If you surfed the web this morning, you may have seen news of the latest existential threat to humanity: a “planet killer” asteroid named 2022 AP7.
Asteroids threatening Earth could be spotted by network of spacecraft near Venus' orbit, Chinese scientists say
That said, we'd have to find it well in advance. Potentially hazardous asteroids are much larger than Dimorphos, so a bigger collision would be required with plenty of lead time. That’s because the glare we see while observing from Earth is caused by Earth's atmosphere. But in space there's no atmosphere to look through.
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