I have found 3 available asteroids: one starting, one by teleporter, and one by telescope. No other asteroids are visible. It seems I have explored the entire universe.
1. There should be more available asteroids to visit.
2. Even the empty space should be possible to map. It should not stay covered by fog of war.
Also discovered while taking these screenshots: the starmap doesn't zoom out very far. Its farthest zoomed-out position is exactly where I would expect its farthest zoomed-in position to be. It should zoom out farther.
1. Explore the entire universe using telescopes.