Black Wreckage

  Oct 19, 2017 Black holes are said to collide. NASA launched the Nuclear Spectroscopic Telescope Array (NuSTAR) aboard a Pegasus rocket on June 13, 2012. A new X-ray image highlights a “monster of a galactic mashup”: two colliding galaxies, known as Arp 299, with “supermassive black holes” inside them. …

Continue reading

Print Friendly, PDF & Email

Explosive Mystery

  Oct 18. 2017 Electricity plays a role in Solar System dynamics. Editor’s Note: Due to Northern California wildfires, the Picture of the Day will be on a temporary leave of absence. In the interim, please enjoy these articles from the archives.  Mimas is a small moon, only 397 kilometers …

Continue reading

Print Friendly, PDF & Email

Twin Tails

  Oct 17, 2017 Two types of pulsars. The basic idea is to shove all fundamental difficulties onto the neutron and to do quantum mechanics in the nucleus. — Werner Heisenberg: Letter to Niels Bohr, June 20, 1932. Quoted in Uncertainty: The Life and Science of Werner Heisenberg (1992) by …

Continue reading

Print Friendly, PDF & Email

Electrical Expressions

  Oct 12, 2017 Electric charge flow in space defines many phenomena. Plasma is not a substance, it is a condition. Matter is categorized by four states: solid, liquid, gas, and plasma, therefore, those conditions cannot be analyzed in simple terms. Solids exhibit multiple aspects, including dimension, temperature, composition, etc. …

Continue reading

Print Friendly, PDF & Email

Earth’s Electric Fields

Oct 11, 2017 Magnetic reconnection does not drive electromagnetic events. Upper regions of Earth’s atmosphere are influenced by solar emissions, because the ionosphere is connected to the Sun by filaments of electric charge. At 150 kilometers altitude, Earth’s electromagnetic field exhibits the greatest conductivity in what is called the “dynamo …

Continue reading

Print Friendly, PDF & Email

Recent Arrival

  Oct 9, 2017 Martian meteorites are most likely a few thousand years old, at most. The Martian lithosphere is composed of iron and silicon, although they are primarily bound with oxygen. Silicon dioxide and iron oxides are the main constituents of Martian regolith. The atmospheric density on Mars is …

Continue reading

Print Friendly, PDF & Email

Dry Sands

  Oct 6, 2017 The search for water on Mars continues. According to a recent press release, Mars may not possess the large quantities of water-ice that previous observations suggested. Data provided by the Mars Express orbiter points to, “ice-free, porous, windblown sand” and not subsurface ice. Thomas R. Watters, …

Continue reading

Print Friendly, PDF & Email