Scientific American 15 Aug 2019, 18:00 UTC Canadian telescope finds eight more repeating blasts—energetic events from deep in the cosmos
Centauri Dreams 15 Aug 2019, 17:22 UTC So much rides on the successful launch and deployment of the James Webb Space Telescope that I never want to take its capabilities for granted. But assuming that we do see JWST safely orbiting the L2 Lagrange point, the massive instrument will stay in alignment with Earth as it moves around the Sun. allowing its sunshield to protect it from sunlight and solar heating.
Starts With a Bang! 15 Aug 2019, 14:01 UTC Every year, the Earth completes an orbital revolution around the Sun, returning to the same relative position that it last occupied a year prior. On the night of August 12, 2019, the Perseid meteor shower will reach its peak, on practically the same date that it did the year prior, as the Earth makes its annual pass through the cometary debris stream that causes those spectacular light streaks across our skies. The Perseids are very special among meteor showers for a number of reasons: they’re fast, they’re bright, and they’re extremely reliable. Year after year, even when there’s a full Moon present, the Perseids often put on a show unsurpassed by any other shower. Yet they’re also a reminder of the impending doom that’s headed our way: our eventual collision with an orbit-crossing comet or asteroid. If the body that created the Perseids ever collides with Earth, it will be a worse catastrophe than the extinction of the dinosaurs. Here’s the story everyone should know.
Universe Today 14 Aug 2019, 20:18 UTC What, exactly, is the inside of a neutron star like? A neutron star is what remains after a massive star goes supernova. It’s a tightly-packed, ultra-dense body made of—you guessed it—neutrons. Actually, that’s not absolutely true.
New Scientist 14 Aug 2019, 15:00 UTC Radioactive iron buried in Antarctic snow must have come to Earth from interstellar dust, according to a new study. This suggests that Antarctic snow and ice of different ages could be used to tell us about the patches of interstellar dust Earth has passed through, and so track its path across the Milky Way.
Air & Space Magazine 13 Aug 2019, 17:00 UTC A group of researchers led by François Costard from the French National Centre for Scientific Research reports in a recent issue of the Journal of Geophysical Research—Planets on a dramatic tsunami that occurred on Mars billions of years ago, before the planet turned into the dusty desert we see today.
Starts With a Bang! 13 Aug 2019, 14:01 UTC If you’ve ever heard of Albert Einstein, chances are you know at least one equation that he himself is famous for deriving: E = mc². This simple equation details a relationship between the energy (E) of a system, its rest mass (m), and a fundamental constant that relates the two, the speed of light squared (c²). Despite the fact that this equation is one of the simplest ones you can write down, what it means is dramatic and profound. At a fundamental level, there is an equivalence between the mass of an object and the inherent energy stored within it. Mass is only one form of energy among many, such as electrical, thermal, or chemical energy, and therefore energy can be transformed from any of these forms into mass, and vice versa. The profound implications of Einstein’s equations touch us in many ways in our day-to-day lives. Here are the five lessons everyone should learn.