NASAのインスタグラム(nasa) - 4月7日 00時25分
Uranus. (Go ahead, get it out of your system. We tried.)
The @NASAWebb telescope highlights 11 of the seventh planet’s 13 rings. Only Voyager 2 and Keck (with adaptive optics) have imaged the planet's faintest rings before, and never as clearly as Webb.
In the first image, check out the polar cap (bright white area) on the right side. Webb reveals a subtle enhanced brightening at its center. This polar cap appears in the direct sunlight of summer and vanishes in the fall. Webb's data will help us to understand this mystery.
Take a look at Uranus’s moons in the second image. Most of its 27 moons are too small and faint, but the 6 brightest ones are visible. (The other bright objects are background galaxies.)
This was only a 12-minute exposure image! It's just the tip of the ice(planet)berg for what Webb will uncover. Read more at the link in @NASAWebb’s bio.
Image descriptions:
1. The planet Uranus on a black background. The planet appears light blue with a large, white patch on the right side. On the edge of that patch at the upper left is a bright white spot. Another white spot is located on the left side of the planet at the 9 o’clock position. Around the planet is a system of nested rings. The outermost ring is the brightest while the innermost ring is the faintest. Unlike Saturn’s horizontal rings, the rings of Uranus are vertical and so they appear to surround the planet.
2. The planet Uranus is on a black background just left of center. It is colored light blue and displays a large, white patch on the right side as well as two bright spots and a surrounding system of nested rings oriented vertically. Just below the planet at the 7-o’clock position is a faint blue point labeled Puck. Brighter blue points at 8 o’clock, 5 o’clock, and 3 o’clock are labeled Ariel, Miranda, and Umbriel, respectively. Farther from the planet, two additional blue points at 7 o’clock and 5 o’clock are labeled Titania and Oberon. Faint orange smudges are scattered in the background.
Credit: NASA, ESA, CSA, STScI, with image processing by Joseph DePasquale (STScI)
#JWST #JamesWebbSpaceTelescope #Uranus #SolarSystem #NASA #space
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