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Dragon’s Eye in Space
Highlights
- NGC 628 Galaxy is captured
- The center of the galaxy looks like a dragon’s eye
- Images were created from data from the James Webb Telescope
Dragon Eye in Space: The Universe which we could only imagine, we are now able to see it sitting at our home. All this is being possible through telescopes. James Webb Space Telescope has brought a new revolution in this matter. The pictures he sent recently of our galaxy, clicked in space, are looking nothing less than a miracle. Before this, for many decades, the Hubble Space Telescope used to send very beautiful pictures from space to Earth. The James Webb Telescope has now become the most powerful human eye in space.
This telescope is traveling us to every corner of the Universe. Even places we’ve never seen before. It has started working well. Let us tell you that these pictures are not shown directly to you after being clicked. Rather, scientists use a set of different data captured by James Webb to create a picture of our galaxy far, far away. This picture is also of our Galaxy. which is purple. This is a spiral galaxy. Also called dragon’s eye.
How are amazing photos made?
Now let’s talk about this whole science. Gabriel Brammer of the University of Copenhagen in Denmark downloaded the dataset captured by JWST, the James Webb Space Telescope. While the Hubble Telescope has focused on capturing pictures of the Universe in the visible spectrum, the James Webb Space Telescope primarily captures images in the infrared spectrum. Human eyes cannot naturally see infrared light. Now to make this picture, Brammer took a dataset of infrared and converted it into visible light (red-green-blue).
After this, he combined the three pictures together, making this beautiful purple colored swirl picture. However, Brammer is not a member of the James Webb telescope team. At the same time, the name of the Galaxy captured in this picture is NGC 628. It looks purple in appearance because there is a mixture of chemicals in the dusty clouds of the Galaxy. “If our eyes could see at these mid-infrared wavelengths, the night sky would have looked a lot like this picture, which I think would be spectacular, maybe even a little terrifying,” Brammer says. At the same time, looking at the center of the galaxy, it looks as if the dragon is looking towards us.
What Makes Telescopes Great
Space-based telescopes allow us to see certain ranges of light, which are unable to pass through Earth’s dense atmosphere. The Hubble Space Telescope was designed to use both the ultraviolet (UV) and visible electromagnetic spectrum. JWST is designed to utilize a wide range of ‘infrared light’. This is a major reason why JWST can look further back in time than Hubble. Galaxies emit a range of wavelengths on the electromagnetic spectrum, from gamma rays to radio waves. All of these give us important information about the various physics happening in the Galaxy.
When galaxies are near us we can examine a wide range of these wavelengths to see what is happening inside them. But when galaxies are far away, we no longer have that facility. The light from the farthest galaxy, as we see now, is spread to red wavelengths due to the expansion of the Universe. This means that some of the light that was visible to our eyes when it was first emitted has lost its energy as the Universe expands. It is now in a completely different region of the electromagnetic spectrum. This is a phenomenon known as ‘cosmological redshift’.
This is where the features of JWST really shine. The wide range of infrared wavelengths detectable by JWST allows it to see the Galaxy that Hubble never could. With JWST’s giant mirror and spectacular ‘pixel resolution’ you have the most powerful time machine in the known Universe.
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