{"id":7262,"date":"2014-06-13T19:19:57","date_gmt":"2014-06-13T16:19:57","guid":{"rendered":"https:\/\/uni-mag.gr\/te-einai-exoplanetas\/"},"modified":"2023-12-16T11:52:18","modified_gmt":"2023-12-16T09:52:18","slug":"te-einai-exoplanetas","status":"publish","type":"post","link":"https:\/\/www.uni-mag.gr\/es\/te-einai-exoplanetas\/","title":{"rendered":"\u00bfTE EINAI? Exoplanetas"},"content":{"rendered":"\n

EXOPLANETAS (O PLANETAS EXTRASOLARES)<\/strong><\/h3>\n\n

Un planeta extrasolar o exoplaneta es cualquier planeta que no pertenece a nuestro propio sistema solar. Un exoplaneta no orbita alrededor del Sol<\/a>, sino de otra estrella.<\/p>\n\n

En 1992 se descubrieron los primeros planetas de este tipo orbitando alrededor de un p\u00falsar. <\/p>\n\n

En 1995, se encontraron los primeros exoplanetas alrededor de una estrella ordinaria como el Sol (51 Pegaso), por Michel Major y Didier Keloz, que ganaron el Premio Nobel de F\u00edsica 2019 por su descubrimiento.<\/p>\n\n

En mayo de 2022 se anunci\u00f3 que se hab\u00edan encontrado unos 5.000 planetas extrasolares. Esta cifra no deja de crecer.<\/p>\n\n

\"\"
Nuestro sistema solar. A la derecha de la foto est\u00e1 el Sol. Puedes ver los 8 planetas. El sat\u00e9lite de la Tierra (la Luna) tambi\u00e9n es visible. Los 8 planetas de nuestro sistema solar son: Mercurio, Venus, Tierra, Marte, J\u00fapiter, Saturno, Urano y Neptuno. Algunos de los sat\u00e9lites de los planetas est\u00e1n marcados. Por el momento (2022), se han bautizado 53 sat\u00e9lites de J\u00fapiter. La foto muestra s\u00f3lo los cuatro m\u00e1s importantes<\/em><\/figcaption><\/figure>\n
\"\"
Representaci\u00f3n art\u00edstica de una estrella amarilla con sus aproximadamente 6 planetas. Hasta 2022, esta observaci\u00f3n directa no era posible.<\/em><\/figcaption><\/figure>\n

FORMAS DE DETECCI\u00d3N<\/h3>\n\n

La forma en que se detectan los exoplanetas suele ser indirecta. Es decir, medimos el efecto que la existencia de uno o varios planetas tiene sobre la estrella alrededor de la cual orbitan. Las formas habituales son las siguientes:<\/p>\n\n

1- La existencia de planetas alrededor de una estrella reduce el brillo de su estrella. Esta disminuci\u00f3n s\u00f3lo se produce cuando el planeta atraviesa el espacio entre la estrella anfitriona y la Tierra. <\/p>\n\n

2- La existencia de planetas hace que la estrella anfitriona se desplace ligeramente de forma radial debido a la atracci\u00f3n gravitatoria. Por ejemplo, la existencia de la Tierra hace que el Sol se desplace unos 500 kil\u00f3metros.<\/p>\n\n

3- Existen otros m\u00e9todos para detectar exoplanetas. Su eficacia es cuestionable y depende del sistema que se observe. <\/p>\n\n

El esfuerzo por detectar exoplanetas se intensifica principalmente porque queremos ver si hay vida exoplanetaria. Queremos saber qu\u00e9 forma adopta y cu\u00e1les son las condiciones propicias para su desarrollo.<\/p>\n","protected":false},"excerpt":{"rendered":"

Un planeta extrasolar o exoplaneta es cualquier planeta que no pertenece a nuestro propio sistema solar. […]<\/p>\n

Read More<\/a><\/p>\n","protected":false},"author":2,"featured_media":8964,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[772,769,770],"tags":[862,863],"class_list":["post-7262","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-que-es","category-issues-es","category-issue-01-es","tag-exoplanetas","tag-planetas-extrasolares"],"yoast_head":"\n\u00bfTE EINAI? 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