The alignment of a new moon with the return of a periodic comet offers British skywatchers one of the clearest windows this summer to engage directly with the ordered motions of the solar system.
On 14 July 2026 the Moon reaches its new phase at 10:43 local time in London. At this point the lunar disk lies between Earth and the Sun, rendering it invisible from our vantage and producing the darkest night skies of the entire lunar month.
That absence of moonlight creates favourable conditions for observing faint objects. Comet 10P/Tempel is currently making its way into the inner solar system and remains visible with binoculars or a small telescope in the constellation Capricornus. The period surrounding the new moon therefore supplies an especially good opportunity to study both the comet and the delicate band of the Milky Way.
The comet itself is predicted to reach peak brightness around early August near its closest approach to the Sun on 2 August and to Earth the following day. From the United Kingdom it appears low in the southern sky during July, which demands a clear southern horizon and a site removed from light pollution for the best results.
NASA skywatching guidance for July 2026 identifies the new moon on 14 July as offering the best dark-sky window for viewing Comet 10P/Tempel 2 and the Milky Way.
Observers should note that the full moon follows later in the month, on 29 July at 15:36 in the United Kingdom. Before then, the moonless nights around the 14th represent the month’s most practical chance for individual viewers equipped with modest instruments to record the comet’s gradual brightening and trace the structure of our home galaxy.
