A nebula ('cloud' or 'fog' in Latin; pl. nebulae, nebulæ or nebulas) is a distinct luminescent part of interstellar medium, which can consist of ionized, neutral or molecular hydrogen and also cosmic dust.Nebulae are often star-forming regions, such as in the "Pillars of Creation" in the Eagle Nebula.In these regions, the formations of gas, dust, and other materials "clump" together to …

El sistema solar [1] es el sistema planetario que liga gravitacionalmente a un conjunto de objetos astronómicos que giran directa o indirectamente en una órbita alrededor de una única estrella conocida con el nombre de Sol. [2] La estrella concentra el 99,86 % de la masa del sistema solar, [3] [4] [5] y la mayor parte de la masa restante se concentra en ocho planetas cuyas …

The Solar System is the gravitationally bound system of the Sun and the objects that orbit it. It formed 4.6 billion years ago from the gravitational collapse of a giant interstellar molecular cloud.The vast majority (99.86%) of the system's mass is in the Sun, with most of the remaining mass contained in the planet Jupiter.The four inner system planets—Mercury, Venus, Earth …

Formación inicial Nebulosa solar. La hipótesis actual sobre la formación del sistema solar es la hipótesis nebular, propuesta por primera vez por Emanuel Swedenborg. [1] En 1775 Immanuel Kant, quien estaba familiarizado con el trabajo de Swedenborg, desarrolló la teoría más ampliamente.Una teoría similar fue formulada independientemente por Pierre-Simon Laplace …

The Solar System is the Sun and all the objects that orbit around it. The Sun is orbited by planets, asteroids, comets and other things.. The Solar System is about 4.6 billion years old. It formed by gravity in a large molecular cloud.Most of this matter came together in the center, and the rest flattened into an orbiting disk that became the Solar System.It is thought that almost …

The Crab Nebula (catalogue designations M1, NGC 1952, Taurus A) is a supernova remnant and pulsar wind nebula in the constellation of Taurus.The common name comes from William Parsons, 3rd Earl of Rosse, who observed the object in 1842 using a 36-inch (91 cm) telescope and produced a drawing that looked somewhat like a crab. The nebula was discovered by …

In astronomy, metallicity is the abundance of elements present in an object that are heavier than hydrogen and helium.Most of the normal physical matter in the Universe is either hydrogen or helium, and astronomers use the word "metals" as a convenient short term for "all elements except hydrogen and helium".This word-use is distinct from the conventional chemical or …

The nebular hypothesis is the most widely accepted model in the field of cosmogony to explain the formation and evolution of the Solar System (as well as other planetary systems).It suggests the Solar System is formed from gas and dust orbiting the Sun.The theory was developed by Immanuel Kant and published in his Universal Natural History and Theory of the Heavens …

The core of the Sun is considered to extend from the center to about 0.2 to 0.25 of solar radius (140,000 - 170,000 kilometres (86,000 - 110,000 miles)). It is the hottest part of the Sun and of the Solar System.It has a density of 150 g/cm 3 at the center, and a temperature of 15 million kelvins (15 million degrees Celsius, 27 million degrees Fahrenheit).

History of discovery. The first gamma ray source to be discovered was the radioactive decay process called gamma decay.In this type of decay, an excited nucleus emits a gamma ray almost immediately upon formation. Paul Villard, a French chemist and physicist, discovered gamma radiation in 1900, while studying radiation emitted from radium.Villard knew that his described …