The agency is focused on identifying which passengers may have dangerous intentions rather than looking at objects that could be misused, he said.

NPR: TSA Stands By Plan To Allow Small Knives On Planes

To better predict the orbits of hazardous objects, this group is looking at the Yarkovsky effect, a force created when the asteroid absorbs sunlight and re-radiates it as heat.

CNN: So, about that asteroid near Earth ...

But those are also the farthest and faintest (because the finite speed of light means that to see objects when they were young means looking at things billions of light years away).

ECONOMIST: The truth is out there. Maybe

Looking at the screen is like peering through a window into a world where characters and objects have true depth.

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