[longshadow]

Hint -- the mass of such extra firmamento fluid is sufficient to cause the redshift of distant stars.

Presumeably, if we were to send a probe out there to collect a sample of this fluid, it would be referred to as a ......

...... extra firmamento memento!!!!!

[PatrickHenry]

Presumeably, if we were to send a probe out there ...

Can't be done. First, the probe must get past Uranus, which as all can see, is so huge that it engulfs everything.