Why is a planet “up” but marked too bright?

The planet can be above the horizon while the Sun is still up or in bright twilight. Naked-eye spotting needs a darker sky — the tool flags daytime and twilight windows so you do not wait outside for an invisible target.

What is the ideal viewing time?

It is usually when the planet is highest during a useful dark or twilight window. Select the planet to clock the sky sim to that moment and read the facing direction and altitude.

Alt/az vs equatorial grid — which should I use?

Alt/az matches what you see standing outside (up from the horizon, compass directions). Equatorial follows the celestial coordinate grid used on charts and mounts. Use alt/az for naked-eye spotting.

Tools

Which Planets Are Visible Tonight? Free

Pick a planet to preview its best viewing window — sky sim, bearings, and rise/set so you know when and where to look.

Georgetown

6.8000°N, 58.1700°W

Best · Venus

In 4 h 5 m

Tonight · 10:41 PM

W · 33°45 min window12:48 PM12:57 AM

11:06 PMbest · 10:41 PM11:51 PM

Grid

When to look

Ranked by visibility score (brightness + altitude + sky) · Tonight · 6:36 PM

Best target · score 77

Venus

Up but sky is bright · mag -4.3

Up now(4)

Above the horizon — highest visibility score first

Coming up(3)

Dimmed for now — best time to see each is highlighted

Frequently asked questions

Why is a planet “up” but marked too bright?: The planet can be above the horizon while the Sun is still up or in bright twilight. Naked-eye spotting needs a darker sky — the tool flags daytime and twilight windows so you do not wait outside for an invisible target.
What is the ideal viewing time?: It is usually when the planet is highest during a useful dark or twilight window. Select the planet to clock the sky sim to that moment and read the facing direction and altitude.
Alt/az vs equatorial grid — which should I use?: Alt/az matches what you see standing outside (up from the horizon, compass directions). Equatorial follows the celestial coordinate grid used on charts and mounts. Use alt/az for naked-eye spotting.

Ephemerides use astronomy-engine for local altitude, azimuth, rise/set, and sun altitude. Pair with Stargazing Weather for clouds and the 3D Solar System page for orbital context.