In 2017, astronomers in Maui spotted a mysterious object moving very fast around the sun. They observed it for two months before it disappeared out of sight. They think it came from another star far far away, outside the solar system. So they gave it a poetic Hawaiian name, ‘Oumuamua’, meaning messenger. Some even speculate it might be alien technology!
The likely truth is just as fascinating. A new theory proposes that Oumuamua is a piece of frozen nitrogen ice, originally from an exoplanet in orbit around its star, much like Pluto orbits our sun. A collision of planets ejected this chunk of the exoplanet out of its original solar system. It then spent the last half a billion years or so travelling through space, until it happened to visit our solar system and be spotted by earthlings in 2017.
Isn’t it amazing that from brief observations of a tiny fuzzy blob in telescopes, scientists can work backwards and deduce all these details? Science is fun. :) – LHL
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