Unraveling the Secrets of Dark Matter: A Cosmic Puzzle

Have you ever gazed at the night sky, wondering about the unseen forces that shape the universe? Scientists, armed with an arsenal of sophisticated observations and theoretical models, have delved into the mysterious realm of dark matter, a cosmic enigma constituting approximately 27% of the universe.

### Decoding the Composition

The cosmic recipe reads: ~68% dark energy, ~27% dark matter, and a mere ~5% normal matter. But what exactly is dark matter?

### Dark, Elusive, and Not Conventional

Dark matter is aptly named – it eludes our direct perception as it does not manifest in the form of stars or planets that grace our night skies. Observations vividly reveal that the visible matter we observe falls significantly short of constituting the observed 27%.

### Not Your Ordinary Matter

It's not shrouded in dark clouds of conventional matter, composed of baryons – particles that constitute protons and neutrons. If it were, we'd detect these clouds through their absorption of passing radiation. Dark matter's reluctance to engage with electromagnetic forces leaves it veiled from conventional detection methods.

### The Antimatter Mystery

Dark matter is not antimatter. If it were, we'd witness distinct gamma rays resulting from the annihilation of antimatter with matter. Yet, the cosmic stage remains void of these telltale signs.

### No Galactic Giants

Large galaxy-sized black holes, once considered contenders, are ruled out. Gravitational lensing, a consequence of concentrated matter bending light, fails to yield sufficient events to justify these celestial behemoths constituting the required 27% dark matter contribution.

### Unraveling the Unknown

The cosmic ballet, orchestrated by dark matter, unfolds in the spaces between galaxies, silently shaping the cosmos. While we've ruled out what dark matter is not, the true identity remains elusive, leaving scientists to navigate the cosmic seas with theories and observations as their compass.

In this grand cosmic puzzle, dark matter stands as an enigma, challenging our understanding of the universe's fabric. As we peer deeper into the cosmic abyss, the quest to unravel the mysteries of dark matter continues, promising revelations that may reshape our cosmic narrative.

Abell 2744: Pandora's Cluster Revealed

• A complex collision of at least four galaxy clusters is captured in this new image.
• Strange effects that have never been seen together before have apparently been produced because of this smash-up.
• This system has been dubbed "Pandora's Cluster" by astronomers because of all of the different structures found.
• Officially known as Abell 2744, this system is located about 3.5 billion light years from Earth.

Although the galaxies are bright, they make up less than 5% of the mass in Abell 2744. The rest is hot gas (around 20%) visible only in X-rays, and dark matter (around 75%), which is  completely invisible

Here are some interesting theories about dark matter which we will discuss in separate blog :

• Sterile neutrinos
• Self-interacting dark matter
• Dibarions
• Dark matter from primordial bubbles
• Primordial black holes
• Axions escaping from neutron stars
• Dark matter interacting via the fifth dimension

( when blog available on these topics you will able to click them to redirect)

In the cosmic symphony of mysteries, dark matter emerges as a silent conductor, orchestrating the dance between galaxies and shaping the very fabric of the universe. As we traverse the cosmic seas, ruled neither by visible stars nor dark antimatter, our compass is guided by theories and observations that continue to unveil the enigma of this elusive cosmic companion. The grand cosmic puzzle invites us to peer deeper into the abyss, challenging our perceptions and promising revelations that could reshape the narrative of our cosmic existence. And amidst this celestial exploration, the collision of galaxy clusters in Pandora's Cluster, Abell 2744, beckons us to witness the extraordinary effects of cosmic clashes, shedding light on the unseen forces that govern our vast cosmic tapestry. Join us on this interstellar journey, where the mysteries of dark matter and the cosmic ballet of colliding clusters invite us to ponder the unknown, awaiting the unveiling of secrets that may redefine our understanding of the cosmos.