This is a classic exercise for visualizing just how big our Solar System really is. Both the relative size and spacing of the planets are demonstrated in this outdoor exercise, using a grapefruit to represent the size of the Sun.
This half-sunken sea-liner is named the World Discoverer. It met its fate on April 30th, 2000, when it hit an uncharted reef in the Solomon Islands. Now it has become a popular tourist attraction and is visible from space on Google Maps.
Before the wreck, this expedition cruise-liner was used by several companies. Each season, just over 700 tourists traveled to Antarctica on the World Discoverer.
A series of recordings made by two Italian brothers in the early 1960s suggest that, before Yuri Gagarin successfully blasted off into orbit and returned home, several Soviet astronauts perished, their pleas for help caught on tape. We take a look at whether the Soviet Union really did cover up its early space disasters.
NASA’s Interstellar Boundary Explorer, or IBEX, recently mapped the boundaries of the solar system’s tail, called the heliotail. By combining observations from the first three years of IBEX imagery, scientists have mapped out a tail that shows a combination of fast and slow moving particles. The entire structure twisted, because it experiences the pushing and pulling of magnetic fields outside the solar system.
It can be called the morning or evening star, depending on where you are or what time it is, but it is anything but a star; in fact it is one of our nearest planetary neighbours, Venus.
What about situations we can’t know to be prepared for, such as, well, alien invasion? If you wonder if we actually have an alien-contact contingency plan watch this video.