This August 1989 image provided by NASA shows the planet...

This August 1989 image provided by NASA shows the planet Neptune photographed by the Voyager 2 spacecraft, processed to enhance the visibility of small features. The International Astronomical Union's Minor Planet Center announced Friday , Feb. 23, 2024, that astronomers have found three previously unknown moons in our solar system — two additional moons circling Neptune and one around Uranus. Credit: AP

WASHINGTON — Astronomers have found three previously unknown moons in our solar system — two additional moons circling Neptune and one around Uranus.

The distant tiny moons were spotted using powerful land-based telescopes in Hawaii and Chile, and announced Friday by the International Astronomical Union's Minor Planet Center.

The latest tally puts Neptune at 16 known moons and Uranus at 28.

One of Neptune's new moons has the longest known orbital journey yet. It takes around 27 years for the small outer moon to complete one lap around Neptune, the vast icy planet farthest from the sun, said Scott Sheppard, an astronomer at the Carnegie Institution for Science in Washington who helped make the discovery.

The new moon orbiting Uranus, with an estimated diameter of just 5 miles (8 kilometers), is likely the smallest of the planet's moons.

“We suspect that there may be many more smaller moons” yet to be discovered, he said.

On the latest episode of "Sarra Sounds Off," Newsday's Gregg Sarra talks with Dunia Sibomana-Rodriguez about winning a 3rd state title and possibly competing in the Olympics in 2028, plus Jared Valluzzi has the plays of the week. Credit: Newsday/Steve Pfost

Sarra Sounds Off, Ep. 17: Olympics a possibility for Long Beach wrestler? On the latest episode of "Sarra Sounds Off," Newsday's Gregg Sarra talks with Long Beach wrestler Dunia Sibomana-Rodriguez about pursuing a third state title and possibly competing in the Olympics in 2028, plus Jared Valluzzi has the plays of the week.

On the latest episode of "Sarra Sounds Off," Newsday's Gregg Sarra talks with Dunia Sibomana-Rodriguez about winning a 3rd state title and possibly competing in the Olympics in 2028, plus Jared Valluzzi has the plays of the week. Credit: Newsday/Steve Pfost

Sarra Sounds Off, Ep. 17: Olympics a possibility for Long Beach wrestler? On the latest episode of "Sarra Sounds Off," Newsday's Gregg Sarra talks with Long Beach wrestler Dunia Sibomana-Rodriguez about pursuing a third state title and possibly competing in the Olympics in 2028, plus Jared Valluzzi has the plays of the week.

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