Ask Ethan: How far is the edge of the Universe from the farthest galaxy? (Synopsis) [Starts With A Bang]
“Despite its name, the big bang theory is not really a theory of a bang at all. It is really only a theory of the aftermath of a bang.” -Alan Guth
When we look to the deepest reaches of space, we can look for the “first” of any type of object. The first galaxy, the first star, the first light from the CMB, or even the first signals from the Big Bang, like gravitational waves. Yet these signals all have very different redshifts from one another, and perhaps more puzzlingly, lie at extraordinarily different cosmic distances from us.
Looking towards the north pole of the Milky Way galaxy, we can see out into the depths of space. What’s mapped in this image are hundreds of thousands of galaxies, where each pixel in the image is a unique galaxy. Image credit: SDSS-III.
The reason for this is the intricate relationship between the expansion of the Universe and the contents of what’s in it, and how that changes over time. When the Universe was hotter and denser in the past, it was also expanding much faster. It expanded so much faster in the past that looking back to the edge of the observable Universe (when the big bang occurred) versus looking to the cosmic microwave background (380,000 years later) corresponds to a 900 million light year difference today!
The light we perceive as the cosmic microwave background is actually leftover photons from the Big Bang, released at the instant they last scattered off of free electrons. Although that light travels for 13.8 billion years before reaching us, the expansion of space causes that location to be, at present, 45.2 billion light years away. Image credit: E.M. Huff, the SDSS-III team and the Sout Pole Telescope Team; graphic by Zosia Rostomian.
Source: http://scienceblogs.com/startswithabang/2017/05/06/ask-ethan-how-far-is-the-edge-of-the-universe-from-the-farthest-galaxy-synopsis/
Anyone can join.
Anyone can contribute.
Anyone can become informed about their world.
"United We Stand" Click Here To Create Your Personal Citizen Journalist Account Today, Be Sure To Invite Your Friends.
Please Help Support BeforeitsNews by trying our Natural Health Products below!
Order by Phone at 888-809-8385 or online at https://mitocopper.com M - F 9am to 5pm EST
Order by Phone at 866-388-7003 or online at https://www.herbanomic.com M - F 9am to 5pm EST
Order by Phone at 866-388-7003 or online at https://www.herbanomics.com M - F 9am to 5pm EST
Humic & Fulvic Trace Minerals Complex - Nature's most important supplement! Vivid Dreams again!
HNEX HydroNano EXtracellular Water - Improve immune system health and reduce inflammation.
Ultimate Clinical Potency Curcumin - Natural pain relief, reduce inflammation and so much more.
MitoCopper - Bioavailable Copper destroys pathogens and gives you more energy. (See Blood Video)
Oxy Powder - Natural Colon Cleanser! Cleans out toxic buildup with oxygen!
Nascent Iodine - Promotes detoxification, mental focus and thyroid health.
Smart Meter Cover - Reduces Smart Meter radiation by 96%! (See Video).
| Online: | |
| Visits: | 1,599,217,403 |
| Stories: | 8,138,412 |
Whistler Blowers, Insiders
