- 4168 - EARLIEST GALAXIES - make astronomers rethink evolution? Galaxies from the early universe are more like our own Milky Way than previously thought, flipping the entire narrative of how scientists think about structure formation in the universe.
4168 - EARLIEST GALAXIES - make astronomers rethink evolution?
- Astronomers are finding an abundance of
Milky Way–like galaxies in the early universe, rewriting cosmic evolution
theories
-
- Using the James
Webb Space Telescope (JWST), astronomers have discovered that galaxies like our
own Milky Way dominate throughout the universe and are surprisingly common.
These galaxies go far back in the universe's history with many of these
galaxies forming 10 billion years ago or longer.
-
- The Milky Way is a
typical disk galaxy, which has a shape similar to a pancake or compact disk,
rotating about its center and often containing spiral arms. These galaxies are
thought to be the most common in the nearby universe and might be the types of
galaxies where life can develop given the nature of their formation history.
-
- However,
astronomers previously considered that these types of galaxies were too fragile
to exist in the early universe when galaxy mergers were more common, destroying
what we thought was their delicate shapes.
-
- The new discovery
finds that these disk galaxies are 10 times more common than what astronomers
believed. Using the Hubble Space
Telescope they thought that disk galaxies were almost non-existent until the
universe was about 6 billion years old, these new JWST results push the time
these Milky Way–like galaxies form to almost the beginning of the universe.
-
- The research
completely overturns the existing understanding of how scientists think our universe
evolves, and the scientists say new ideas need to be considered.
-
- Previously,
astronomers using the Hubble Space Telescope believed that galaxies had mostly
irregular and peculiar structures that resemble mergers. However, the superior abilities
of JWST now allows us to see the true structure of these galaxies for the first
time.
-
- This implies that
most stars exist and form within these galaxies which is changing our complete
understanding of how galaxy formation occurs. These results also suggest
important questions about dark matter in the early universe which we know very
little about.
-
- Based on our
results astronomers must rethink our understanding of the formation of the
first galaxies and how galaxy evolution occurred over the past 10 billion
years.
-
-
- September 26, 2023 EARLIEST
GALAXIES - rethink evolution? 4168
------------------------------------------------------------------------------------------
-------- Comments
appreciated and Pass it on to whomever is interested. ---
--- Some reviews are
at: -------------- http://jdetrick.blogspot.com -----
-- email feedback,
corrections, request for copies or Index of all reviews
--- to: ------
jamesdetrick@comcast.net
------ “Jim Detrick” -----------
--------------------- ---
Tuesday, September 26, 2023 ---------------------------------
No comments:
Post a Comment