1. On March 27, 2013, the National Aeronautics and Space Administration (NASA) released a ultra-high resolution photo of the Milky Way galaxy. 2. The original image of this photo has a resolution of approximately 884 million pixels, with the original file sizes being 24GB for PSD format and 3.9GB for Tiff format.3. Some netizens have successfully downloaded this image. It is reported that on a computer equipped with an Intel Core i7 processor, 8GB of memory, and a 64-bit operating system, it takes about 13 minutes to open the photo using a 64-bit version of Photoshop CS6.4. Opening such a photo requires not only 24GB of storage space to save the image but also approximately 30GB of space for temporary cache.5. In front of this photo, our Earth, in the vast universe, seems tiny. Facing such a vast cosmos, we may not be alone.6. Here is the download link for the 3.9GB version (40000*30000) [link] and the 24GB version (108500×81500) [link].7. These two files are in Tiff and PSB formats, respectively.8. This image not only showcases the clarity of ultra-high-resolution images but also reflects that not every computer can easily handle such large files.9. Let's普及 some basic knowledge: A pixel is the smallest unit of a digital image, representing the most basic element of an image, and it is usually represented by PPI (pixels per inch).10. For example, a resolution of 300x300PPI means that there are 300 horizontal and vertical pixels per square inch, totaling 90,000 pixels.11. Pixels are the basic color units on a screen, and zooming in on an image allows us to observe a continuous tone made up of similar color squares.12. The more pixels there are, the broader the range of color shades, which allows for a more realistic representation of colors.