The James Webb Space Telescope made its observations using the Near Infrared Spectrograph (NIRSpec) instrument, and the raw images have been uploaded to the unofficial JWST Feed website, although the processed images have not yet been released.
This means we have a small trailer of what will happen when the noise is cleaned up and the images are colourised. We suspect it will be nothing short of breathtaking.
There are numerous images in the image stream, many of which show a glowing white blob with just ears, like a halogen flashlight shining on reflective fabric, but a handful stand out in particular.
Firstly, there is this image where Saturn itself is almost black. This is probably due to the filters used. Although Saturn and its rings both radiate at infrared and near-infrared wavelengths, the wavelength range is different.
As NASA explained in 2010, "Saturn's rings reflect sunlight at 2 microns, but not at 3 and 5 microns... Saturn's high-altitude haze reflects sunlight at both 2 and 3 microns."
Both filters used for these images are in the longer wavelength bands, causing the rings to shine almost isolated against the darkness of space. The white speckles you see in the images are noise and will no doubt be cleaned up for the final images.
Then there are images taken with a short-wavelength filter in which Saturn's cloud bands are visible, the rings shining brightly around the centre like fluorescent ring light.
The observations were carried out by a team led by planetary scientist Leigh Fletcher from the University of Leicester in the UK. The team hopes to use the NIRSpec data to learn more about Saturn's moons and rings.
They say NIRSpec should be sensitive to discovering new moons around the planet - a timely mission given that Saturn temporarily lost the title of planet with the most moons to Jupiter for a few months earlier this year.
The camera could also provide a new point of contact for ongoing time-domain observations following the end of the space probe Cassini in 2017.
In their proposal, they also requested images of certain moons of Saturn, as well as observations with JWST's Mid-Infrared Instrument (MIRI). These have not yet arrived.
Because the images are so new, the science is undoubtedly ongoing. We can't wait to see what they look like when they're all polished and shiny, and what exciting new things Fletcher and his team might discover from them.
Source: https://jwstfeed.com/
Yorumlar
Fantastic
Yorum yazmak için lütfen giriş yapınız