Two galaxies aligned in a way where their gravity acts as a compound lens

It would be cool if we some day had special days of astronomy where every telescope is turned to galactic eclipses the way they once did for solar eclipses.

The sky is huge and we are moving, so surely some would happen in our lifetimes?

Surely any such eclipse lasts a long time. From the perspective of our lifetimes it is static.

Space is big. You just won't believe how vastly, hugely, mind-bogglingly big it is.

It takes light, the fastest thing that can be, 100,000 years to cross the Milky Way.

The Sagittarius Dwarf Spheroidal Galaxy is currently in the process of being consumed by the Milky Way and is expected to pass through it within the next 100 million years.

So, unless you're even more optimistic about life extension technology than I am, not in our lifetimes, no.

Isn't the idea to use the sun as a lense already enough? The main problem being the focal point at 500+ au.

> It takes light, the fastest thing that can be, 100,000 years to cross the Milky Way.

Relative to us. For the light itself it takes no time.

Our own frame of reference is the only one that matters, given the comment I'm replacing to.

The farther away they are the slower they would scan the sky behind them or go out of conjunction. So I guess one of the objects would have to be something relatively close.

Are we not talking about galaxies? No galaxy is "close".