PBS Space Time Season 2015 Episode 39 Challenge: Can You Save Earth from a Killer Asteroid?

In this episode of PBS Space Time, we explore the possibility of Earth being struck by a killer asteroid and the potential methods to save our planet from destruction. The episode starts by discussing the likelihood of an impact, including the past occurrences and known hazards of asteroids. Scientists estimate that Earth is hit by a small asteroid every year, and a large impact could occur every few hundred thousand years. While these infrequent events may seem insignificant, the damage caused by even a small asteroid can be catastrophic.

The episode then delves into the potential methods of deflecting or destroying an asteroid. One option is to use a spacecraft to divert the asteroid's trajectory by applying a gentle but constant force, such as a gravity tractor or a kinetic impactor. Another option is to use nuclear weapons to obliterate the asteroid, although this method carries its own risks and challenges. Other solutions include using solar sails or orbiting space mirrors to redirect sunlight towards the asteroid, or even employing asteroid mining techniques to extract its resources and reshape its trajectory.

The show also explores the various complexities of asteroid deflection, such as the time required to plan and execute a mission, the precision required for targeting and timing, and the potential risks of failure. The episode emphasizes the importance of ongoing research and development in asteroid studies and space technology, as well as international cooperation and preparation.

PBS Space Time also presents the political and ethical implications of asteroid deflection, including the need for international regulations and frameworks for asteroid mitigation and the potential misuse of asteroid mining for military purposes. The episode also highlights the human impact of an asteroid impact and the need for public awareness and education about the dangers and possibilities of asteroids.

Overall, Challenge: Can You Save Earth from a Killer Asteroid? is a thought-provoking and informative exploration of one of the most pressing scientific and existential challenges facing humanity. The show highlights the importance of ingenuity, collaboration, and foresight in tackling this challenge and emphasizes the need for ongoing research and preparation to safeguard our planet and our future.