There's a giant asteroid flying towards Earth. Detected by a Russian robotic telescope, it's one of the largest and most dangerous space rocks approaching. A huge asteroid that is up to 1 km wide is said to pass so close to the Earth on April 19th that the minor planet center has branded it potentially hazardous. Asteroid 2014, J-O-25, is said to make its closest approach to the Earth 4 over 400 years, even though it is hurtling towards the Earth at an alarming speed it will pass us safely. Well, so they say. Astronomers describe it as a bright object and believe it will be among the best targets for radar observations this year. To other big asteroids, 2003, BD-44, and 1999, C-U-3, which are both nearly 2 km wide, will also pass by our planet shortly. However, they won't come as close as 2014, J-O-25. There's no asteroid currently on a collision course with the Earth however asteroid Apophis, which gave the world a brief scare a few years back when NASA said it could wipe us all out in 2036, may yet prove a potentially deadly scenario for life on the Earth. When Apophis approaches the Earth in 2029, the gravitational forces may alter the trajectory of the object enough to make its impact in its next close approach in 2036. Apophis Discovery in 2004, Apophis was briefly estimated to have a 2.7% chance of impacting the Earth in 2029. Additional measurements later showed that there was no impact risk at that time, but as it swings past the Earth and around the Sun, there is a very real chance it may have been altered enough to impact the Earth and cause a global cataclysm. However, additional factors can influence the predicted motion in ways that depend on rarely known details, such as the spin of the asteroid, its mass, the weight, reflects, and absorbs the Sun light, radiates heat, and the gravitational pull of other asteroids passing nearby. These were examined along with the effect of Earth's non-uniform gravity field during encounters and limitations of the computer hardware performing the calculations. One would normally look for the influence of such factors as they gradually alter the trajectory of years, but for Apophis, the chances remain small until amplified by the passage through Earth's gravity field during the historically close approach in 2029. What do you guys think our chances are of a cataclysmic impact in the foreseeable future? Do we need to prepare for impact now? How would you do that? Comments below? Thanks for watching.