Inspired by the 1970s Space Invaders video game, a small and colorful mosaic has been found on the International Space Station by ESA astronaut Samantha Cristoforetti.
The French artist known as Invader has established his urban alien artwork in more than 60 cities all over the world, including Rome, Paris, New York, Manchester, Hong Kong and Los Angeles. In 2012 he sent a mosaic into the stratosphere on a balloon.
Following the invasion of Earth orbit, these space invaders have been spotted not only in the… (Finish Reading on ESA)
The magnetic field protects us from cosmic radiation and charged particles that bombard Earth, but it is in a permanent state of flux.
Magnetic north wanders, and every few hundred thousand years the polarity flips so that a compass would point south instead of north. Moreover, the strength of the magnetic field constantly changes – and it is currently showing signs of significant weakening.
The field is particularly weak over the South Atlantic Ocean – known as the South Atlantic Anomaly. This weak field has indirectly caused many temporary satellite ‘hiccups’ (called Single Event Upsets) as the satellites are exposed to strong radiation over this area.