Questions with the keyword 'black hole'

• why is there a black hole? by 965spdm29 to Tim, Sammie Comments: (No comments so far )
• Does every black hole contain a singularity? by Mia&Rydon(RIA) to Sammie Comments: (No comments so far )
• 1)Can u build an igloo on the moon? 2)Appart from stars and black holes are there and PLANETS bigger than the sun if by Perry Wernham to Lisa, Mark, Rachel, Sammie, Stephen, Tim Comments: (No comments so far )