Best view
Low twilight sky during favorable elongations.
Planet guide
Mercury Tonight: How to Find It Near the Horizon
Mercury is the hardest bright planet to catch because it never appears far from the Sun. The best chances are short windows low in twilight.
Quick facts
Use these cues first, then confirm the pattern in the AR viewer.
Visual cue
Small steady point close to the horizon.
AR note
Location and time are critical because Mercury moves quickly.
Why Mercury is difficult
Mercury orbits close to the Sun, so it is usually hidden in glare or very low after sunset or before sunrise.
When to look
Look during favorable evening or morning elongations. A clear, flat horizon matters more for Mercury than for most other planets.
Use AR safely
Use the AR viewer only when the Sun is safely below the horizon or blocked. Never search near the Sun through a camera or optical device.
How NightSky AR places Mercury
The AR viewer calculates Mercury from the current date, browser time, and observer coordinates, then converts that sky position into altitude and azimuth for your local horizon.
That local conversion is why a planet guide cannot use one universal direction for every visitor. A planet may be high in one place, low near the horizon somewhere else, or hidden below the horizon until later in the night.
The browser experience waits for a user tap before requesting location. If location is unavailable, manual latitude and longitude still let the sky map calculate the same planet positions without relying on IP-based location.
How to observe Mercury from a city
Mercury is easiest to confirm when you first identify the direction and height, then check whether buildings, haze, or twilight glare block that part of the sky.
For this target, the practical cue is: A clear horizon and current Sun/Mercury separation matter most.
Urban observing works best from an open sidewalk, balcony, rooftop, or park edge with a clear horizon in the relevant direction. Even bright planets can disappear behind a roofline before they mathematically set.
Using planet filters in AR
When you open AR from a planet page, the viewer can focus the planet filter on the relevant target so the screen stays readable.
If several planets are visible close together, open the Filters panel and switch between all planets and a specific planet. This makes it easier to compare one marker with the real bright point instead of scanning a crowded overlay.
Use heading adjustment only after you have a known reference. If all markers seem shifted by the same angle, the issue is usually compass alignment, not the astronomy calculation.
Viewing details
Use these practical cues to connect the written guide with the live AR sky overlay.
Best viewing window
Visible only during favorable morning or evening elongations.
Sky region
Very low twilight sky close to the Sun’s direction.
Identification cues
A clear horizon and current Sun/Mercury separation matter most.
AR alignment tip
Use AR only after the Sun is safely below the horizon or physically blocked.
Frequently asked questions
Short answers for common skywatching questions before opening the AR viewer.
Why can’t I see Mercury every night?
Mercury stays close to the Sun from our viewpoint, so it is often hidden by daylight or twilight glare.
Can AR identify Mercury?
AR can show the expected direction after you provide location and time, but you still need a clear horizon and safe observing conditions.
Related sky guides
Use these pages to move from reading into the AR viewer with better context.
Open AR to find Mercury
Use the browser sky map to compare Mercury with the real sky from your location.