What happened when the 3rd estate made the tennis court oath?

Essentially, the National Convention was formed. The third estate aroused the fear of the public, which led to mobs arming themselves. The bastille happens a little while after, and all the anger the third estate had was turn into a little device called a guillotine. Most nobels were killed and this led to the Reign of Terror led by Robbespiere.

the space race was a battle to make advanced technology to get to the moon and to get a better understanding of space.

well that depends on how deep the hole is. you'd first go through te crust of the earth, then the upper mantle, then the lower mantle then the outer core, then the inner cor then you'd be stuck in the core to melt.