This week, NASA rolled a big archive of hisÂtorÂiÂcal images into Flickr ComÂmons, givÂing users access to more than a half cenÂtuÂry of NASA’s phoÂtoÂgraphÂic hisÂtoÂry. The images are dividÂed into three neat sets – “Launch and TakeÂoff,” “BuildÂing NASA” and “CenÂter NameÂsakes” – and they’re all copyÂright-free, meanÂing that you can share and use these images howÂevÂer you like. You can jump into the archive here and watch it grow over time. Thanks for the heads up @eugenephoto! They’re always appreÂciÂatÂed…
20 years ago (April 24, 1990) the HubÂble Space TeleÂscope was launched, beginÂning a long periÂod of disÂcovÂery. Today, NASA is celÂeÂbratÂing the HubÂble’s 20th anniverÂsary by releasÂing one of the many brilÂliant phoÂtos takÂen by the space teleÂscope. The image shows us a small porÂtion of one of the largest star-birth regions in the galaxy, the CariÂna NebÂuÂla. As NASA goes on to describe it:
“TowÂers of cool hydroÂgen laced with dust rise from the wall of the nebÂuÂla. The scene is remÂiÂnisÂcent of HubÂble’s clasÂsic “PilÂlars of CreÂation” phoÂto from 1995, but is even more strikÂing in appearÂance. The image capÂtures the top of a three-light-year-tall pilÂlar of gas and dust that is being eatÂen away by the brilÂliant light from nearÂby bright stars. The pilÂlar is also being pushed apart from withÂin, as infant stars buried inside it fire off jets of gas that can be seen streamÂing from towÂerÂing peaks like arrows sailÂing through the air.”
This humÂbling footage of the Milky Way was filmed on MauÂna Kea in Hawaii, the same locaÂtion that recentÂly gave us footage of stars orbitÂing a black hole. This is, of course, not a coinÂciÂdence. MauÂna Kea hosts the world’s largest obserÂvaÂtoÂry for optiÂcal, infrared, and subÂmilÂlimeÂter astronÂoÂmy. Thanks Robert for sendÂing this our way.
Above, we bring you what astroÂphysiÂcist Daniel Holz calls “one of the coolest movies in all of sciÂence.” What you see here is not exactÂly straightÂforÂward. But it’s the work of UCLA astronomer Andrea Ghez, and it essenÂtialÂly shows stars orbitÂing around a superÂmasÂsive black hole at the cenÂter of our galaxy over the past 15 earth years. AccordÂing to Holz, these orbits, filmed with the largest teleÂscopes in the world on MauÂna Kea, are simÂply “one of the best ways (short of the detecÂtion of gravÂiÂtaÂtionÂal waves from black hole mergÂers) of conÂfirmÂing that black holes exist.” And it’s quite rightÂly an “incredÂiÂble feat of obserÂvaÂtionÂal astronÂoÂmy.” For more, read Holz’s piece on DisÂcovÂer’s CosÂmic VariÂance blog. AnothÂer big thanks to Mike for passÂing this one our way…
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