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     1  +1 2014 aug 23planet density chartData Table for Planets & Dwarf Planets - Windows to the UniverseDwarf Planets are listed in a separate table below. ... mean density (water=1), 5.43, 5.25, 5.52, 3.93, 1.33, 0.71, 1.24, 1.67. atmospheric ...
     1  ~ 2014 aug 19earth magnetic protectionHow Does the Earth's Magnetic Field Protect Us From Space Dangerous particles don't hit the Earth's surface because they are forced by the magnetic field to move around the Earth . Particles do enter at the funnels over ...
     1  ~ 2014 aug 16movimiento de los planetaMovimiento de los planetas - Ventanas al UniversoJohannes Kepler estudió a los planetas y el trabajo de su profesor, Tycho Brahe, y probó que esta teoría podría explicar los movimientos de planetas .
     1  ~ 2014 aug 01luna del sistema solarTabla de las Lunas en Nuestro Sistema Solar - Ventanas al UniversoA partir de Octubre del 2008, hay lunas conocidas orbitando a planetas de nuestro Sistema Solar . lunas orbitan a los planetas "grandes" ...
     1  ~ 2014 jul 28biomes of the oceanThe Ocean Biome - Windows to the UniverseThe ocean holds the largest of Earth's biomes . It covers 70% of the planet's surface. Life in the ocean is diverse. The smallest creatures that call ... ‎Table of Ocean Creatures - ‎Life in the Open Ocean - ‎Ocean - ‎The Ocean Biome
     2  ~ 2014 oct 03cinturon de fuegoCinturón de Fuego del Pacífico - Ventanas al UniversoEl diagrama muestra un hecho notable acerca de la superficie de la Tierra. Alrededor de la cuenca del Océano Pacífico hay muchos volcanes. Así mismo, la  ...
     2  ~ 2014 sep 23solar syte coloring pageA Solar System Coloring Book - Windows to the UniversePage 1. A Solar System . Coloring Book. Courtesy of the. Windows to the ... The Sun is a star at the center of our solar system . It gives off light and heat. The Sun ...
     2  ~ 2014 sep 19solar system coloring page
     2  ~ 2014 sep 15parallax shiftHow do astronomers measure the distance to stars? Is it accurate In order to calculate how far away a star is, astronomers use a method called parallax . Because of the Earth's revolution about the sun, near stars seem to shift  ...
     2  +99 2014 sep 13point of ruchase interior atmosphereEarth: Interior and Surface, Atmosphere , Ocean, Magnetosphere Explore our beautiful home planet, its atmosphere , climate, life and other features through the links in this section of Windows to the Universe.
     2  +5 2014 aug 15weathering win dowsWeathering (Destroying Rock!) - Windows to the UniverseOver time, rocks exposed at the Earth's surface wear away. This is called weathering . There is two types of weathering that break rocks apart.
     2  +99 2014 aug 09colledge and co formationsThe Co - Formation Theory - Windows to the UniverseThe co - formation theory explains the origin of the moon as an object which formed out of the .... College Students Study Earth From NASA's DC-8 Flying Lab.
     2  +1 2014 aug 04universe solar systemThe Solar System - Windows to the UniverseThe solar system is filled with a wide assortment of celestial bodies - the Sun itself, our eight planets, dwarf planets, moons, asteroids and comets. The Earth is  ...
     2  ~ 2014 aug 04solar system moonsTable of Moons in Solar System - Windows to the UniverseAs of October 2008, there are known natural moons orbiting planets in our Solar System . moons orbit the "full-size" planets (Mercury, Venus, ...
     2  +3 2014 jul 26organic sedimentary rockOrganic Sedimentary Rocks - Windows to the UniversePlant remains squashed deep underground over millions of years make an organic sedimentary rock called coal. Coal doesn't look like it is ...
     2  +2 2014 jul 25space weather activities kidsSpace Weather - Windows to the UniverseSpace Weather is the term scientists use to describe the ever changing ... Hands- on activities , longer term projects, and tricky problems to tickle your brain ...
     3  +80 2014 sep 29what is a lifeWhat Is Life ? - Windows to the UniverseEven though we all seem to know what is meant by saying something is "alive", it's not very easy to describe what " life " is. It's almost as hard as describing where  ...
     3  +44 2014 sep 22earths energy poemSolar Energy in Earth's Atmosphere - Windows to the UniversePreviously, we had assumed a simplified model of Earth ; one in which our planet had not atmosphere. This allowed us to examine the basic ...
     3  +5 2014 sep 21link rotation systemThe Moon's Orbit and Rotation - Windows to the UniverseNASA's Hubble Finds Supernova Star System Linked to Potential “Zombie Star” ... In other words, it takes the Moon the same amount of time to rotate around ...
     3  ~ 2014 sep 20make make mythMakemake , Rapa Nui God of Fertility and Creator of Humanity In South Pacific mythology , Makemake was the creator of humanity and the god of fertility. He was also the chief god of the bird-man cult.
     3  ~ 2014 sep 16makemake myth
     3  +2 2014 sep 12kelvinTemperature - Kelvin Scale - Windows to the UniverseKelvin Scale. The Kelvin temperature scale (K) was developed by Lord Kelvin in the mid 1800s. The zero point of this scale is equivalent to -273.15 °C on the ...
     3  +57 2014 sep 09southern crossCrux - The Southern Cross - Windows to the UniverseCrux - The Southern Cross . If you live in the Southern hemisphere, or if you are vacationing in someplace like Hawaii, you can see a small but beautiful ...
     3  +7 2014 aug 30describe oceaneco systemThe ocean is not the same everywhere. There are many different ecosystems within the ocean depending on conditions such as the water ...
     3  +2 2014 aug 22efectos del cambio climaticoEfectos del Cambio Climático Actual - Ventanas al UniversoPanel Intergubernamental de Cambio Climático (IPCC) ... Abajo enumeramos algunos efectos de cambio de clima que están ocurriendo ...
     3  +1 2014 aug 18manned space flightChronology of Manned Space Missions - Windows to the UniverseChronological listings of American and Soviet manned missions from 1961-1993. Includes dates, crew biographies, and mission highlights.
     3  ~ 2014 aug 17que es un tsunami¿ Qué es un Tsunami ? - Ventanas al UniversoUn tsunami (se pronuncia tsuu-NA-mii) es una serie de olas, que se generan en un océano u otros cuerpos de agua, a causa de terremoto ...
     3  -1 2014 aug 16layers of the atmosphereLayers of the Earth's Atmosphere - Windows to the UniverseThe Earth's atmosphere is divided into five layers : the troposphere, the stratosphere, the mesosphere, the thermosphere, and the exosphere. ‎The Troposphere - ‎The Stratosphere - ‎The Exosphere - ‎The Thermosphere
     3  ~ 2014 jul 30what is the stratosphereThe Stratosphere - Windows to the UniverseThe stratosphere is the second layer (going upward) of Earth's atmosphere. It is above the troposphere and below the mesosphere. The ozone ...
     3  +3 2014 jul 30to the windowWindows to the UniverseExplore the Earth and space sciences and related arts and humanities connections with Windows to the Universe! Earth, planets, moons, the Sun, and the stars. ‎Planets - ‎The Solar System - ‎Earth - ‎Earth's Atmosphere
     3  +8 2014 jul 27sea water depthDensity of Ocean Water - Windows to the UniverseThis is a simple density- depth ocean water profile. You can see ... Increasing salinity also increases the density of sea water . Less dense water ...
     3  +1 2014 jul 20fotos de nubesGalería de imágenes de nubes - Ventanas al UniversoEstas nubes altocúmulos se encuentran en las primeras etapas de ... Fotografías de nubes Nimbostratos, obtenidas en Victoria, BC, Canadá.
     3  +6 2014 jul 18types of elementsThe Periodic Table of the Elements - Windows to the UniverseEverything you see around you is made of tiny particles called atoms. There are many different types of atoms, each with a special combination ...
     4  +4 2014 oct 01truth about sun spotsSunspots - Windows to the UniverseThese are two pictures of different sunspots . The picture on the left shows the whole Sun with some large sunspot groups on it. The sunspot ...
     4  ~ 2014 oct 01stars and sunWhat are the main differences between the sun and other stars I guess the most important difference between our Sun and other stars is that the Sun is closer to Earth than any other star . The other possible differences are ...
     4  -1 2014 sep 28roman mars nasaMars , Roman God of War - Windows to the UniverseNASA Expands Commercial Space Program, Requests Proposals for Second ... Ares was the Greek god of war, was identified with the Roman god, Mars .
     4  +1 2014 sep 21stellar nursery factsHII Regions - Stellar Nurseries - Windows to the UniverseIt is their energy which makes the nebula glow. The Orion nebula is kind of circular in shape, and it glows with a characteristic red color. All stellar nurseries have ...
     4  -1 2014 sep 19the universeExplore the Earth and space sciences and related arts and humanities connections with Windows to the Universe ! Earth, planets, moons, the Sun, and the stars.
     4  ~ 2014 sep 16where comes from the pollutantsAir Pollution Sources - Windows to the UniverseAir pollution comes from many different sources. Natural processes that affect air quality include volcanoes, which produce sulfur, chlorine, and ...
     4  +2 2014 aug 24planets orbit timeData Table for Planets & Dwarf Planets : Size, Orbit , Temperature Negative values of rotation period indicate that the planet rotates in the direction opposite to that in which it orbits the Sun. This is called ...
     4  -1 2014 aug 23basic physic for kidsFundamental Physics - Windows to the UniversePhysics is the study of basic properties, materials, and forces in our Universe. Our new physics section will start off with some background ...
     4  +4 2014 aug 22cambio de clima imagenesGalería de imágenes y audio visuales del clima y cambio global Fotografía de extensiones de cirros, las cuales generalmente se suceden en buen clima . Estas se forman cuando caen copos de nueve y ...
     4  +3 2014 aug 22find gemini constellationConstellations : Gemini - Windows to the UniverseGemini is really easy to find . All you have to do is look for the two bright stars that make up the heads! They are called Castor and Pollux. Once you find the ...
     4  +1 2014 aug 08mythology family treeFamily Tree of Greek Gods and Goddesses - Windows to the UniverseA visual genealogy list of the Greek gods and goddesses.
     4  +5 2014 aug 06sun compared to earthThe Sun - how far? how big? - Windows to the UniverseThus the Earth - Sun distance varies by about 3%, or roughly 5 million km (3 million ... A comparison of the sizes of the Sun , Earth , and Jupiter.
     4  +1 2014 aug 04carnac from spaceThe Stones of Carnac - Windows to the UniverseThe stones of Carnac , France, are probably the most famous stones .... NASA's Fermi Space Telescope Reveals New Source of Gamma Rays.
     4  +2 2014 jul 30earth weather changesEarth's Climate and Global Change - Windows to the UniverseCheck out videos and lesson plans for key climate change indicators
     4  +4 2014 jul 29carbon cycle diagramThe Carbon Cycle - Windows to the UniverseThe Carbon Cycle moves carbon among the reservoirs in the Earth ... back down into the deeper regions of the Earth, as shown in this diagram .
     4  +10 2014 jul 28terremoto san franciscoEl gran terremoto de San Francisco de 1906 - Ventanas al UniversoA las 5:12 am. del miércoles 18 de abril de 1906, la mayoría de los habitantes en San Francisco , California, EE.UU. estaban dormidos.
     4  -1 2014 jul 26imagenes de la lunaArchivo de Imágenes de la Luna - Ventanas al UniversoImagen de la Luna , tomada por Star Tracker Cámara B en órbita Clementine # 110. ... Esta es una imagen a color de la Luna, usando tres filtros, tomada el 9 de  ...
     4  +10 2014 jul 19the carbon cycleThe Carbon Cycle GameClick to begin your journey! 0 ? 0. For teachers. Atmosphere. Credits. Surface. Ocean. Land Plants. Marine. Life. Soil. Deep Ocean. You visited: E X I T. out of 6  ...
     5  +4 2014 sep 30solar system picturesSolar System Image Archives - Windows to the UniverseThe Solar System Image Archives. Images of the Sun · Images of Mercury · Images of Venus · Images of Earth · Images of the Moon · Images of Mars · Images of ...
     5  -3 2014 sep 24chemical liquids common reactionsChemical Reactions - Windows to the UniverseNot all reactions will bubble and froth, and not all result in a yellow liquid . In general, a chemical reaction happens when different molecules interact causing a ...
     5  -3 2014 sep 23relative sizes of the planetsRelative Sizes of the Planets and the Sun - Windows to the UniverseAlthough the Sun looks small from Earth, it is really much, much bigger than our planet (and any other planet in the solar system). The Earth is ...
     5  ~ 2014 sep 22hardwork quotesMotivational and Inspirational Quotes about Hard Work , Curiosity Everyone needs some inspiration sometime! Here are some quotes that you may enjoy, or find useful in your work, play, or everyday life.
     5  -1 2014 sep 20عقربGreek Myth about Constellation Scorpius - Windows to the UniverseTo the ancient Greeks, the constellation Scorpius was the image of a scorpion . The constellation was related to the death of the hunter Orion. There are several  ...
     5  ~ 2014 sep 19tornado alley locationTornado Alley - Windows to the UniverseMost tornadoes in the United States form in an area called " Tornado Alley ". ... A radar echo shows up on a monitor and shows where the object is located .
     5  +3 2014 sep 17capas de la atmosferaCapas de la Atmósfera Terrestre - Ventanas al UniversoLa atmósfera se divide en cinco capas . La atmósfera de la Tierra es más densa cerca de la superficie y su densidad disminuye con la altura, ...
     5  ~ 2014 sep 16where pollutants comes from
     5  ~ 2014 sep 14haumeaHaumea - Windows to the UniverseHaumea is a dwarf planet in our Solar System. Haumea is officially the fifth dwarf planet. The four that came before it are Pluto, Eris, Ceres, and ...
     5  +35 2014 sep 13rayos xRadiación de rayos - X - Ventanas al UniversoImagen rayos - X del Sol obtenida por el telescopio de rayos - X blandos (SXT, por sus siglas en Inglés, Soft X-Ray Telescope) a bordo del ...
     5  -1 2014 sep 12tipos de tormentas electricasTormentas Eléctricas - Ventanas al UniversoLas tormentas eléctricas son uno de los tipos de fenómenos del tiempo más peligrosos y fascinantes. Más de 40 000 tormetas eléctricas ...
     5  ~ 2014 sep 01atmospheric temperature profileThe Average Temperature Profile of the Earth's AtmosphereThis image shows the average temperature profile through the Earth's atmosphere . Temperatures in the thermosphere are very sensitive to solar activity and can ...
     5  +2 2014 aug 26greek methology family try
     5  +2 2014 aug 23the big crunchThe Big Crunch - Windows to the UniverseIn this way the Universe would last forever but would continually go through these phases of expansion and contraction, Big Bang and Big Crunch and so on.
     5  -2 2014 aug 16draco the dragonDraco the Dragon in Greek Mythology - Windows to the UniverseDraco the dragon is famous throughout mythology. This great beast was especially present in greek myth. One of the more popular stories involves Heracles and ...
     5  ~ 2014 aug 14greek family tree
     5  ~ 2014 aug 10hard work quotesEveryone needs some inspiration sometime! Here are some quotes that you may enjoy, or find useful in your work , play, or everyday life.
     5  +1 2014 aug 09floating golf ballThe Floating Golf Ball - Windows to the UniverseThe Floating Golf Ball . An activity from Kim Giesting (Connersville, IN). Type of Lesson: Experiment/Discussion. Time Needed: 40 minutes ...
     5  -2 2014 aug 05evolution multimedia formationEvolution of Mercury's Interior, Early Formation in Inner Solar System Mercury, like the other planets, is believed to have formed in the earliest stage of the evolution of the solar system as dust came together to form even larger ...
     5  +8 2014 jul 17eye of stormThe Eye of a Hurricane - Windows to the UniverseCross section through a hurricane showing the locations of the eye , eyewall, ... Air from above the storm sinks down in the center of the eye .
     5  +11 2014 jul 16types of ecosystemsBiomes and Ecosystems - Windows to the UniverseSometimes ecosystems get out of balance. If, for example, it rains a lot and a type of bird that thrives with extra water increases in numbers, ...
     5  +17 2014 jul 16north magnetic poleEarth's Magnetic Poles - Windows to the UniverseOf course, there isn't really a huge bar magnet inside of Earth! Notice how Earth's North Magnetic Pole is actually the south pole of the magnetic ...
     6  -1 2014 sep 24magma chamberMagma Chamber - Windows to the UniverseWhen magma is erupted onto the surface in the form of lava, it becomes silicate rock. On subsequent eruptions of the volcano, magma leaves the chamber  ...
     6  +12 2014 sep 23motion of the oceanMotions of the Ocean - Windows to the UniverseSunrise over the Atlantic Ocean ... The Motions of the Ocean Word Search ... Water swirls around ocean basins in surface ocean currents.
     6  +14 2014 sep 22آدرس شفتThe Doppler Effect - Windows to the UniverseNew study suggests coral reefs may be able to adapt to moderate climate change ... A train whistle is an everyday example of a Doppler shift .
     6  +1 2014 sep 21makemakeMakemake - Windows to the UniverseMakemake is a dwarf planet in our Solar System. Makemake was discovered in March 2005 by a team of astronomers led by Mike Brown.
     6  ~ 2014 sep 20atmosferaAtmósfera de la Tierra - Ventanas al UniversoLa atmósfera es una mezcla de nitrógeno (78%), oxígeno (21%), y otros gases (1 %) que rodea la Tierra. Alto sobre el planeta, la atmósfera se va haciendo más ...
     6  +2 2014 sep 20soho observatorySOHO Mission Page - Windows to the UniverseThe SOHO mission is one way we are working to find the the answers. The Solar and Heliospheric Observatory is a byproduct of the European Space Agency ...
     6  -2 2014 sep 17carbon neutralWhat is " Carbon Neutral "? - Windows to the UniverseEvery time we travel or turn on our computers, we add greenhouse gases to the atmosphere. This is because most of the energy we use comes ...
     6  +6 2014 sep 14edge of the universeWhat is at the edge of the universe ? - Windows to the UniverseToo bad it's not a brick wall or something like that. Actually, there really is no " edge" of the universe so we can't go past it. There are two cases that could happen.
     6  -1 2014 sep 06quotes about hard work
     6  +2 2014 sep 05galaxiesGalaxies - Windows to the UniverseDuring the early 1900's, which is not very long ago, astronomers were unaware that there were other galaxies outside our own Milky Way Galaxy . When they ...
     6  ~ 2014 sep 02temperature inside a starFusion Inside the Stars - Windows to the UniverseFusion in the core of stars is reached when the density and temperature are high ... By detecting these neutrinos, scientists learn about fusion inside the stars .
     6  -1 2014 aug 26live in spaceHow do Astronauts Live in Space ? - Windows to the UniverseAlmost everyone has a question or two about living in space . What do astronauts do in space ? How do they do everyday things like eat, sleep and go to the ...
     6  +2 2014 aug 24greek mythology family treeIn Greek mythology , Apollo was the son of Jupiter(in Greek Zeus) and Leto ( Letona). He was the god of the Sun, logic, and reason, and was also a fine musician ...
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