A tiny asteroid safely buzzed by Earth this week. SUV-sized asteroid 2020 QG safely zoomed past at 1,830 miles (2,950 km) over the Indian Ocean, and we could see Earth's gravity bend its trajectory. More from @asteroidwatch: http://go.nasa.gov/2EbrtfY pic.twitter.com/lI6ED065wG
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How big does an asteroid od have to be to post a threat to humanity if fell on Earth?
Oh much bigger than 2020 QG. If this asteroid would've been on an impact trajectory, it'd likely have become a fireball as it broke up in Earth's atmosphere; happens several times a year. The majority of NEAs fly by safely at greater distances, usually much farther than the Moon.
