News of Asteroid 2023 BU floating past planet Earth in January was a fleeting story in the global news cycle.

On top of that, we typically don't find out about asteroids floating super close to Earth until a few days before.

That could explain why more us didn't hear about a big space object coming this close.

Dr Sophie Calabretto talks to Cosmos Magazine journalist Jacinta Bowler about how we discovery asteroids, how big 2023 US is and whether or not it poses any threat.

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