The Asteroid Threat | National Geographic

TL;DR

Small telescopes in the space guard survey can now detect smaller asteroids approaching Earth, providing a few days or weeks of warning to evacuate and potentially save countless lives.

Transcript

Clark Chapman is a space scientist at the Southwest Research Institute he believes that after TC3 we should be looking at the whole asteroid threat differently for the last decade or or more my colleagues and I have been worried about asteroids larger than 1 kilometer in diameter we just didn't think that these small telescopes uh in the space guar... Read More

Key Insights

• 🛩️ Small telescopes in the space guard survey can detect smaller asteroids approaching Earth, providing a few days or weeks of warning for evacuation.
• 😤 Emergency management teams should treat the asteroid threat like any other impending disaster and prepare accordingly.
• 🛟 Evacuation and advanced planning can potentially save thousands or even millions of lives from asteroid impacts.
• 🪠 The death plunge, where telescopes observe asteroids on their final plunge to Earth, is a new concept in asteroid detection.
• 🪹 Warning the population and emptying the streets in preparation for an asteroid impact should be a priority for emergency management.
• 👨‍🦳 The potential devastation caused by a 30 m asteroid hitting a city like San Francisco highlights the importance of preparedness.
• 🕵️ The ability to detect and warn about smaller asteroids represents a significant advancement in asteroid threat mitigation.

Questions & Answers

Q: What has changed in how space telescopes can detect asteroids?

In the past, space telescopes were only able to detect asteroids larger than 1 kilometer in diameter. However, recent advancements have shown that smaller telescopes in the space guard survey can now spot smaller asteroids as they approach Earth.

Q: How much warning can we expect for smaller asteroids approaching Earth?

With the current technology, we may only receive a few days or perhaps a week of warning for smaller asteroids. This limited timeframe necessitates prompt evacuation and emergency preparations to ensure the safety of the population.

Q: What would be the potential impact of a 30 m asteroid hitting San Francisco?

If a 30 m asteroid were to impact San Francisco, it would result in devastating consequences. It would wipe out everything north of Market Street, including bridges and buildings. The population would need to evacuate the city to avoid the catastrophic effects.

Q: How does the experience of TC3 inform our approach to the asteroid threat?

The experience with TC3, a small asteroid that impacted Earth in 2008, has shown that there is an excellent chance of providing days or weeks of warning for small asteroids. This allows for effective evacuation plans and potentially saving countless lives.

Summary & Key Takeaways

• Small telescopes in the space guard survey can now detect smaller asteroids, providing days or weeks of warning before they approach Earth.

• Emergency management teams should prepare and treat an asteroid threat like any other impending disaster.

• With advanced planning and evacuation, thousands or even millions of lives could be saved from potential asteroid impacts.