The birth of stars

The majority of entities in the Cosmos experience their own life cycle. Indeed, stars are no exception to this rule. They, too, come into existence and eventually perish, much like other celestial bodies. However, the trajectory of a star’s life, which encompasses the successive transformations it undergoes, is incredibly lengthy. Below, we shall exclusively examine…

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What is dark matter in the cosmos?

Dark matter is a type of matter that does not participate in electromagnetic interactions, meaning it does not emit or reflect light. It is a fundamental component of the Universe and exerts gravitational forces that influence the motion of stars within galaxies, including our own. Approximately 22% of all matter in the universe is believed…

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Size of celestial bodies

Experience the interactive scale of the Universe online: explore the actual dimensions of the universe, compare space objects, planets, stars, clusters, galaxies. When we talk about dimensions, we often refer to alternate realities or our perception of the world around us. However, there’s much more to dimensions than meets the eye. And perhaps the most…

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What causes stars to twinkle

Light and color Stars do not twinkle themselves. This is the impression received by an observer on Earth when they perceive the light of a star after it has passed through the atmosphere. This is a necessary condition for twinkling. If a very distant star is observed from space, it will not twinkle. Astronauts who…

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What is the velocity of gravity?

Gravitational speed refers to the rate at which gravitational influences, perturbations, and waves propagate. In quantum theories of gravity, the velocity of gravity is understood as the speed at which gravitons, the smallest particles (quanta) of the gravitational field, travel. Gravitational speed within physical theories Within Newton’s theory of gravitation, the speed of gravity is…

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What constitutes the universe

When we observe the edges of the visible cosmos, we are effectively peering into the past. Since it took 13.7 billion years for light to travel to us, we are witnessing the universe as it existed 13.7 billion years ago, rather than its present state. The entire universe is likely infinite in size. While this…

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Who Resides on Mercury

The concept of establishing colonies on Mars has been a topic of discussion for quite some time now, with actual progress being made towards this goal. After all, the Red Planet is relatively proximate to Earth and bears some resemblance to our home planet. However, when it comes to Mercury, the situation is entirely different….

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Ways to calculate the zenith angle

Zenith is the position on the celestial sphere that is situated directly above the observer’s position. Another way to define it is as a direction that points straight up from a specific location. In other words, it is one of two vertical directions that are perpendicular to the horizontal plane at the observer’s point. The…

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The Composition of the Universe

The arrangement of matter on a large scale refers to how matter is distributed in space on a scale larger than 1 Mpc. The way the universe is structured on a large scale is believed to reflect the overall evolution of the universe. There are two methods for studying the large-scale structure: Direct measurements of…

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