What if you traveled to Proxima Centauri, the closest star to the Sun at the moment, and looked back in our direction? You would notice a slightly different constellation of Cassiopeia in the sky. The familiar W would have an extra leg, connecting to our Sun.
It would also be the brightest star in that constellation, outshining its companions with ease, at a magnitude of 0.4, five times brighter than the brightest star of Cassiopeia. Proxima Centauri is about 4.3 light years away. That distance is an equivalent of about 41,000,000,000,000 kilometers, give or take a few billion. Proxima Centauri is a red dwarf star in a wide triple star system, and has one known planet, somewhat bigger than Earth, and very close to the star. It orbits its mother star in about 11 days.
Below you can see a screenshot which gives you an impression of the Sun as seen from Proxima Centauri. It’s to the left of Cassiopeia, the W-shaped constellation. To the right and lower you can see M31, the Andromeda galaxy. It’s 500,000 times further away than Proxima.
And can you see the Earth? No you can’t. Even from the closest stars our planet is just an invisible pixel in the sky. And that’s all of us, combined.