Wednesday, March 06, 2013
Russia attempted to salt Phobos with these things, but the rocket failed so Phobos was spared.
That's (above) an artist's rendering of our own galaxy. It's a spiral emanating from a bar. Probably the odd shape is the outcome of a collision with another galaxy. It must have happened a long time ago because it takes a while for merged galaxies to find a stable shape.
Just how old is our galaxy? Believe it or not, our own is one of the oldest galaxies we know of. It began to form long ago, shortly after galaxies first came into existence.
Question: which is older, the Earth or the Sun? Answer: the Earth. The proto-Earth formed when the Sun was still a hot ball of gas, before it ignited and became a star.
Probably I'm the only person on this site who failed to see this footage when it was new. It's the meteorite that recently fell in the Urals. Although the rock is thought to have been no bigger than a car, the impact energy is estimated to have been that of several Hiroshimas.
Posted by Eddie Fitzgerald at 11:56 PM