[It may take a minute to load, it's a big file.]
Wow! You can see the Sun's rotation over the four hour interval these pictures were taken, and then the Moon flashes by. The Moon is dark because it's between us and the Sun, so were seeing the unlit side (I have a diagram showing an approximation of the geometry of this event on my other page about it).
Moreover, scientists can use images of the sharp-edged Moon against the Sun's disk to check on the optics of the observatory. That information can be used to sharpen the images even more. So this is fantastic, fantastically beautiful, and fantastically useful, too.
Tip o' the sunglasses to NASAGoddard.
TODAY IN SLATE
Ben Bradlee Dead at 93
The legendary Washington Post editor presided over the paper’s Watergate coverage.
The Congressional Republican Digging Through Scientists’ Grant Proposals
Renée Zellweger’s New Face Is Too Real
Sleater-Kinney Was Once America’s Best Rock Band
Can it be again?
Whole Foods Is Desperate for Customers to Feel Warm and Fuzzy Again
I’m 25. I Have $250.03.
My doctors want me to freeze my eggs.
Forget Oculus Rift
This $25 cardboard box turns your phone into an incredibly fun virtual reality experience.