2025, September 3: Uranus and Neptune Before Sunrise

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.

Uranus, rings and Moons from NASA's Webb Space Telescope
Photo Caption – Uranus, rings and Moons from NASA’s Webb Space Telescope (NASA Photo)

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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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

Binocular view: Saturn and Neptune
Chart Caption – 2025, September: Through a binocular, look for Saturn and 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.

Binocular view: Uranus is near Pleiades star cluster.
Chart Caption- 2025, September: Through a binocular Uranus appears in the same field of view with the Pleiades star cluster.

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

This is an image of the planet Uranus taken by the spacecraft Voyager 2 in 1986. The Voyager project is managed for NASA by the Jet Propulsion Laboratory.
Photo Caption – This is an image of the planet Uranus taken by the spacecraft Voyager 2 in 1986. The Voyager project is managed for NASA by the Jet Propulsion Laboratory.

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.

This contrast enhanced color picture of Neptune was acquired by Voyager 2 at a range of 14.8 million kilometers (9.2 million miles) on August 14, 1989. (NASA photo)
Photo Caption – This contrast enhanced color picture of Neptune was acquired by Voyager 2 at a range of 14.8 million kilometers (9.2 million miles) on August 14, 1989. (NASA photo)

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

Uranus
Photo Caption – Astronomers using NASA’s James Webb Space Telescope discovered a new moon orbiting Uranus. This image shows the moon, designated S/2025 U1, as well as 13 of the 28 other known moons orbiting the planet. Due to the drastic differences in brightness levels, the image is a composite of three different treatments of the data, allowing the viewer to see details in the planetary atmosphere, the surrounding rings, and the orbiting moons. Photo by NASA, ESA, CSA, STScI, M. El Moutamid (SwRI), M. Hedman (University of Idaho)

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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