Topic Image Rail

quartz spheres with Einstein photo

TESTING EINSTEIN  The Gravity Probe B mission used almost perfect spheres made of quartz to measure two predicted effects of Einstein’s general theory of relativity. 

illustration of Earth's magnetic field

MAGNETIC SHIELD  The planet’s magnetic field isn’t on the cusp of a catastrophic flip of the magnetic poles, new lava analysis suggest. A magnetic reversal would weaken Earth’s magnetic field, causing auroras closer to the equator, as seen in this artist’s illustration. 

TRAMPOLINING H2O  A water droplet initially at rest bounces higher and higher in this time-sequence image.

Subscribe to RSS - Physics