Happy 455th birthday to one of the first modern scientists, Galileo. With the aid of an early telescope, he helped remove Earth from the center of the universe.
On February 15, 2013, a small incoming asteroid created a meteor – brighter than the sun – over Russia. It exploded in the air over the city of Chelyabinsk.
Five years ago today, a small, previously unknown asteroid entered Earth's atmosphere at 66 000 km/h and exploded high above Chelyabinsk, Russia, with 20–30 times the energy of the Hiroshima atomic bomb.
The scientific team that used YouTube videos to determine the trajectory of the Chelyabinsk meteor used the same method to track the trajectory of the bright meteor that crossed the sky over Cuba on February 1.
Picture from a crusie ship deck leaving the Havana Harbor at the exact time of the Cuba meteor. Image via Rachel Cook.
Did you know that our planet has radiation donuts? These giant, donut-shaped clouds of radiation are called the Van Allen Belts.
image via NASA/Goddard Space Flight Center/Scientific Visualization Studio