A #new #analysis of #Hubble #data has clinched it: There's too #much #light in the #space around the #SolarSystem.

Not much extra light, to be sure. Just a subtle, ghostly glow, a faint excess that can't be accounted for in a census of all the light-emitting objects.

All the stars and galaxies surrounding the #Solar #System – and zodiacal light, aka dust on the Solar System's plane – none of these can explain what astronomers are now calling "ghost light".

After analyzing 200,000 Hubble #images and taking thousands of measurements in a project called #SKYSURF, an international collaboration is sure the #excess light is real.

And, moreover, they can't quite account for it. There are possibilities, but none of them have been confirmed. Not yet, anyway....