Video Experimental Relacionado
Updated: May 31, 2026
09:44
Laboratory Drop Towers for the Experimental Simulation of Dust-aggregate Collisions in the Early Solar System
Published on: June 5, 2014
La historia cósmica de la formación de estrellas
1Institute for Astronomy, University of Edinburgh, Royal Observatory, Edinburgh, UK. jsd@roe.ac.uk
Science (New York, N.Y.)
|July 9, 2011
Resumen
Los astrónomos mapearon la formación de estrellas a través de la historia cósmica utilizando la astronomía observacional. Esta investigación explora la evolución del universo desde el inicio del Big Bang hasta nuestros días.
Área de la Ciencia:
- Historia cósmica de la historia cósmica.
- La astronomía observacional es la astronomía de las observaciones.
- Evolución de la galaxia Evolución de la galaxia.
Sus antecedentes:
- Los recientes avances en astronomía observacional han remodelado significativamente nuestra comprensión de la evolución del universo.
- El universo primitivo era caliente y liso, en contraste con la compleja estructura de estrellas y galaxias de hoy.
Objetivo del estudio:
- Para describir el mapeo de la formación estelar a lo largo del tiempo cósmico.
- Investigar la evolución desde el universo primitivo hasta nuestros días.
Principales métodos:
- Utilizando una variedad de técnicas de observación complementarias.
- Empujando las fronteras de observación a aproximadamente 500 millones de años después del Big Bang.
Principales resultados:
- Mapa detallado de la subida y caída de la formación estelar en el 95% del tiempo cósmico.
- Comprender la transición desde el universo primitivo a la estructura cósmica actual.
Conclusiones:
- La astronomía observacional ha proporcionado profundos conocimientos sobre la historia cósmica.
- La evolución del universo de un estado temprano suave a una estructura compleja ahora se entiende mejor.
Videos de Conceptos Relacionados
01:31Formation of Species
Speciation describes the formation of one or more new species from one or sometimes multiple original species. The resulting species are discrete from the parent species, and barriers to reproduction will typically exist. There are two primary mechanisms, speciation with and without geographic isolation—allopatric and sympatric speciation, respectively.
02:35What is Evolutionary History?
Scientists record evolutionary history by analyzing fossil, morphological, and genetic data. The fossil record documents the history of life on Earth and provides evidence for evolution. However, both fossil and living organisms offer evidence that outlines Earth’s evolutionary history.
01:10Detection of Black Holes
Although black holes were theoretically postulated in the 1920s, they remained outside the domain of observational astronomy until the 1970s.
Their closest cousins are neutron stars, which are composed almost entirely of neutrons packed against each other, making them extremely dense. A neutron star has the same mass as the Sun but its diameter is only a few kilometers. Therefore, the escape velocity from their surface is close to the speed of light.
Not until the 1960s, when the first neutron...
Their closest cousins are neutron stars, which are composed almost entirely of neutrons packed against each other, making them extremely dense. A neutron star has the same mass as the Sun but its diameter is only a few kilometers. Therefore, the escape velocity from their surface is close to the speed of light.
Not until the 1960s, when the first neutron...
02:06Conditions on Early Earth
Around 4 billion years ago, oceans began to condense on earth while volcanic eruptions released nitrogen, carbon dioxide, methane, ammonia, and hydrogen into the primordial atmosphere. However, organisms with the characteristics of life were not initially present on earth. Scientists have used experimentation to determine how organisms evolved that could grow, reproduce, and maintain an internal environment.
02:06Conditions on Early Earth
Around 4 billion years ago, oceans began to condense on earth while volcanic eruptions released nitrogen, carbon dioxide, methane, ammonia, and hydrogen into the primordial atmosphere. However, organisms with the characteristics of life were not initially present on earth. Scientists have used experimentation to determine how organisms evolved that could grow, reproduce, and maintain an internal environment.
01:17The Principle of Superposition and the Gravitational Field
The principle of superposition applies to gravitational forces of objects that are sufficiently far apart. It states that the net gravitational force on a point object is the vector sum of the gravitational forces on it due to various objects. The principle helps calculate the force by listing the individual forces and then vectorially summing them up. However, it should be noted that the principle of superposition is not always apparent. In the presence of a second force, the first force could...