescent. As seen from middle and far northern latitudes, the moon and Pleiades stay out well past dark tonight. For an extra treat, note the soft glow of earthshine on the moon’s dark (nighttime) side with the unaided eye or binoculars.

When can you see earthshine on a crescent moon?

Top tips for using ordinary binoculars for stargazing

You might be able to spot the moon and Pleiades from middle latitudes in the southern hemisphere. It’ll be difficult, however, for the duo sets soon after dark in that part of the world. Look more in your northwest sky and low to the horizon about one hour after sunset.

At mid-northern latitudes, the Pleiades cluster stays out until late evening in early April. That will change in the weeks ahead, because the the Pleiades set about one-half hour earlier with each passing week. Moreover, the sun keeps setting later as spring approaches summer. Each day, the Pleiades cluster sinks closer to the glare of evening twilight.

More on the Pleiades: Famous Seven Sisters

The Zuni of New Mexico (link has audio) called the dipper-shape Pleiades cluster their “Seed Stars.” The Zuni intently watched the Pleiades at springtime, noting when the “Seed Stars” first disappeared into the spring evening dusk. When the “Seed Stars” dropped out of the evening sky, the Zuni knew that the danger of frost had passed and that it was safe to plant their seeds.

How much longer will you see the Pleiades in your sky? Start watching tonight, looking for the Pleiades star cluster above tonight’s waxing crescent moon.

Understanding moon phases

By Bruce McClure


Astronomy Picture of the Day from NASA/JPL

EarthSky: Space

CHANDRA Photo Album

U.S. Naval Observator Astronomical Information center

Universe Today

StarDate Online

Sky and Telescope

National Geographic

Space Com

Simostronomy Blog

Amazing Space

The York County Astronomical Society

Scope City

James S McDonnell Planetarium

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