A few years ago, I wrote some bookmarklets for quickly viewing recent MODIS satellite images - I've now moved their hosting here
Just drag the links below into your bookmarks or onto your bookmarks bar to save them. Then click them to access the appropriate imagery. It'll offer to download a ".cgi" file - download it, then rename the extension to be ".kml". Then you can double click it to open in Google Earth.
- Today's MODIS - Always loads whatever day it is
- Yesterday's MODIS - always loads imagery for a full day before the current date
Credit goes to the NASA GIBS system and their documentation wiki. These bookmarklets are just a slim wrapper around the GIBS API that insert a desired date.