A S T R O L A B O . com | Yatoutskifo pour l'astro Detailed age map shows how Milky Way came together -- ScienceDaily Using colors to identify the approximate ages of more than 130,000 stars in the Milky Way's halo, Notre Dame astronomers have produced the clearest picture yet of how the galaxy formed more than 13.5 billion years ago. Astrophysicist Daniela Carollo, research assistant professor in the Department of Physics at the University of Notre Dame, and Timothy Beers, Notre Dame Chair of Astrophysics, along with research assistant professor Vinicius Placco and their colleagues published their findings in Nature Physics, including a chronographic (age) map that supports a hierarchical model of galaxy formation. That model, developed by theoreticians over the past few decades, suggests that the Milky Way formed by merging and accretion of small mini-halos containing stars and gas, and that the oldest of the Milky Way's stars are at the center of the galaxy and younger stars and galaxies merged with the Milky Way, drawn in by gravity over billions of years.
Exoplanet and Candidate Statitics On this page we have assembled statistics for various categories of confirmed exoplanets, TESS candidates, and Kepler candidates. The values here come from the Confirmed Planets and KOI Cumulative interactive tables; TESS Project Candidate counts are from ExoFOP-TESS. The Exoplanet Archive's collection of known exoplanets were discovered using a variety of methods, and many have been detected using multiple methods. The following tables show the number of planets contained within the Exoplanet Archive whose discovery can be attributed to a particular technique. Clicking on a link returns a pre-filtered interactive table for that particular data set. For a list of published, refereed papers that derive planet occurrence rates, please see our Planet Occurrence Rate Papers page. Summary Counts
7 Space Simulators That Let You Explore the Universe Why should Mars rovers have all the fun? If you're tired of standing by while Curiosity rolls around up there, it's time to head out on the open exosphere and explore the universe for yourself — digitally, of course. SEE ALSO: 10 Must-Follow Tumblrs for Science Lovers A handful of excellent space simulators use real astronomical data to re-create the known universe in three dimensions. Fly through the galaxy at ludicrous speeds, map out humanity's best hope for extrasolar colonization, or mess with physics to create your own cosmic recipes. Some of these simulations stick to our own solar system, while others push the boundaries of our cosmological projections, procedurally generating star systems far beyond our galactic neighborhood. If you take any of these for a spin, let us know in the comments where you traveled.
Exploriments: Weight, Mass and Force of Gravity - Effect of Altitude and Comparison across Multiple Planets on the App Store RV Planet Resources in the Exoplanet Archive This page describes the resources available in the Exoplanet Archive for planets discovered using the radial velocity (RV) technique. Technique Overview The radial velocity (RV) method (sometimes referred to as the "Doppler wobble" method) is an indirect method for detecting exoplanets which depends on measuring the small reflex motion of a star caused by an exoplanet companion as the two orbit their common center of gravity. Since the star is so much more massive than the planet, this reflex motion is very small, typically on the order of a few to hundreds of meters per second. Confirmed Planets Planets discovered via the transit method which meet the Archive's exoplanet criteria are included in the Confirmed Planets table. To see only the planets discovered by the RV method, enter radial velocity in the filter box under Discovery Method.Often planets will be followed up with RV observations after being discovered by alternate methods (e.g. the transit method). Contributed Data
No One Wants to Live in My 'Elysium'-Style Simulation Orbital Space Colony They will also be a pain in the ass to run. And I speak from experience on this because I briefly governed my own orbital colony. My time in command did not end well. Joe Strout gave me the opportunity to fail. Strout, who describes himself as “space nut,” was a childhood member of the L5 Society, an organization dedicated to advancing technology essential for building and launching orbital space colonies in the L5 orbit. Strout wasn’’t cool with that so he started programming. Part 1: Building your colony You start out by choosing whether or not to create something in low Earth orbit (which is better protected from radiation damage) or high Earth orbit (from which materials can be important from the moon for cheap). Deciding between LEO and HEO. This last part is important — because it can potentially throw your entire design into disarray. Gravity can be incredibly difficult to recreate in space. Oh — and all this also affects your budget. And that’s just the exterior. What a kingdom
Educational Resources « Astronomical Society A Sampling of Hands-On Astronomy Activities from the ASP Jump into hands-on astronomy with these classroom tested activities from a variety of ASP programs Surfing the Solar System Surf the web to find the answers to a fun solar system puzzle for the whole family K-12 Online Astronomy Activities Navigate the tangled web of activities on the internet with this annotated list, organized by subject Night Sky Network Astronomy Activities & Resources The Universe in the Classroom, a newsletter for teachers. Articles on Education from Mercury Magazine Hunt down some good ideas and resources in these archived articles from the “Education Newswire” and “Black Holes to Blackboards” departments of our membership magazine, Mercury. Other Articles on Education Selected Resource Guides Gather some great background reading from these annotated astronomical resource guides: Selected “Astronomy Beat” Columns Available to the Public Astronomy Education Review Looking for research in astronomy education?
Bulk Data Download The NASA Exoplanet Archive serves a variety of spectra, time series and other exoplanet-related data, and has generated a set of wget scripts to enable users to download these data in bulk. To use these scripts, you must have wget installed and included in your environment path before executing the scripts. For more information about installing and using wget, please read the wget help page. If you are looking for specific data sets for UKIRT, MOA, or SuperWASP, see their respective bulk data download pages: For best performance, do not run more than 4 wget scripts in parallel. Kepler Pipeline Scripts These reports were generated by the Kepler Team during the evaluation of TCEs and KOIs. Kepler Time Series Scripts Light curves were generated by the Kepler pipeline and are archived at MAST. Exoplanet Transit Survey Service Complete Data Sets A variety of other download scripts for SuperWASP data sets can be found here. Time Series Data
Astronomie & Astrophysique New analysis adds support for a subsurface ocean on Pluto: Findings suggest other large objects in the Kuiper belt may also have liquid oceans beneath frozen shells -- ScienceDaily A liquid ocean lying deep beneath Pluto's frozen surface is the best explanation for features revealed by NASA's New Horizons spacecraft, according to a new analysis. The idea that Pluto has a subsurface ocean is not new, but the study provides the most detailed investigation yet of its likely role in the evolution of key features such as the vast, low-lying plain known as Sputnik Planitia (formerly Sputnik Planum). Sputnik Planitia, which forms one side of the famous heart-shaped feature seen in the first New Horizons images, is suspiciously well aligned with Pluto's tidal axis. "It's a big, elliptical hole in the ground, so the extra weight must be hiding somewhere beneath the surface. Impact basin Like other large basins in the solar system, Sputnik Planitia was most likely created by the impact of a giant meteorite, which would have blasted away a huge amount of Pluto's icy crust. "At that point, there is no extra mass at Sputnik Planitia," Nimmo explained. Moon anomalies
HD 10180 Star in the constellation Hydrus HD 10180, also designated 2MASS J01375356-6030414,[8] is a Sun-like star in the southern constellation Hydrus that is notable for its large planetary system. Since its discovery, at least seven planets, and possibly as many as nine, have been observed orbiting it, making it potentially the largest of all known planetary systems, including the Solar System.[9][5] Other stars with a large known number of planets include Kepler-90, TRAPPIST-1, Kepler-11, and 55 Cancri. Characteristics[edit] Based upon parallax measurements, it is located at a distance of about 127 light-years (39 parsecs) from Earth.[10] The apparent visual magnitude of this star is 7.33, which is too faint to be viewed with the naked eye although it can be readily observed with a small telescope.[11] At a declination of −60°, this star cannot be seen at latitudes north of the tropics. Planetary system[edit] Animation of the planetary system Orbital arrangement[edit] Planets[edit] See also[edit]
Alternance jour-nuit et ensoleillement de la Terre L'animation permet de comprendre le phénomène des saisons. L'axe de rotation de la Terre n'étant pas perpendiculaire au plan de l'écliptique, selon la période de l'année, les rayons du Soleil n'arrivent pas de la même manière à la surface de la Terre : c'est le phénomène des saisons. Aux équinoxes, les rayons du Soleil sont parallèles au plan de l'équateur ; entre les équinoxes, ils sont au-dessus (printemps, été) ou en-dessous (automne, hiver), avec un angle maximum aux solstices : le soleil se positionne alors au-dessus d'un des tropiques (tropique du Cancer au solstice d'été, tropique du Capricorne au solstice d'hiver. La déclinaison solaire correspond à l'angle que font les rayons solaires avec le plan de l'équateur. La limite de l'ombre (un grand cercle de la Terre) oscille donc de part et d'autre de la position à l'équinoxe. Le petit soleil montre l'endroit de la Terre où le Soleil est au zénith à cet instant. Mode d'emploi Cliquer-glisser sur la sphère pour changer l'angle de vue.
Comments Ken Ledoux Not terrifying; awesome. What's terrifying is what we've done to earth. 32 · 4 hours ago Richard Clear Douglas Adams, Hitchhikers Guide to the Galaxy - Space is big. 2 · 2 hours ago Karen Magon Amazing more like and this is not including the speed of which everything is traveling and also does not include the time scales... Graham Sharman That photograph of Earth from 4 billion miles away doesn't mean Earth is insignificant, A man lives there that built the camera that took the photo. 1 · 1 hour ago Scott MacKenzie Just curious--early in the video, there is an image of "earth" from four billion miles away. Ali McGregor No...it's factual? Salah Eddine Mh So you can say we're just like on the head of a single sperm in a Maersk container loaded with cum?? 1 · 3 hours ago Marilyn Lewis If I may, Ken, I'd like to quote your first statement on my page...you nailed it!!!!! Dale Tousignant Why Yes, Yes it is terrifying... that somebody would even think that it is!