The Battle of Stalingrad was the turning point of the war on the Eastern Front, but why did the Russians care about it so much? Shouldn't they have cared more about Moscow, their capital? Also, how did the Soviets win at Moscow if Stalingrad was more eastern than Moscow? Wouldn't that mean the Germans pushed through Moscow?
Aside from the propaganda value, the fall of Stalingrad would mean that the Germans would be able to cross the Volga, a great natural obstacle. If the Germans crossed it, it would be very difficult to push them behind it again.
The Soviets did care about Moscow, a lot. Enormous forces were raised to defend the capital, and it took great effort to stop Operation Typhoon.
The front line isn't a vertical line that moves back and forth as armies fight each other. The German formation attacking Moscow was Army Group Center. The formation attacking Stalingrad was Army Group South. While the front by Moscow was relatively stable, Army Group South managed a successful offensive in mid-1942, which took them all the way to Stalingrad.