“We have the Local Bubble in the interstellar medium. We’re right on its edge,” says Adrian Melott at the University of Kansas. “It’s a giant region about 300 light years long. It’s basically very hot, very low-density gas — nearly all the gas clouds have been swept out of it. The best way to manufacture a bubble like that is a whole bunch of supernovae blows it bigger and bigger, and that seems to fit well with idea of a chain. When we do calculations, they’re based on the idea that one supernova that goes off, and its energy sweeps by Earth, and it’s over.
The “Planet Earth Report” connects you to the days’ headlines on the discoveries, people, and events changing our planet and the future of the human species.
“With these findings, Ceres has gained a pivotal role in assessing the origin, evolution and distribution of organic species across the inner solar system,” said Southwest Research Institute scientist Simone Marchi. “One has to wonder about how this world may have driven organic chemistry pathways, and how these processes may have affected the make-up of larger planets like the Earth.”
“We’ve seen big things happen in Earth’s history—new species evolved, life persists and species survive. But many species will be lost, and we live on this planet,” says paleoecologist Jack Williams, at the University of Wisconsin-Madison.
Today’s eclectic coverage of TV programs broadcast and streamed on the (often “far side”) state of affairs on our pale blue planet, signaling our presence to other possible civilizations in the Milky Way.
“An odyssey of discovery beyond our imaginations,” NASA Goddard Spaceflight Center. For the second time in history, a human technology has reached the space between the stars. The Voyager 2 probe now has exited the heliosphere – the protective bubble of particles and magnetic fields created by the Sun.
