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Star cluster · in Taurus

Pleiades

A cluster of young, hot blue stars about 440 light-years away, also known as the Seven Sisters. Also catalogued as M45.

When to look: Late autumn and winter evenings.

What it looks like

Described as seen by eye at the eyepiece, on a clear night. Photographs collect light for minutes or hours and show far more colour and detail.

With the naked eye
A tight group of six or seven stars, easily seen even from many cities.
Small telescope (60-90 mm)
Dozens of stars at low magnification. Binoculars or a wide-field telescope show the whole cluster best.
Medium telescope (114-150 mm)
Many more stars; at higher magnification the cluster overflows the field of view.
Large telescope (200 mm and up)
More faint stars, though a wide field matters more than aperture here. The faint blue nebulosity seen in photographs is very hard to see by eye.

City or dark sky

From a city

Bright enough for city skies.

From a dark site

A darker sky adds many fainter members.

Observing tip: Use the lowest magnification you have, or binoculars.

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