7.1

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azi

Cards (19)

Bolide 
Any extraterrestrial object
Bolide impact events 
Happen less frequently compared to other natural disasters
Pose one of the largest, if not greatest, threats to the existence of the human race
Bolide impact events are the least likely natural disaster to occur
Impact crater 
Depression shaped by factors like size, velocity, and angle of approach of asteroid, comet, or meteoroid impacts
Impact crater formation 
1. Earth's surface is severely compressed and deformed
2. Rock fragments (ejecta) are hurled into the atmosphere and fall back to the ground
Deadly impacts from celestial bodies are not uncommon
Small, uncommon impacts of extraterrestrial objects are rare
Micrometeorites, ranging from 50 micrometers to 2 mm in diameter, frequently hit Earth
Micrometeorites make up most extraterrestrial material reaching Earth's surface, producing tons of deposits daily
Most micrometeorites do not burn upon entering Earth's atmosphere
Slightly larger micrometeorites, 2-3 cm in size, become heated due to friction and melt or vaporize, displaying light, such as shooting stars
Asteroids
Large, stony or metallic chunks in the asteroid belt between Mars and Jupiter that orbit the Sun
Collisions or gravitational pull from the Sun or other planets cause asteroids to cross Earth's path
Impact events
Pose a significant risk, with chances of death ranging from 1 in 3,000 to 1 in 1,250
NASA is actively identifying and tracking near-Earth Objects (NEOs), comets and asteroids posing a significant threat
As of 2011, 911 + 17 out of 981 + 19 NEOs larger than 1 km wide have been identified
A program called Near-Earth Object Human Space Flight Accessible Targets Study (NHATS) was initiated in 2010 to identify NEOs for future human space flight missions
Understanding NEOs' physical characteristics and paths is crucial for predicting their proximity to Earth
Preparation for NEOs
1. Initiating a space mission
2. Preparing supplies for affected populations
3. Evacuating the affected area