New Horizons flew past Neptune and its moon Triton in 2014 from a distance of about 2.45 billion miles (3.96 billion kilometers), but also just zoomed past the planet.

Planet Nine, on the other hand, is like a planetary Harry Kane, regularly shooting the TNOs past Neptune with finesse. "What we see in the data are a bunch of footballs inside the goal," said Batygin.

Oddball planet TOI-1231 b is a bit smaller than Neptune but has a substantial atmosphere, which gives it some interesting astronomical quirks. Skip to main content Menu ...

When Voyager 2 flew by Neptune in 1989, it sent back images that were processed to better reveal features like bands and a dark spot. But a new study says it's actually a greener planet.

Voyager 2, NASA's longest-running mission, explored Neptune during a historic encounter on Aug. 25, 1989, sending back humanity's first close-ups of the planet. News Today's news ...

In 1989, Voyager 2 became the first and only spacecraft to ever fly by Neptune, and images from that mission famously show a planet that's a deep azure color. But in reality, Neptune is far more ...