Mercury reaches greatest western elongation, visible in morning sky

The morning sky will provide one of the year’s most favorable chances to observe Mercury, the solar system’s innermost planet, as it reaches its greatest western elongation on Sunday. At this point in its tight orbit, Mercury appears at the maximum angular distance from the Sun in the pre‑dawn horizon, allowing it to be seen against the growing light of day rather than being lost in sunrise glare. The planet will continue to brighten over the following mornings, improving its contrast with the dawn and making it increasingly visible to observers who can catch the early light.

Astronomers advise an early start and an unobstructed view toward the east‑north‑east to spot the small, bright disc. A sky chart for London shows the planet positioned in that direction at 04:30 BST on Tuesday, illustrating the optimal viewing window. Enthusiasts across the United Kingdom and comparable latitudes are encouraged to look for Mercury during these mornings, as the conditions this week represent one of the best opportunities of the year to glimpse the elusive world.