Since Voyager 2s fly-by, the brightest rings (Adams and Le Verrier) have been imaged with the Hubble Space Telescope and Earth-based telescopes, owing to advances in resolution and light-gathering power. They are visible, slightly above background noise levels, at methane-absorbed wavelengths in which the glare from Neptune is significantly reduced. The fainter rings are still far below the visibility threshold for these instruments. In 2022 the rings were imaged by the James Webb Space Telescope, which made the first observation of the fainter rings since the Voyager 2s fly-by.
