Astronomers Spot Formation Site of Neptune-Like Exoplanet. Above: ALMA image of the disk around TW Hydrae. Several gaps are clearly depicted. Astronomers found that the size of the dust particles in the inner 22 AU gap is smaller than in the other bright regions and guess that a Neptune-like planet is located in this gap. Image credit: ALMA / ESO / NAOJ / NRAO / Takashi Tsukagoshi et al.
This picture of Neptune was produced from the last whole planet images taken through the green and orange filters on the Voyager 2 narrow angle camera. The images were taken at a range of 4.4 million miles from the planet, 4 days and 20 hours before closest approach.