Apophis danger downgraded

Apophis is a 250-meter-wide rock with a special designation: it's a near-Earth asteroid, meaning it passes close to our planet. In fact, in April of 2029 it will pass so close to the Earth -- just under 30,000 kilometers (18,000 miles) -- that it will actually get between us and some of our geosynchronous satellites! Because it will come so close, the Earth's gravity will change its orbit. There is a region of space called a keyhole (it's actually kidney-bean shaped) and if Apophis passes through it like an arrow through a bulls-eye, the Earth's gravity will change the asteroid's orbit enough that in seven more years, in 2036, Apophis will hit the Earth! The odds of it passing through the keyhole are low; up until recently they've been quoted as 1 in 45,000. Not a huge concern, but worth keeping an eye on. However, new observations have lowered these ...