NASAさんのインスタグラム写真 - (NASAInstagram)「Today is Satur(n)day! 🪐 @NASAWebb saw the planet on June 25, part of science in progress. Saturn appears dark because methane gas in its atmosphere absorbs almost all the sunlight in near-infrared. However, the icy rings shine brightly. This research tests how well Webb can detect faint moons around Saturn and its bright rings. Some of the planet’s known moons are visible in this image, including Enceladus, which Webb explored recently. Image Description: The background is mostly dark. At the center is a dark orange-brown circle, surrounded by several blazing bright, thick, horizontal whiteish rings. This is Saturn and its rings. There are three tiny dots in the image—one to the upper left of the planet, one to the direct left of the planet, and the lower left of the planet. These are three of Saturn’s moons: Dione, Enceladus, and Tethys, respectively. There is a slightly darker tint at the northern and southern poles of the planet. The rings surrounding Saturn are mostly broad, with a few singular narrow gaps between the broader rings. There is an innermost, thicker ring, and next to that is a brighter, wider ring. Traveling farther outward, there is a small dark gap before another thicker ring. In the thicker ring, there is a narrow faint band. There is then an outermost, faintest, thinnest ring. #NASA #Space #Saturn #Webb #JWST #UnfoldTheUniverse #SolarSystem」7月1日 22時55分