25mm eye piece vs 10mm eyepiece??

Could someone explain something to me, I'm pretty clueless when it
comes to telescopes and eyepieces? I have a Celestron 114mm telescope
with two eyepieces, a 25mm SMA 1 1/4" and a 10mm SMA 1 1/4". They are
what came with it. Why is it, things are larger with the 10mm than
with the 25mm?

Also, I tried to look at Mars the other night and all I saw was an
orange dot (Iowa, USA 11:30pm 8/23/03). What can I expect to be able
to see with a 114mm telescope. Can I buy an eye piece that will allow
me to see more detail, or is my telescope just too small?

Thanks.



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