Exploring the Enigmas of Dark Matter and Dark Energy

Mysterious Cosmic Components
Mysterious Cosmic Components
Dark matter and dark energy compose about 95% of the universe, yet they remain largely enigmatic. Dark matter exerts gravitational pull, whereas dark energy accelerates the universe's expansion, opposing gravity's pull.
Dark Matter's Indirect Evidence
Dark Matter's Indirect Evidence
Dark matter cannot be observed directly. Its existence is inferred from gravitational effects on visible matter, radiation, and the large-scale structure of the universe, including the rotation curves of galaxies and gravitational lensing.
Dark Energy's Accelerating Universe
Dark Energy's Accelerating Universe
Discovered through supernovae observations, dark energy's repulsive force is causing the universe's expansion to accelerate. This mysterious energy form constitutes about 68% of the universe and challenges our understanding of physics.
WIMPs and Axions
WIMPs and Axions
Weakly Interacting Massive Particles (WIMPs) and axions are hypothetical particles that could constitute dark matter. Experiments like the Large Underground Xenon (LUX) detector aim to capture these elusive particles.
Modified Gravity Theories
Modified Gravity Theories
Some scientists propose alternative theories to dark matter, such as Modified Newtonian Dynamics (MOND), suggesting new laws of gravity that negate the need for dark matter at galactic scales.
Cosmic Microwave Background
Cosmic Microwave Background
The Cosmic Microwave Background (CMB) radiation provides clues about dark matter and energy. Tiny temperature fluctuations in the CMB help map the early universe's composition and the influence of these dark components.
Future Observations and Theories
Future Observations and Theories
Upcoming telescopes like the Euclid spacecraft and the Vera C. Rubin Observatory are poised to shed light on dark matter and dark energy, potentially revolutionizing our cosmic understanding.
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What composes 95% of the universe?
Stars and planets
Dark matter and energy
Gases and dust