Was the Big Bang Really an Explosion?
(Planet Today) The big-bang theory was first proposed by Georges Lemaître in 1927 sans its contemporary name, which was coined in the 1950s.
The common name has allowed for the beginnings of our universe to be too often depicted as a massive explosion similar to that of an epic supernova. But was our universe really formed in a cosmic fireworks show? Or was something else at work?
The “big bang” wasn’t a “bang” at all, at least not in the common definition. It didn’t explode in a scene of shrapnel and fire, and there was definitely no mushroom cloud.
The big-bang theory of the universe is derived from Albert Einstein’s general theory of relativity and the idea that the universe expanded from a miniscule dense collection of energy called a singularity. There was no bang, just a vast expansion of extremely condensed material.
So why describe the theory with such a misleading name? To mock it, perhaps. Sir Fred Hoyle snidely referred to the theory as the “big bang” with the intention of reducing it to absurdity, and it stuck.
Hoyle believed, contrary to the big-bang theory, that the universe itself did not have a beginning, rather the components inside it did. This is called the steady-state theory, which has decreased in popularity in light of the common acceptance of the big-bang theory.
If the universe didn’t explode into existence, where did it all come from? According to the theory, the universe—this includes all space, time, energy, etc.—was condensed into an extremely hot zero-volume entity of infinite density called a singularity.
In physics density is quantified by dividing mass by volume, meaning that the equation to determine the density of a singularity divides by zero. If that doesn’t hurt your brain, this will: Because all of space and time existed within the singularity, the singularity itself did not exist within space or time.
It cannot be represented and described mathematically, because the laws of physics that we know do not apply in the singularity.
The universe as we know it (or barely know it) is the result of this singularity expanding and cooling. Since the singularity itself was not in a location on the planes of space or time, there is no center of the universe; everything is expanding from everything else at an equal rate.
As for the origins of the singularity, or even what existed before it, scientists are just as befuddled as everyone else.
By Kate Lohnes
Alien space debris stuck in Earth’s orbit, researchers say
Recently, a group of experts from Harvard University, led by physics
professor Avi Loeb, announced the possible presence of alien space
debris in Earth’s orbit, reports the Daily Star.
space research expert Professor Loeb is confident that the discovery of
such “interstellar objects could help expand our knowledge of possible
alien civilizations and technologies. A team of scientists is conducting
research to confirm that some of the objects in our orbit may be
connected to other star systems.
During an interview with Live
Science, Professor Loeb explained that these objects could enter the
solar system from interstellar space, defying Jupiter’s gravitational
pull and occupying limited orbits around the sun.
Some of them may
have technological origins similar to the probes sent by mankind into
interstellar space, such as Voyager 1 and Voyager 2, Pioneer 10 and 11
and New Horizons.
despite these interesting assumptions, Professor Loeb did not specify
what specific objects he was talking about. In his research report, he
notes that there could be “a significant number” of potentially
detectable objects in Earth’s orbit.
To confirm their assumptions,
the team of scientists uses computer simulations and the Vera Rubin
Observatory (Chile) with a high-resolution camera of 3.2 billion pixels.
This will allow for regular observations of the Southern sky and the
possibility of detecting several captured objects about the size of a
It is assumed that these interstellar objects passed through the
boundaries of the solar system and may carry unique information about
other civilizations and their technologies. If we could confirm the
origin of these objects, the mysteries that open before us, this would
be a real breakthrough in space exploration.
expresses hope that the new research will not only help expand our
knowledge of extraterrestrial technologies, but may also lead to the
discovery of new alien civilizations . Answers to such questions can be
of global significance and influence our understanding of the place of
mankind in the Universe.
while there are still many questions and assumptions, the study by
Professor Loeb and his team opens a new chapter in space exploration.
Each new discovery can be the key to deciphering the mysteries of the
cosmos and the possibility of encountering alien life forms.
Betelgeuse is acting strange again
Betelgeuse, a red giant on the brink of death, continues to show
unusual behavior. After the Great Blackout, which occurred in late 2019
and early 2020, the star became unusually bright. It is now the seventh
brightest star in the sky, while it normally ranks tenth. This has led
to speculation that Betelgeuse is preparing to explode in a
spectacularly large supernova.
However, scientists believe it’s too early to tell, and it’s likely
that this behavior is due to ongoing fluctuations after the Great
Blackout of 2019, and the star will return to normal within a decade.
Betelgeuse is one of the most interesting stars in the sky. It is
about 700 light-years from Earth and is a red giant in the last stage of
its life. It is also an unusual star for a red giant because it was
previously a monster blue-white O-type star, the most massive class of
Betelgeuse has changed its spectral type because it has almost
exhausted its hydrogen reserves. It now burns helium into carbon and
oxygen and has expanded to a gigantic size: about 764 times the size of
the Sun and about 16.5 to 19 times its mass.
Eventually it will run out of fuel to burn, become a supernova, eject
its outer material, and its core will collapse into a neutron star.
Before the Great Blackout, Betelgeuse also had periodic fluctuations
in brightness. The longest of these cycles is about 5.9 years and the
other is 400 days. But it seems that the Great Blackout caused changes
in these oscillations.
A new paper by astrophysicist Morgan McLeod of the
Harvard-Smithsonian Center for Astrophysics has shown that the 400-day
cycle appears to have been halved. This pulsational cycle is probably
caused by expansion and contraction within the star. According to
simulations carried out by MacLeod and his colleagues, the convective
flow inside Betelgeuse may have risen and become material that separates
from the star.
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