Another planet similar to the planet...

                        WILL AN ASTEROID HIT SOON

            (IDA, an asteroid 35 miles long, has its own moon, as a NASA mission discovered.)

 If an asteroid hit Earth, its effect on planet would depend  upon size. Earth's atmosphere usually protects  the planet from asteroids less The than 150 feet in diameter. Objects to 3,000 feet across imp create intense localized damage. Such impacts every few centuries. Asteroids more than 5,000 feet.across would kick up dust and cause  an "impact winter." Such hits occur once or twice every million years. asteroid its own sion dis The Chicxulub crater in Mexico was probably the result of an asteroid impact 65 maion years ago. The dust loged produced ay have caused a climate change that led to the extinction of are To ous a Cour the dinosaurs
To date,strenomers have cataloged some ,1,541 potentially hazardous asteroids (PHAs), though none are believed to be on a collision course with Earth