JWST’s Neptune: The best infrared view in 30 years

Neptune is the keeper of the deep: The last known major planet from the Sun, the god of the boundless sea beyond the inner solar system that marks the shore of the black depths of interstellar space.

Despite being four times the diameter of Earth, its distance of a soul-chilling 4.5 billion kilometers from us makes Neptune tiny and faint even through large telescopes — which is why it wasn’t discovered until 1846.