Create simple, countersink, and counterbore holes at sketch points, circle centers, and Mate connectors.
First detection of light from behind a black hole
Astronomers release an improved image of a black hole : NPR
White holes: Facts about black holes' neglected twins
Fuzzy first photo of a black hole gets a sharp makeover
What is this massive 'gravity hole' in the Indian Ocean?, World
Woman rescued after falling in hole
Supermassive black holes are very messy eaters •
Gravity Hole: Indian Ocean's giant 'gravity hole': All you may
Black Hole Week