How much aperture does it take?
Seeing Venus through a telescope
A brilliant white crescent, like a tiny moon. No surface detail — the cloud deck is featureless in visible light — but the phase is unmistakable in almost anything.
Through three telescopes, under a suburban sky
Each circle is the true field of a 10 mm eyepiece. Same target, same sky; only the aperture changes.
Detailed
Detailed
Detailed
The aperture it takes, by sky
Venus does not care about light pollution: it is bright, and the air, not the sky glow, sets the limit.
| Level | Milky Way blazing | Milky Way, barely | No Milky Way |
|---|---|---|---|
| Detectable | 10 mm | 10 mm | 10 mm |
| Recognisable | 40 mm | 40 mm | 40 mm |
| Detailed | 60 mm | 60 mm | 60 mm |
When to look
Visible for months at a time as a morning or evening star.