we finally finish filling up our own periodic table and then new atoms "alien" show up.
gotta catch them all I guess?

seriously though, I wonder how these atoms are different from our atoms? different ratios of protons and neutrons?

Appears to be some confusion. Not new elements. Just unexpected ratios of known elements.
Watching the vid helps.

Edit: for those who can't watch. Heliosphere pushes against galactic wind, composed of hydrogen, helium, neon, and oxygen ions. Some galactic wind particles get through to a satellite. The ratio of the different elements is different than expected.

What I gathered from the video is that only neutral atoms can penetrate the heliopause, these would be stable atoms, of oxygen like 99.8% of our oxygen, or 16O, 8 electrons for 8 protons. I believe this implies that unstable isotopes of oxygen are kept out, but the space around our solar system has much less oxygen. They imply alien space, or I speculatively say, our solar system is a stable oxygen hoard.

I don't believe the links got into details of what they mean by different atoms because they never mention unstable isotopes, only imply.

Oxygen isotopes range from 3 stable; 16O, 17O, and 18O, 2 unstable; 13O and 15O, and 14 radioisotopes, with very short half lifes. But I couldn't find any isotope references (isotopics ), even with Neon, the only other element really used as a comparison. I don't fully understand all of the dynamics that cause isotopes of elements, (I thought chemical, energy, or heat) perhaps it is the ratio of the amount of oxygen to neon that is stealing the electrons from oxygen, making 13O to decay to nitrogen13, but they didn't talk about any of this!