shahkar jalal
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Exoplanets and Habitability: Exploring New Worlds
What Are Exoplanets? Exoplanets, or extrasolar planets, are planets found outside our solar system. Although the first confirmed exoplanets were discovered in 1992, the field has expanded rapidly thanks to advanced telescopes and detection technologies. Today, astronomers have cataloged more than 5,000 confirmed exoplanets, ranging from small rocky worlds to massive gas giants.
By shahkar jalal2 months ago in Education
Understanding the Difference Between Stars and Quasars
What Are Stars? Definition Stars are massive spheres of hot gases, mainly hydrogen and helium, that produce energy through nuclear fusion. This process releases light, heat, and other forms of radiation. Our Sun is a typical example of a main-sequence star.
By shahkar jalal2 months ago in Education
The Formation of Quasars: Understanding the Universe’s Brightest Giants
What Are Quasars? A quasar is an extremely bright, energetic region found at the center of some distant galaxies. Their extraordinary luminosity comes from a supermassive black hole feeding on surrounding gas, dust, and even entire stars. As this material spirals inward, it heats up and emits intense radiation—creating what we observe as a quasar.
By shahkar jalal2 months ago in Education
Exploring the Multiverse: A Journey Beyond Our Universe
What Is the Multiverse? The multiverse refers to the possibility that multiple universes exist beyond our own. These universes—often called “parallel universes,” “alternate realities,” or “bubble universes”—may differ in:
By shahkar jalal2 months ago in Education
Exploring the Universe: A Complete Overview of Our Cosmic Home
What Is the Universe? The universe refers to all of space and time, including every form of matter, energy, and radiation. It contains everything we can observe with telescopes and instruments, as well as things that remain invisible, such as dark matter and dark energy.
By shahkar jalal2 months ago in Education
Wormholes vs. Black Holes: Understanding the Key Differences
What Is a Black Hole? Definition A black hole is an extremely dense region in space where gravity is so strong that nothing—not even light—can escape. This boundary around it is called the event horizon, and anything that crosses it is permanently trapped.
By shahkar jalal2 months ago in Education
Understanding Black Holes: Definition, Formation, and Their Role in the Universe
What Is a Black Hole? A black hole is a region of space with gravity so intense that nothing—not even light—can escape its pull. Because they emit no light, black holes are invisible. Astronomers detect them by observing the effects they have on nearby stars, gas, and light.
By shahkar jalal2 months ago in Education
Understanding Galaxy Clusters: The Cosmic Neighborhoods of the Universe
What Are Galaxy Clusters? A galaxy cluster is a gravitationally bound collection of galaxies. These clusters can contain anywhere from a handful of galaxies to thousands packed into the same region of space. Because the galaxies are located so close together, clusters act as cosmic communities where interactions and transformations occur.
By shahkar jalal2 months ago in Education
The Formation of Planets: How Worlds Are Born in the Cosmos (universe)
How a Solar System Begins 1. The Birthplace: A Nebula Every solar system begins inside a nebula—a huge cloud of dust and gas left over from older stars. These clouds contain hydrogen, helium, and trace elements that will eventually become planets, moons, and even new stars.
By shahkar jalal2 months ago in Education
How Stars Form: A Stunning Journey From Cosmic Clouds to Brilliant Light
The Birthplace of Stars: Molecular Clouds Every star begins its life inside a massive region of gas and dust known as a molecular cloud or stellar nursery. These clouds are mostly made of hydrogen, along with helium and traces of heavier elements. Despite their size, they are extremely cold—often around −250°C (−420°F).
By shahkar jalal2 months ago in Education
