**Astronomy Picture of the Day**

原始 JSON

{
  "kind": 1,
  "id": "22bacc7808e862a46add03a769858c1795223460278392635a699829d3c40505",
  "pubkey": "e85ed75286cb77475776c1007df8c4ff1c9c68eff91c3627347b065c5bf4dc78",
  "created_at": 1782187528,
  "tags": [],
  "content": "**Astronomy Picture of the Day**\n\n23 June 2026\n\n**Flying Past Neptune's Moon Triton**\n\nImage: https://www.shutterstock.com/image-photo/british-shorthair-cat-hiding-under-260nw-1655111092.jpg\n\nImage Credit: NASA ; JPL , Voyager 2, Digital composition: Paul Schenk ( LPI , USRA )\n\nWhat would it look like to fly past Triton , the largest moon of planet Neptune ? Only one spacecraft has ever done this -- and the images of this dramatic encounter have been gathered into a video . In 1989, the Voyager 2 robotic spacecraft shot through the Neptune system with cameras blazing. Triton is slightly smaller than Earth's Moon but has ice volcanoes and a surface rich in frozen nitrogen . The first sequence in the video shows Voyager's approach to Triton , which, with the exception of an overall false green tint , appears in approximately true color. The mysterious cantaloupe terrain seen under the spacecraft soon changed from light to dark, with the terminator of night crossing underneath . After closest approach, Voyager pivoted to see the departing moon, now visible as a diminishing crescent . In 2015, the robotic New Horizons spacecraft famously flew past Pluto , an orb of similar size to Triton.\n\n#APOD #Voyager2 #Triton #Neptune #IcyMoons #FrozenNitrogen\n\nhttps://apod.nasa.gov/apod/ap260623.html\n",
  "sig": "edd760515165af811d124d4a708ae845d03dd48c9d104787f8af492d06302143414d57acfccfb3d6d30c9de0529fcb65ae67b64b683d2aacd80ff2a52bec9c8e"
}