Germans taking Moskow? He he.
Moscow - city is10 times bigger then Stalingrad.
Axis eastern army suffered more than 734,000 casualties (about 23% of its average strength of 3,200,000 troops) during the first five months of the invasion(that is more then during 2 years of war on the West), and on 27 November 1941, General Eduard Wagner, the Quartermaster General of the German Army, reported, "We are at the end of our resources in both personnel and materiel. We are about to be confronted with the dangers of deep winter."
And by the end of November Soviets put Siberian resevs in.
I belive if Barbarossa did start 2 weeks earlier and Germans would let themself be lured in street fighting in Moscow - axis defeat in Battle fo Moscow would've been even more devastating.

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Handle every stressful situation like a dog.
If you can't eat it or hump it.
Piss on it and walk away