Your Age on Other Worlds Want to melt those years away? Travel to an outer planet! <div class="js-required"><hr> This Page requires a Javascript capable browser <hr></div> Fill in your birthdate below in the space indicated. (Note you must enter the year as a 4-digit number!) The Days (And Years) Of Our Lives Looking at the numbers above, you'll immediately notice that you are different ages on the different planets. The earth is in motion. The top-like rotation of the earth on its axis is how we define the day. The revolution of the earth around the sun is how we define the year. We all learn in grade school that the planets move at differing rates around the sun. Why the huge differences in periods? Johannes Kepler Tycho Brahe Kepler briefly worked with the great Danish observational astronomer, Tycho Brahe. Here you see a planet in a very elliptical orbit. Kepler's third law is the one that interests us the most. Let's just solve for the period by taking the square root of both sides: Isaac Newton
A Cosmic Map of the Exoplanets [Interactive] Exoplanet hunters have been busy. Since 2011 astronomers have discovered, on average, about three exoplanets every week—a precious few of which lie in the “habitable zone,” where water could take liquid form. This chart maps the known cosmic neighborhood of 861 planets. Click on the options under "Select layout" to map the planets based on their location in the sky, or on their distance from the Sun. (Since the Kepler planet-hunting satellite aims at a single spot in the Northern Hemisphere, a huge group of planets can be found near the 18-hour mark.) Here we've separated the planets into four categories. Despite the apparent multitude of nearby planets, researchers have been able to find just a minuscule fraction of what’s out there. Graphics and interactive by Jan Willem Tulp (Sources: the Exoplanet Data Explorer at exoplanets.org; planetquest.jpl.nasa.gov; “The Exoplanet Orbit Database,” by J.
Solar System Scope Une « barrière » massive sépare le centre de la Voie lactée du rayonnement cosmique externe ⇧ [VIDÉO] Vous pourriez aussi aimer ce contenu partenaire (après la pub) La Voie lactée, notre galaxie, comprend 100 à 400 milliards d’étoiles et jusqu’à 300 milliards de planètes. L’espace entre ces étoiles, qui se fond dans le milieu intergalactique, est le « milieu interstellaire » : un mélange de gaz, de poussières et de rayons cosmiques. Ces rayonnements proviennent selon les cas du Soleil, de l’intérieur ou de l’extérieur de notre galaxie. Le rayonnement cosmique est principalement constitué de particules chargées (protons, noyaux d’hélium, antiprotons, électrons) et de particules neutres (rayons gamma, neutrinos et neutrons). Xiaoyuan Huang (de l’Académie chinoise des sciences) et ses collègues, ont constaté que si la densité des rayons cosmiques était relativement constante dans les zones situées en dehors du centre de la galaxie, elle chutait considérablement dans la zone moléculaire centrale, la zone la plus proche du centre de la Voie lactée. Un phénomène à éclaircir
The Planets Today : A live view of the solar system 'Diamond rain' falls on Saturn and Jupiter 14 October 2013Last updated at 07:04 ET By James Morgan Science reporter, BBC News Diamond rain could be "the most common precipitation in the Solar System" the authors say Diamonds big enough to be worn by Hollywood film stars could be raining down on Saturn and Jupiter, US scientists have calculated. New atmospheric data for the gas giants indicates that carbon is abundant in its dazzling crystal form, they say. Lightning storms turn methane into soot (carbon) which as it falls hardens into chunks of graphite and then diamond. These diamond "hail stones" eventually melt into a liquid sea in the planets' hot cores, they told a conference. Continue reading the main story “Start Quote People ask me - how can you really tell? End QuoteDr Kevin BainesUniversity of Wisconsin-Madison He added they would be of a size that the late film actress Elizabeth Taylor would have been "proud to wear". "The bottom line is that 1,000 tonnes of diamonds a year are being created on Saturn. Thunderstorm alleys
Stellarium Le courant de gaz de Magellan est 5 fois plus près de la Terre et entrera en collision plus vite Le courant de Magellan, c'est le nom que les astronomes donnent à un immense flux de gaz qui serpente autour de notre Galaxie, la Voie lactée. Et aujourd'hui, des chercheurs suggèrent que cette structure pourrait être bien plus proche de la Terre qu'ils ne l'avaient d'abord imaginé. Cela vous intéressera aussi [EN VIDÉO] Zoom sur les nuages de Magellan, avec le NOIRLab Les images du Survey of the MAgellanic Stellar History (SMASH) révèlent un portrait de famille saisissant de nos voisins galactiques : les grands et petits nuages de Magellan. © NOIRLab Dans son petit coin d'Univers, notre Galaxie n'est pas isolée. Ce courant, les chercheurs s'y intéressent parce qu'il cache quelques indices à la fois de l'évolution passée de la Voie lactée et de son avenir. Ainsi ce flux de gaz pourrait se trouver cinq fois plus près de nous que ce que les astronomes pensaient jusqu'alors. Inouï : Futura lance son tout premier Magazine papier ! Pour que cette aventure réussisse, Futura a besoin de vous.
Magnifying the Universe Embed this infographic on your site! <iframe width="500" height="323" scrolling="no" src=" frameborder="0" allowfullscreen></iframe><br />Copyright 2012. <a href=" the Universe</a> by <a href=" Sleuth</a>. The above is an interactive infographic. We have also developed a complimentary poster that you can view here: Sizes of the Universe poster. If you're technically inclined, here's a look at the references we used to construct these infographics: Facts About The Universe. Introduction: This interactive infographic from Number Sleuth accurately illustrates the scale of over 100 items within the observable universe ranging from galaxies to insects, nebulae and stars to molecules and atoms. While other sites have tried to magnify the universe, no one else has done so with real photographs and 3D renderings. How To Use: Credits:
Stunning New Photo Of Europa Shows Jupiter's Icy Moon Just As The Human Eye Would See It It's the most extraordinary image ever of Europa. NASA's newly "remastered" photo of Jupiter's icy moon (below) shows the satellite's geology in stunning, high-definition detail. And unlike a similar image released previously--in which the colors were artificially enhanced--the new photo shows Europa pretty much as the human eye would see it. (Story continues below image.) The color variations across the cracked surface indicate the surface geology. Blue and white areas contain relatively pure water ice. Europa, which was discovered by Galileo in 1610, is of special interest to astronomers because it's believed to have a deep subsurface ocean with conditions favorable for life. The image was made from images taken by NASA's Galileo space probe in the late 1990s.
Astronomy Welcome to the website of the Palomar Observatory. The Palomar Observatory is located in north San Diego County, California. It is a world-class center of astronomical research that is owned and operated by the California Institute of Technology. The Palomar Observatory is open to the public daily (except December 24 and 25) for daytime visits. Hale Telescope Web Cam Palomar Observatory All-sky Camera View