This weekend’s “Galaxy Report” ranges from the fragile lifespan of technological civilizations to Stephen Hawking’s ‘lost’ Nobel Prize to probing for life on Saturn’s moon, Titan to colonizing Mars could accelerate human evolution.
“The final stage in the life of a star,” observes physicist Carlo Rovelli in Seven Brief Lessons on Physics, “where the quantum fluctuations of space-time balance the weight of matter, is what is known as a ‘Planck star’. If the sun were to stop burning and to form a black hole, the event horizon would measure about six kilometers in diameter. The black hole’s event horizon is not a physical barrier, but simply the boundary where the black hole’s gravitational field becomes so intense that the escape velocity exceeds the speed of light. Nothing, not even light, can escape the event horizon.
Another big week for “The Galaxy Report” with insights into our Solar System’s mysterious magnetic fields to the first planet found to be orbing three stars to physicist Leonard Susskind, founding director of the Stanford Institute for Theoretical Physics, on why black holes are so astonishing. (more…)
It’s been another prolific week in the Cosmos from Homo sapiens might be the children of black holes and neutron stars to intrepid scientists are questioning Einstein’s theory of spacetime. Could he be wrong? We wouldn’t bet on it.