作者：MANUEL CONESA RODRÍGUEZ 3 年以前
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The Solar System is the gravitationally bound system of the Sun and the objects that orbit it, either directly or indirectly. Of the objects that orbit the Sun directly, the largest are the eight planets, with the remainder being smaller objects, the dwarf planets, and small Solar System bodies.
Saturn is known most for its rings.
Galileo Galilei first thought it was an object with three parts: a planet and two large moons on either side.
Not knowing he was seeing a planet with rings, the stumped astronomer entered a small drawing — a symbol with one large circle and two smaller ones — in his notebook.
The rings are made of ice and rock and scientists are not yet sure how they formed. The gaseous planet is mostly hydrogen and helium.
Uranus is an oddball. It has clouds made of hydrogen sulfide, the same chemical that makes rotten eggs smell so foul.
It rotates from east to west like Venus. Its tilt causes extreme seasons that last 20-plus years, and the sun beats down on one pole or the other for 84 Earth-years at a time.
Methane in the atmosphere gives Uranus its blue-green tint. It also has 13 sets of faint rings.
Neptune is about the size of Uranus and is known for supersonic strong winds.
Neptune is far out and cold.
The planet is more than 30 times as far from the sun as Earth.
Neptune was the first planet predicted to exist by using math, before it was visually detected. Neptune is about 17 times as massive as Earth and has a rocky core.
It was once considered a planet but in August 2006 the International Astronomical Union (IAU) downgraded the status of Pluto to that of “dwarf planet.”
Pluto is unlike other planets in many respects. It is smaller than Earth's moon; its orbit is highly elliptical.
It's a cold, rocky world with a tenuous atmosphere. Pluto is a very active ice world that's covered in glaciers, mountains of ice water, icy dunes, and possibly even cryovolcanoes that erupt icy lava made of water, methane or ammonia.
Redes sociales...
Búsqueda de empleo
Administración electrónica (DNI electrónico)
Formación a distancia
Pie de página
Contenidos
Menú de navegación
Marca o logotipo
Encabezamiento
Earth is a water world, with two-thirds of the planet covered by oceans.
It's the only world known to harbor life.
Earth's atmosphere is rich in nitrogen and oxygen.
Its name originates from 'Die Erde,' the German word for 'the ground.'
Earth may once have had two moons, nowadays it has just one.
La URL no es más que la dirección electrónica para poder acceder a un recurso en un servidor remoto. El tipo más común de URL es el de las páginas web, con la dirección http://,
Funcionamiento
Primero, el protocolo TCP (Transmision Control Protocol) fragmenta los datos en paquetes de información. Después, estos paquetes son enviados a la red, posiblemente sobre rutas diferentes, según el IP (el Protocolo de Internet), que se encarga de enrutarlos.
Para qué sirve
Sirve para establecer una comunicación entre dos puntos remotos mediante el envío de información en paquetes (tecnología de conmutación de paquetes).
Por eso cada vez se habla más del Internet de las cosas, interconexión de objetos cotidianos (alrmas, lavadoras, persianas...) con internet
Roberts acabó escribiendo el primer programa de utilidad de correo electrónico para relacionar, leer selectivamente, almacenar, reenviar y responder a mensajes.
Confeccionó su plan para ARPANET organizando demostraciones y aplicando los conmutadores de paquetes llamados interface message processors (IMPs)
En un primer expermiento se conectaron dos ordenadores (California-Massachusetts), demostrando así la validez de la idea
A planet's day is the time it takes the planet to rotate or spin once on its axis.
Write down the Earth's day in hours.
How long does it take for Earth to go around the sun?
Our Solar System has eight “official” planets which orbit the Sun.
Each planet is at a different distance from the sun. Name its position.
Venus is Earth's twin in size and has no moons.
Its surface has various mountains and volcanoes. Because of its thick, toxic atmosphere that's made of sulfuric acid clouds, Venus is an extreme example of the greenhouse effect. The average temperature on Venus' surface is 900 F (465 C).
Venus spins slowly from east to west, the opposite direction to most of the other planets.
The Greeks believed Venus was two different objects — one in the morning sky and another in the evening. Because it is often brighter than any other object in the sky, Venus has generated many UFO reports.
A planet's day is the time it takes the planet to rotate or spin once on its axis.
Write down Venus's day measured in Earth days.
NEWS (Network News Tranfer Protocol)
SMTP (Simple Mail Transfer Procol)
HTTP (HyperText Transfer Protocol o Protocolo de Transferencia de Hipertextos)
Es el utilizado por los servidores de World Wide Web
FTP (File Transfer Protocol o Protocolo de transferencia de archivos)
TCP/IP. Transmision Control Protocol/Internet Protocol
Provee
Otras opciones...
Tiempo de Vida de Paquetes
Direccionamiento
Fragmentación
Tipo de Servicio
