Cassini’s astronomical charts were meant to be used to predict the precise positions and eclipse times of Jupiter’s four largest moons (the Galilean satellites : Io, Europa, Ganymede, and Callisto). More precisely...
Category - Astronomy
In the year 1671, the director of the Paris Observatory, Italian-French mathematician & astronomer “Giovanni Domenico Cassini” argued to the “French Royal Academy of Sciences” that the longitude of...
The postulates of “The Special Relativity of Gravity,” proposed by Albert Einstein in 1905, were mainly based on numerous observations regarding the measurement of the speed of light since the 17th century. The very 1st...
All stars in the universe move through phases in their Stellar Evolution as stars are born, become stable & remain stable for about 90% of their life cycle & then eventually die. The subject term “Stellar...
The subject name H II means “ionized hydrogen”, meaning hydrogen without electrons. Within the universe, which spans different galaxies, there are regions inside nebulae where hydrogen gas atoms become ionized due to...
In part I of the subject topic, we studied that a star in its Red Giant phase with an inert helium core shrinks & heats up. Eventually, the core becomes degenerate with the free electrons detached from the helium atoms...
Astronomers categorised supernovae based on star size, star system, brightness of a supernova & also on what elements are detected in the light of the supernova explosion. The 1st category of supernova is caused when a...
Stars remain stars as long as the 2 opposing forces, which are “gravity” trying to collapse the star inward & “nuclear fusion” in the star’s core exerting an outward pressure, remain in balance...