Instant Genius From asteroids to aliens - how space is threatening our planet
Sep 25, 2025
Dr. Ryan French, a solar physicist and author of "Space Hazards: Asteroids, solar flares, and cosmic threats," discusses the various dangers our planet faces from space. He reveals the real risks posed by asteroids, emphasizing near-Earth objects as the most significant threats. Ryan explains the impact of solar flares and their effects on technology, offering insights into how they disrupt satellites and power grids. He also reassures listeners about humanity's growing ability to monitor and prepare for potential space hazards.
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We Can Nudge Asteroid Orbits
- Kinetic impactor tests like NASA's DART proved we can slightly change an asteroid's orbit by deliberate collision.
- Such demonstrations are first steps toward future redirection capabilities for hazardous asteroids.
Thousands Of Near-Earth Objects Tracked
- Over 30,000 near-Earth objects are tracked today, focusing on bodies whose orbits pass close to Earth.
- Cataloguing these NEOs is central to planetary defence efforts.
Magnetism Powers Solar Eruptions
- The Sun's magnetic field drives constant changes and releases energy as solar flares and CMEs.
- These eruptions convert magnetic energy into light and high-energy particles that affect Earth.
