Near-Earth Objects (NEOs) pose a substantial threat to our planet because they have the potential to collide with Earth. Such impacts have occurred in the past, causing significant damage. For instance, the asteroid that caused the extinction of the dinosaurs is a stark reminder. Because of these potential threats, Congress tasked NASA with the responsibility of finding and studying NEOs. Understanding the paths and characteristics of these objects is critical for developing strategies to deflect or mitigate their impact.
Asteroid impacts can lead to a range of catastrophic events, such as:
- Large explosions affecting vast areas
- Tsunamis, if they hit oceans
- Climate changes due to debris in the atmosphere
Knowing which NEOs are on a possible collision course with Earth allows scientists to devise plans to prevent such disasters.