Everyone talks about how many megapixels their camera has. That is how many 1,000,000 pixels. So the iPhone has 8,000,000 pixels. I want to share with you the [1.5 gigapixels]1 that Hubble Space Telescope (HST) took of Andromeda, the nearest galaxy to us. There is a press release with videos (with good narration) and photos are available on hubblesite.org. But here is my favorite video2:

  1. that is 1,000,000,000 pixels 

  2. I hope you can see this in 4K since it is available at that resolution.