New computer simulations suggest the first magnetic fields that emerged after the Big Bang were much weaker than expected — containing the equivalent magnetic energy of a human brain.
Category: cosmology – Page 5
Inflation without an inflaton! This Model Challenges Big Bang Inflation
A new study suggests the universe didn’t need inflation to begin. Instead, gravitational waves could explain how structure formed in the early cosmos.
Paper link: https://journals.aps.org/prresearch/a…
Chapters:
00:00 Introduction.
00:40 The Discovery/Event.
02:42 Scientific Significance & Theories.
04:48 Implications and What’s Next.
07:16 Outro.
07:54 Enjoy.
MUSIC TITLE: Starlight Harmonies.
MUSIC LINK: https://pixabay.com/music/pulses-star…
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The cosmic giant challenging our understanding of galaxy formation in the early universe
Scientists have discovered a giant black hole that they believe may have been formed in the first few microseconds after the Big Bang. The black hole is so huge that it may change our understanding of how these cosmic giants form. If the findings are confirmed, this will be the first evidence of primordial black holes, which were predicted to exist by Stephen Hawking in the 1970s.
The discovery comes from observations made by the James Webb Space Telescope (JWST), the largest telescope in space. JWST spotted a group of small, red, faint objects called “Little Red Dots” (LRDs), which are thought to be baby galaxies that are home to young, growing black holes.
A paper by an international team of scientists led by astrophysicist Ignas Juodžbalis of the University of Cambridge in the UK has directly measured the mass of one of the LRDs. Their results indicate that a mysterious glow from the red dot named QSO1 is a black hole with a mass equivalent to 50 million suns. This large astronomical object is in the early stages of a process called accretion, where its gravity is pulling in surrounding gas and dust. The study is published on the arXiv preprint server.
Astronomers uncover enormous bubble bigger than our Solar System
A giant bubble of gas and dust surrounds the red supergiant DFK 52, likely created in a powerful outburst 4,000 years ago. Astronomers are baffled at how the star survived without going supernova, and suspect a hidden companion may have played a role. This discovery could reveal clues about the final stages of massive stars.
Astronomers from Chalmers University of Technology, Sweden, have discovered a vast and expanding bubble of gas and dust surrounding a red supergiant star – the largest structure of its kind ever seen in the Milky Way. The bubble, which contains as much mass as the Sun, was blown out in a mysterious stellar eruption around 4,000 years ago. Why the star survived such a powerful event is a puzzle, the scientists say.
The new results are published in the scientific journal Astronomy and Astrophysics, and the team was led by Mark Siebert, Chalmers, Sweden. Using the ALMA radio telescope in Chile, the researchers observed the star DFK 52 – a red supergiant similar to the well-known star Betelgeuse.
The unthinkable confirmed—James Webb and Hubble prove that the universe is expanding at two different speeds, throwing cosmology into crisis
Does it sound familiar to you the name James Webb? Maybe you’ve heard about it because it’s a very important telescope scientists use on its missions. Recently, this telescope and the Hubble have confirmed the universe is expanding in two different directions. I know it is difficult to believe, even scientists doubt it at first, but telescopes have proved it. So, let’s find out more about what the James Webb Space Telescope and the Hubble telescope have found.
To make this scientific explanation more visual, imagine you draw small dots on the surface of a deflated balloon and then you blow it up. What do you think will happen to the dots? Exactly! They will be far from each other because the balloon stretches.
So, this is what happens with the universe. Galaxies separate because space itself is expanding, and the speed this is occurring is called: the Hubble constant. You may not know this, but this is so important that it helps us know the age and destiny of the universe.