Astronomy & Cosmology articles

NASA Finds Unusual Origins of High-Energy Electrons

NASA Finds Unusual Origins of High-Energy Electrons

High above the surface, Earth’s magnetic field constantly deflects incoming supersonic particles from the sun. These particles are disturbed in regions just outside of Earth’s magnetic field – and some are reflected into a turbulent region called the foreshock. New observations from NASA’s THEMIS – short for Time History of Events and Macroscale Interactions during

How the Moon Got its Off-Kilter Orbit

Scientists say there are a couple of problems with the textbook theory of how Earth’s moon formed. One is the moon’s surprisingly Earth-like composition. Another is that if the moon condensed from a disk of material rotating around Earth’s equator, it should be in orbit over the equator. But the moon’s orbit is tilted 5

Astounding Discovery May Invalidate Solar System Formation Theories

The discovery of two massive companions around one star in a close binary system—one so-called giant planet and one brown dwarf, or “failed star”—suggests that everything we know about the formation of solar systems might be wrong, say University of Florida astronomy professor Jian Ge and postdoctoral researcher Bo Ma. The first, called MARVELS-7a, is 12