The Best Time to Look at the Moon Through a Telescope
Most beginners wait for Full Moon. It's the most obvious, but it's also the least interesting view through a telescope.
Why Full Moon looks flat
At Full Moon the Sun lights the surface head-on, so there are almost no shadows. Without shadows, craters and mountains lose their depth. The disk is also extremely bright, which dazzles your eye.
The best phases
- Crescent (3–5 days old): long shadows on the eastern limb; early evening viewing.
- First Quarter: the classic "half Moon". The terminator runs down the middle, showing craters like Copernicus nearby and the Apennine mountains.
- Last Quarter: just as good, but rises after midnight.
What is the terminator?
It's the line between lunar day and night. Along it, the Sun is low on the lunar horizon and even small hills cast long shadows. Slowly scan along this line at 80–150x.
Use a Moon filter
A neutral-density Moon filter screws into your eyepiece and cuts glare, especially in larger telescopes. It's an inexpensive accessory that makes a clear difference.
The planner's Moon panel shows tonight's phase, illumination and rise and set times, plus a tip for the current phase.