The Cosmic Microwave Background (CMB) from our perspective The CMB defines the size of our observable universe, stretching ~46.5 billon light years across The Milky Way is .003 times as small as the glowing blue dot at the center, which itself is ~230 million light years acrosspic.twitter.com/f6jzgtBpm5
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Replying to @InertialObservr
It’s actually the radius of our observable universe that the cmb defines as ~46bn light years. So “across the universe” is more like 90 light years.https://astronomicca.com/2018/07/11/where-is-the-edge-of-the-universe/ …
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Replying to @astronomicca
Yes thanks I forgot to multiply by 2!
12:02 AM - 9 Dec 2019
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