September 3, 2025: On September 3, Uranus and Neptune appear in the morning sky before sunrise. Use a binocular to trace Uranus near the Pleiades and Neptune close to Saturn, with both planets linked to rich discovery histories.
by Jeffrey L. Hunt
Chicago, Illinois: Sunrise, 6:19 a.m. CDT; Sunset, 7:20 p.m. CDT. Times are calculated by the US Naval Observatory’s MICA computer program. Check local sources for sunrise and sunset times.
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Daylight is rapidly decreasing at the mid-northern latitudes. At Chicago’s latitude, the sun shines for 13 hours as the equinox approaches.
Five Planet in a Line
A line of five planets nearly spans the sky before sunrise on September 3. Brilliant Venus and Jupiter shine in the east, while Saturn is in the southwest. Dim Uranus and faint Neptune are more challenging targets, rewarding for careful skywatchers.
Neptune
Begin with Neptune. About two hours before sunrise, center Saturn in a binocular’s field of view. The planet is less than halfway up in the southwest. Neptune is nearby, though difficult to see, even with optical aid. First, identify 27 and 29 Piscium (Psc), two faint stars below Saturn. They shine at only about 2% of Saturn’s brightness. Then, toward the top of the view, look for a reddish star. Neptune appears as a very faint bluish point, four times dimmer than this star and positioned 0.4° to the lower left and 1.8° above Saturn. Patience may be required across several mornings to glimpse the solar system’s most distant major planet.
Meanwhile, Uranus is easier to locate near the Pleiades star cluster, high in the southeastern sky. The reddish star Aldebaran lies below the cluster, which resembles a tiny dipper. Place the Pleiades near the top of the binocular field. Uranus, shining like an aquamarine star, appears near the bottom. Look for the stars 13, 14, 32, and 37 Tauri (Tau). They shine with about the same brightness as the planet.
Discovery
Uranus and Neptune carry fascinating stories. Uranus was first identified as a planet in 1781 by William Herschel, the first planet found with a telescope, although it had previously been misidentified as a star. Herschel noted that the planet moved compared to the distant stars from night to night.
Neptune followed in 1846, located by Johann Galle after its position was mathematically predicted by Urbain Le Verrier. These discoveries expanded the known solar system for the first time in modern history, confirming that unseen worlds could be revealed through persistence and calculation.
New Uranian Moon
Recently, astronomers identified a new moon orbiting Uranus, raising its confirmed count to 29. The tiny moon was first observed with the James Webb Space Telescope earlier this year.
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