So much there which is no longer there and so much new that cannot yet be seen!
That is emphatically true. Looking at galaxies billions of light years away, what we are seeing is what the galaxy looked liked billions of years ago when the light we only get to see now has finally arrived within our sight. Looking at the stars, galaxies, we are actuallly looking into the distant past, due to the limitations on the speed of light already the fastest in the universe at 186,000 miles per second. It’s just that the distances that encompass space is that much more daunting. Do you remember the pillars of creation caught by the Hubble Telescope, a stellar nursery for star creation? Those objects were light years long and wide. Recently,scientists made a startling announcement, that the pillars of creation as we saw them through Hubble had already vanished. It’s just the speed of light revealing the structures having vanished having to travel the vast distances until it reaches us won’t arrive for centuries. Boggles the mind.