2023-12-19 09:38:40
The James Webb Space Telescope (JWST) was launched on Christmas Day 2021, and it has been almost two years without realizing it. To celebrate this milestone, the JWST team, NASA and ESA released a “dream” recent photo of Uranus. In addition to Uranus’s rings, you can see a series of Uranus’s moons from different perspectives.
The most unique thing regarding Uranus in the solar system is that its rotation axis tilt reaches 97 degrees, which means that it is basically lying sideways. This means that in its long orbit of regarding 84 Earth years, there will be two positions where the Earth will see the edge of the ring, and the other two positions will be the complete front of the ring.The current position of Uranus is still a little short of the most positive, but it can already allow us toSeeing Uranus surrounded by complete rings, you can even see the outermost faint “Zeta” ring.。
The dreamy color of Uranus comes from the filter selected by the NIRCam infrared camera. Since the human eye cannot see infrared light, this color has a somewhat “artistic” component in it and is not the color of visible light. What is particularly eye-catching here is Uranus’s “North Pole Cloud Cap.” In visible light images, Uranus looks like a blue-green ball of the same color, but in infrared rays, you can clearly see that the clouds over the North Pole are significantly different from the “low-latitude” clouds. Due to the temperature difference, the cloud cover here appears bright white, while at lower latitudes it is a darker blue-purple color.
JWST Uranus
In addition to Uranus itself, in itsThere are many small points of light scattered around, which are the many satellites of Uranus.. Among them, the five largest ones, Ariel, Umbriel, Titania, Oberon and Miranda, are respectively at 4 o’clock and 2 o’clock on Uranus. , 10 o’clock, 1 o’clock and 6 o’clock, and another 9 of the 27 satellites of Uranus can be seen in the picture.
Astronomers are waiting for Uranus to slowly approach its summer solstice, the moment when its North Pole faces the sun. The summer solstice of Uranus will arrive approximately in 2028. JWST will continue to observe Uranus regularly to understand whether its cloud structure, cloud cover size, composition, etc. will be affected by the approach of the summer solstice.
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