Joined today? You account was opened five minutes before you posted this thread
Oh well, besides what's been said, there are many astronomical phenomena that could be added, as for the game:
- Asteroids with caves, big ones. Suitable for starport building, and paid in exploration.
- Planets with caves
Some other phenomena with examples:
- Globular Star Clusters (Hercules, ...)
- Contact Binary Stars (Algol, ...)
- Oblated High-Speed Rotation Stars (Regulus, Achenar, ...)
- Unstable, not rounded stars (Betelgeuse, ...)
- Hot Jupiters with atmosphere emission (51 Pegasi b, ...)
- Pulse Stars (Altair, Polaris, ... )
- Cataclysmic Stars (Swallowed by a nearby black hole, can't remember one now)
- Rogue Stars
- Hot accretion disks
- Gamma Rays Bursts
...
Take a look to some of my old videos in YouTube, there's a whole circus out there.
You know, the Earth is placed in a very quiet neighborhood, we've been lucky.