Why is the Boötes void empty?
Boötes is not quite empty: it turns out to contain a sprinkling of galaxies arranged in a tubular shape. This could be the remains of the shared edge of two smaller voids before they combined. Another possibility is that our existing theory of the big bang will have to be modified to accommodate Boötes’s existence.
Why is Boötes void so big?
Making peace with the vacuum. The problem was that the Boötes void was just too big. Voids grow because their dense edges have a much stronger gravitational pull than anything at their centres. But the universe wasn’t yet old enough to have inflated such a big bubble.
What is bigger than the Boötes void?
Voids designated by their constellation
The Hercules Supercluster thus forms part of the near edge of the Boötes Void. Discovered in 1975, along with the Coma Supercluster, it lies in front of the Coma Cluster. It was the first void to be discovered and is approximately 1/3 as far away as the much larger Boötes Void.
- Why is the Boötes void empty?
- Why is Boötes void so big?
- What is bigger than the Boötes void?
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