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Asteroid Kamo'oalewa - a Hawaiian term that means "the oscillating fragment", is a Ferris-wheel-size - between 120 and 300 feet wide, rock chunk that orbits within 14.4 million kilometres of Earth every April.
NASA's OSIRIS-REx mission to return asteroid Bennu sample to Earth nears completion while collision threat looms.
Asteroids are rocky fragments left over from the formation of the solar system about 4.6 billion years ago.
The DART mission is set to crash on an asteroid in a few days, but before it reaches its destination, it has used Jupiter as a practice target.
The asteroid approaching Earth is nearly 210 meters in size, bigger than the Statue of Unity, which is 192 meters.