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Nebula · in Orion

Orion Nebula

A cloud of gas and dust about 1,300 light-years away where new stars are forming - the brightest nebula in the sky. Also catalogued as M42.

When to look: Winter evenings, roughly November to March.

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 fuzzy 'star' in Orion's sword, below the three belt stars. Visible from dark sites and sometimes from the suburbs.
Small telescope (60-90 mm)
A grey, misty glow with the four stars of the Trapezium at its heart.
Medium telescope (114-150 mm)
Curving wings of nebulosity spreading from the Trapezium, and darker lanes within the glow.
Large telescope (200 mm and up)
Much more structure. To the eye it stays grey or faintly greenish: the reds and pinks of photographs are not seen visually.

City or dark sky

From a city

One of the few nebulae that shows from a city, though much of its extent is lost.

From a dark site

A dark site shows far more of its wings and fainter structure.

Observing tip: Use low magnification. Look slightly to one side of the nebula (averted vision) to see its fainter parts.

Orion Nebula through our telescopes

Photographs are brighter and sharper than the view at the eyepiece; each is labelled with how it was taken.

The Orion Nebula (M42) in a processed colour photograph: glowing pink and red gas around a bright core of young stars.
Through the RVision GT · Edited
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