Mysterious interstellar object spotted

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Mysterious interstellar object

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third interstellar object

MailOnline

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Science

Key piece of evidence shows interstellar object is an alien spacecraft

Summary

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3I/ATLAS was first spotted by astronomers on July 1 by NASA 's Asteroid Terrestrial -impact Last Alert System.

The interstellar object is currently around 300 million miles ( 490 million km ) from Earth .

Astronomers say it is up to 200 times larger than the 100-metre-long and extremely thin ' Oumuamua ' But Harvard University theoretical physicist Avi Loeb says it is too big to be natural.

He says the chances of it reaching our sun are incredibly low.

3I/ATLAS appears to be much smaller and much more reflective than any asteroid.

This would be possible if the object is a comet, a ball of ice and dust which moves very quickly through space.

This is the accepted answer among most astronomers and space agencies.

However, Professor Loeb says that this is the 'simplest and most likely' solution.

He doesn't think that the evidence for the comet theory is conclusive.

But he says it's still too early to rule out the possibility that it is a solid object.

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