Strange light spots on stripped oak table..

[Jdubs]

I'm restoring/refinishing an old oak refectory table, I've strip all the dark lacquer off and the sanded down to the bare wood but I'm left with a few strange light spots, is this the natural colour f be oak, what I should be hoping to achieve across the whole piece or is it something else?

Pic here: http://instagr.am/p/U8vHQ-I7uy/

Thanks

 

[big-all]

are you referring to the different coloured planks or the scratch lines crossing the planks
or something else

 

[Jdubs]

Wrong pic : http://instagr.am/p/U8k__Co7m-/

 

[foxhole]

Looks like remains of water damage , try ironing with a cloth or tissue over the top.Keep iron moving to avoid scorching.

 

[Harbourwoodwork]

It could be time to get brutal with a 4" belt sander Fox is right the wood has swelled making high spots ,which are cleaned of first ,hence the cleaner finish on the water marks,this is the true colour