Looking for space games with planet exploration ( Train included )

Try GRAV?
Early Access right now, but who knows if you'll ever be able to customize your avatar.

No man sky... it is much better after the patch.

Oxygen not included (alpha)

Empyrion - Galactic Survival, also in Early Access, might be of interest to you?

I'm not sure if astroneer counts. Check it out.

Try the one that inspired them all : Elite, the videogame from 1984 (http://www.frontier.co.uk/games/elite/)
There has been a few sequels and many Elite-inspired games (like the Privateer series in the Wing Commander universe). Latest one of Elite serie is Elite Dangerous (http://store.steampowered.com/app/359320/Elite_Dangerous/)

Starbound maybe?

Can't add anything to the list, so have a bump.

Bump. Nice train

I don't have any game in mind other than the ones allready listed.
So I bump.

Crashlands is pretty good, probably more like Don't Starve, but you may like it. I didn't want to repeat games already mentioned

oxygen not included

Kerbal Space Program! It's not like any other game people mentioned above, but it's all about space, exploration and fun.

SPORE!) It's Classic.)

Astroneer

Space Engineers has added planets. And also Dual Universe.

Precursors

thanks for all the HOGS!

no real advice on the games, sorry!

bump and thanks, all good space games, that i know, were already mentioned, sorry

EverSpace - More focused on battle than exploration, looks good nonetheless.

Thank you for the train. All advices I had are mentioned above.

Starmade. Planets will be getting an overhaul soon. Demo is the full game until the end of alpha.

Space Rangers HD: A War Apart
http://store.steampowered.com/app/214730/Space_Rangers_HD_A_War_Apart/
(this is Space Rangers 2: Dominators with big addon wich includes pirate faction and additional planetary fights and text quests and more)
also there exists in the world previous games Space Rangers 1 and Space Rangers 2: Dominators =)

(Space travels with fantastic music, planetary fights, text quests on different planets, space trading and piracy)

very very shame for low metacritic score

maybe it looks very casual/arcade at screenshots but it totally deepest thing which you can play again and again because it mixing different gameplay genres RTS+RPG+text adventures+arcade