shahkar jalal

Joined October 2025

163 stories

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Does the Universe Have an Edge?
What Do We Mean by the “Edge” of the Universe? In everyday terms, an edge means a boundary—like the edge of a table or the shore of an ocean. But applying this idea to the universe is not straightforward.
By shahkar jalal6 days ago in Education
Is the Universe Infinite or Finite?
Understanding the Observable Universe The observable universe is the region of space from which light has had time to reach Earth since the Big Bang, about 13.8 billion years ago.
By shahkar jalal6 days ago in Education
What Existed Before the Big Bang?
Understanding the Big Bang Theory The Big Bang is often misunderstood as an explosion that occurred at a point in space. In reality, it was an expansion of space itself.
By shahkar jalal6 days ago in Education
What Caused the Big Bang?
Understanding the Big Bang Theory The Big Bang does not describe an explosion in space. Instead, it describes an expansion of space itself. At the beginning, all matter, energy, space, and time were compressed into an extremely small, hot, and dense state.
By shahkar jalal6 days ago in Education
Is Dark Matter Proof of New Physics?
What Is Dark Matter? Dark matter is a form of matter that does not interact with electromagnetic radiation. This means it cannot be seen with telescopes that detect light, radio waves, X-rays, or infrared radiation.
By shahkar jalal7 days ago in Education
Could Dark Matter Interact With Itself?
What Is Dark Matter? Dark matter is a form of matter that does not emit, absorb, or reflect light. Because it is invisible, astronomers cannot observe it directly through telescopes. Its presence is inferred from its gravitational influence on visible matter.
By shahkar jalal7 days ago in Education
Will Dark Energy Tear the Universe Apart? Exploring the Fate of the Cosmos
The Discovery of Accelerating Expansion In 1998, astronomers studying distant supernovae made a shocking discovery: • The universe is expanding faster over time
By shahkar jalal7 days ago in Education
Is Dark Matter Connected to Black Holes? Exploring One of the Universe’s Deepest Mysteries
Understanding the Two Mysteries What Is Dark Matter? Dark matter is an invisible form of matter that: • Does not emit or absorb light
By shahkar jalal7 days ago in Education
Is Dark Energy a Property of Empty Space? Exploring the Vacuum of the Universe
What Do We Mean by “Empty Space”? At first glance, empty space seems simple — a region containing nothing. But modern physics tells a very different story.
By shahkar jalal8 days ago in Education
What Is Dark Energy and Why Is It Accelerating the Universe?
This discovery shocked scientists in the late 1990s and overturned everything we thought we knew about cosmic evolution. Gravity, which should slow expansion, appeared to be losing the battle. Some mysterious force was pushing the universe apart.
By shahkar jalal8 days ago in Education
How Does Dark Matter Shape Galaxies? The Invisible Architect of the Cosmos
What Is Dark Matter? Dark matter is a form of matter that: • Does not emit or absorb light • Does not interact electromagnetically
By shahkar jalal8 days ago in Education
Why Can’t We See Dark Matter? The Invisible Substance Shaping the Universe
What Does It Mean to “See” Something? To understand why dark matter is invisible, we must first understand what “seeing” actually means.
By shahkar jalal8 days ago in Education