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As seen on #Cosmos: Meteors

Shooting stars, or meteors, are bits of interplanetary material falling through Earth's atmosphere and heated to incandescence by friction. These objects are called meteoroids as they are hurtling through space, becoming meteors for the few seconds they streak across the sky and create glowing trails.

Scientists estimate that 44 tonnes (44,000 kilograms, about 48.5 tons) of meteoritic material falls on the Earth each day. Several meteors per hour can usually be seen on any given night. Sometimes the number increases dramatically - these events are termed meteor showers. Some occur annually or at regular intervals as the Earth passes through the trail of dusty debris left by a comet. Meteor showers are usually named after a star or constellation that is close to where the meteors appear in the sky. Perhaps the most famous are the Perseids, which peak around 12 August every year. Every Perseid meteor is a tiny piece of the comet Swift-Tuttle, which swings by the Sun every 135 years. Other meteor showers and their associated comets are the Leonids (Tempel-Tuttle), the Aquarids and Orionids (Halley), and the Taurids (Encke). Most comet dust in meteor showers burns up in the atmosphere before reaching the ground; some dust is captured by high-altitude aircraft and analyzed in NASA laboratories.

Chunks of rock and metal from asteroids and other planetary bodies that survive their journey through the atmosphere and fall to the ground are called meteorites. Most meteorites found on Earth are pebble to fist size, but some are larger than a build-ing. Early Earth experienced many large meteorite impacts that caused extensive destruction.

Image credit: NASA/JPL
#meteor #meteorite #nasa #space


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TheWarrior0123's profile photoSuzanne W's profile photoian bennett's profile photoJohn Eckstine's profile photo
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Spectacular photo!!
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The SpaceX Dragon cargo spacecraft was berthed to the Harmony module of the International Space Station at 10:06 a.m. EDT while traveling 260 miles above Brazil. The hatch between the newly arrived spacecraft and the space station is scheduled to be opened Monday. The capsule is scheduled to spend 28 days attached to the station. 

Dragon is delivering about 2.5 tons of science investigations, vehicle hardware, spacewalking equipment and supplies for the crew. The scientific payloads on Dragon include investigations into efficient plant growth in space, human immune system function in microgravity, Earth observation, and a demonstration of laser optics communication. Also being delivered is a set of high-tech legs for Robonaut 2, which will provide the humanoid robot torso already aboard the orbiting laboratory the mobility it needs to help with regular and repetitive tasks inside the space station. Dragon also is delivering a second set of investigations sponsored by the Center for the Advancement of Science in Space (CASIS), which manages the portion of the space station that is designated a U.S. National Laboratory. The investigations include research into plant biology and protein crystal growth, a field of study experts believe may lead to beneficial advancements in drug development through protein mapping.

For an overview of newly delivered science investigations aboard Dragon, visit: http://go.nasa.gov/QavzGo 
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Antonio Pereira's profile photoAremu Musa's profile photoMohamed Ibrahim Seddik's profile photoP.J. Talbot's profile photo
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Tudo isso estás com os dias contados, em breve, tudo tornará há terra! há a respeito da lua homem nenhum colocou os pés lá! 
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The International Space Station and Dragon flight control teams are proceeding toward rendezvous and berthing at approximately 7:14 a.m. EDT on Sunday.
 
SpaceX reported all spacecraft systems are ready for the final stages of rendezvous and space station flight controllers reported the orbiting outpost is ready for the commercial spacecraft's arrival.
 
NASA TV coverage of rendezvous and grapple is underway this morning: http://www.nasa.gov/nasatv

To learn more about the mission and the International Space Station, visit: http://www.nasa.gov/station
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Gardner Grove's profile photo陶俞陆's profile photoVincent Paul Pinto's profile photoArmando Trujillo's profile photo
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期待SpaceX可回收火箭的目标达成~
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Our Digital Learning Network, the +U.S. Department of State's  Collaboratory, and +Google Students's Connected Classrooms invite educators and students to their Mission Mars Virtual Field Trip.  The online event will take place on Friday, April 25, 2014 from 2:00-3:00p.m. EDT, in conjunction with the 2014 USA Science and Engineering Festival in Washington, D.C.  This #MarsFieldTrip event will feature a special lesson about Mars rovers, along with interactions among NASA experts and students worldwide. Learn more at: https://plus.google.com/events/clh5chhn9eqbl0cv4rfm0eqk788
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Jeremy Tinana's profile photojacques van's profile photoVincent Paul Pinto's profile photoSinan Iqbal's profile photo
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just dont name the spaceship anything that starts with a c... we all know what happened then :)
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And liftoff! SpaceX's Falcon 9 rocket with Dragon spacecraft lifted off at 3:25 p.m. EDT from Launch Complex 40, Cape Canaveral Air Force Station, Fla. and is on its way to the International Space Station. Dragon’s twin solar arrays deployed on schedule less than 15 minutes after launch. They will allow the spacecraft to recharge its batteries on its way to the space station. 
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Gardner Grove's profile photoNene Rdz's profile photoEgon Gefferie's profile photodimas dsantoso's profile photo
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Newton defeated again.
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Fly along with our Operation IceBridge team in Greenland right now as they use lasers to measure changes in Arctic ice cover.
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Murat Teyyare's profile photoTony Adams's profile photoJim Chatman's profile photoSPACE & EARTH's profile photo
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buenísimo excelente.
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Expedition 39 Commander Koichi Wakata of the Japan Aerospace Exploration Agency, with the assistance of NASA’s Rick Mastracchio, successfully captured the SpaceX Dragon spacecraft with the station’s robotic arm at 7:14 a.m. EDT while 260 miles above Egypt. Operations to berth Dragon to the space station begin at approximately 9:30 a.m.

Dragon is delivering more than 3,000 pounds of science and supplies for the space station crew.

 For more info: http://www.nasa.gov/spacex
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Erroll Ward's profile photoMutz Metz's profile photoAxel Enuset's profile photoRicardo Blanco's profile photo
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Anyone else looking at this picture, see a cow milking machine. Milking the science towards space exploration.
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[Video] This Week @NASA,‪#‎Dragon‬ takes flight, a lunar ending for @NASALADEE, and an Earthly cousin found  http://youtu.be/NAsYbYRPan8
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FRANCISCO JOSE MARQUEZ GUERRERO's profile photoTushar rex's profile photoAxel Enuset's profile photoPritam Deshmukh's profile photo
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Interesting!
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Researchers were greatly surprised to discover 3-million-year-old landscape beneath Greenland Ice Sheet! The finding provides strong evidence that the Greenland Ice Sheet has persisted much longer than previously known, enduring through many past periods of global warming.

The new discovery indicates that even during the warmest periods since the ice sheet formed, the center of Greenland remained stable. "It’s likely that it did not fully melt at any time," said University of Vermont geologist and lead author Paul Bierman. This allowed a tundra landscape to be locked away, unmodified, under ice through millions of years of global warming and cooling.

Image Credit: Joshua Brown, University of Vermont

#ice #green;and #nasa #science #climate #climatechange #greenlandicesheet

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Stephen Dillon's profile photosanjay pithwa's profile photoMitesh Sanghvi's profile photoRicardo Blanco's profile photo
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Any evidence for your opinions? +keith Newton
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Tune in now for a briefing on today's +SpaceX  #Dragon launch to #ISS . www.nasa.gov/nasatv Miss the launch? Replay: http://go.nasa.gov/1kJWiFm
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Olivier Klastat's profile photoDeepak Kumar Patel's profile photoMuhammad Najmi Ahmad Zabidi's profile photoAxel Enuset's profile photo
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Good news, thank you!
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Introduction

NASA's mission is to pioneer the future in space exploration, scientific discovery and aeronautics research. To do that, thousands of people have been working around the world and in space for more than 50 years, trying to answer some basic questions. What's out there in space? How do we get there? What will we find? What can we learn there -- or learn just by trying to get there -- that will make life better here on Earth?


NASA's work is diverse: proving flight technologies; creating capabilities for sustainable human and robotic exploration; exploring Earth, the solar system and the universe beyond; developing critical enabling technologies such as the space shuttle; and conducting science in orbit aboard the International Space Station. With NASA you can explore the universe and discover Earth.