Anand Sri Krishnan

114,075 views|May 22, 2017,1:56 pm Which Space Agencies Are Considered The Best In The World? Quora Contributor (Photo: JODY AMIET/AFP/Getty Images) What are the top space agencies in the world?  originally appeared on  Quora :  the place to gain and share knowledge, empowering people to learn from others and better understand the world . Answer  by  Nicolas Nelson , advocate for human space development, on  Quora : The Big Six [space agencies] are, in alphabetical order: CNSA,  the Chinese National Space Agency ESA,  the European Space Agency, a consortium of national space agencies of several European countries ISRO , the Indian Space Research Organization JAXA , the Japanese space agency NASA , the American space agency Roscosmos , the Russian space agency Each of them provides launch services (i.e. builds their own orbital-class rockets), builds their own satellites and scientific payloads, and has either achieved human spaceflight or interplanetary robotic science m

Open main menu Search Atmosphere Read in another language Watch this page Edit This article is about an atmosphere of a celestial body. For Earth's atmosphere, see  Atmosphere of Earth . For other uses, see  Atmosphere (disambiguation) . "Atmospheric environment" redirects here. For the scientific journal, see  Atmospheric Environment . This article  needs additional citations for  verification . Mars's thin atmosphere The layers of Earth's atmosphere An  atmosphere  (from  Ancient Greek  ἀτμός  (atmos) , meaning 'vapour', and σφαῖρα  (sphaira) , meaning 'ball' or 'sphere' [1] [2] ) is a layer or a set of layers of  gases  surrounding a  planet  or other  material body , that is held in place by the  gravity  of that body. An atmosphere is more likely to be retained if the gravity it is subject to is high and the temperature of the atmosphere is low. The  atmosphere of Earth  is composed of  nitrogen  (about 78%),  oxygen  (ab

Open main menu Search Franklin Institute Read in another language Watch this page Edit This article is about the science museum in Philadelphia. For the Boston school, see  Benjamin Franklin Institute of Technology . The Franklin Institute  is a science museum and the center of science education and research in  Philadelphia, Pennsylvania . It is named after the American scientist and  statesman ,  Benjamin Franklin , and houses the  Benjamin Franklin National Memorial . Founded in 1824, the Franklin Institute is one of the oldest centers of science education and development in the United States. The Franklin Institute Wikimedia  | ©  OpenStreetMap Established1824Location Philadelphia ,  Pennsylvania Type Science museum PresidentLarry DubinskiPublic transit access     SEPTA  bus:  7 ,  32 ,  33 ,  38 ,  48 ,  49   Philly PHLASH Website The Franklin Institute Franklin Institute Science Museum U.S. National Register of Historic Places Franklin Institute Show map of Phila

Open main menu Search List of Apollo astronauts Read in another language Watch this page Edit Learn more This article  needs additional citations for  verification . Most of the Apollo astronauts gathered at the  Johnson Space Center  in Houston in 1978. Names are included even for those not in the photo, with moonwalkers names in white and those who flew to the Moon without landing shown in dark grey. (Other names are shown in faint grey.) Thirty-two  astronauts  were assigned to fly in the  Apollo manned lunar landing program . Twenty-four of them, flying on nine different missions, reached an orbit around the  Moon . (Of the other manned missions,  Apollo 1  did not launch and  Apollo 7  and  Apollo 9  were  low Earth orbit  spacecraft testing missions). In addition, nine astronauts flew Apollo spacecraft in the Apollo Applications Programs  Skylab  and  Apollo–Soyuz Test Project . Twelve of these astronauts walked on the Moon's surface, and six of those drove  Lunar R