A Jovial Evening

[RiverNotch]

I remember my Galileo moment,
viewing Jupiter through a telescope.
A sphere, the sunlight on it's surface
gradually curving into deep shadows.
A pale red smudge around the middle
and surrounding it four bright moons.
"It's half a billion miles away", I said,
showing you.
And you said,
"Huh, those five dots?"
As my axis shifted and sent me spinning
in a mercurial orbit towards the pub.

Wait a minute....Juno?

Also, "the sunlight on its surface"