Space and the universe encompass the large-scale structure of reality, including galaxies, stars, planets, and the physical laws that govern their behavior. Modern cosmology seeks to explain how the universe formed, how it evolves, and what its ultimate fate may be. Observations from telescopes and space missions have revealed an expanding universe filled with extreme environments that challenge classical understanding.
Despite significant advances, many fundamental questions remain unresolved. The nature of dark matter, dark energy, and the true size of the universe are still not fully understood. Observational limits restrict what can be measured directly, leaving aspects of the universe inferred rather than observed.
The topics collected here examine established scientific explanations while acknowledging the uncertainties and constraints that continue to shape cosmological research.
Cosmic Structure and Scale
Cosmology examines the large-scale structure of the universe, including galaxies, clusters, and cosmic expansion. Observations across vast distances help scientists understand how matter is distributed and how the universe has evolved over time.
- Is the Universe Actually Infinite?
- What Happens When Two Galaxies Collide?
- Are There Planets Made Entirely of Water?
Extreme Cosmic Environments
Certain regions of the universe exhibit extreme conditions, including intense gravity, radiation, and density. These environments challenge classical physics and reveal the limits of existing models.
- What Is Inside a Black Hole According to Science?
- What Would Humans Experience Near a Neutron Star?
- Why Is Space Completely Silent?
Cosmic Motion and Stability
The stability of planetary systems and stars depends on precise balances between gravity, motion, and energy. Disruptions to these balances can produce dramatic consequences.
- What Would Happen If the Sun Suddenly Disappeared?
- What Happens If Earth Leaves Its Orbit?
- Can Time Exist Without Space?
Limits of Space and Travel
Physical laws impose constraints on movement, communication, and exploration across vast cosmic distances.
- Is Faster-Than-Light Travel Possible?
Although modern science explains many aspects of the universe, fundamental limitations remain. The topics collected here reflect current understanding while acknowledging the boundaries imposed by observation and theory.