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Title          
NASA: Exploring Ozone 
   
 
Abstract    
For more information:http://www.nasa.gov/vision/earth/environment/ozone_resource_ page.htmlThis short video combines dynamic ozone visualizations with an int...
 
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Added By - appliedmath
Subject - Earth and Atmospheric Sciences
Document Type - Documentary
Video Duration - 00:02:20
 
 
 

 

Title          
United States Space Explorations 1958 
   
 
Abstract    
The film describes preparation and launch of five satellites and two space probes during 1958. On January 31, a Jupiter vehicle launched Explorer I into space. Data from this satellite was used to identify the van Allen radiation belts. On March 17, a Vanguard I rocket launched an Earth satellite with solar batteries. Data from the mission was used to determine that the Earth is slightly pear-shaped. On March 26, Explorer III was launched to further study the van Allen belts, micrometeoroid impacts, and internal and external temperatures. Explorer IV, launched on July 26, was intended to study radiation and temperature data. A lunar probe, ABLE I, was intended to measure radiation, magnetic fields of Earth and the Moon, density of micrometeoric matter, and internal temperatures. A four-stage rocket was used in the launch. However, a turbo-pump failed and the liquid oxygen pump stopped, resulting in a failed mission. On October 10, Pioneer I was launched by an ABLE vehicle. First and second stage velocity was less than desired and the probe did not leave Earth orbit. Attempts to attain escape velocity were unsuccessful. On December, a Jupiter boost vehicle was used to launch Juno II, with Pioneer III as the payload. Escape velocity...
 
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Added By - A Ghosh
Subject - Aeronautics and Astronautics
Document Type - Documentary
Video Duration - 00:18:51
 
 
 

 

Title          
Apollo-Lunar Orbital Rendezvous Technique 
   
 
Abstract    
The film shows artists rendition of the spacecrafts, boosters, and flight of the Apollo lunar missions. The Apollo spacecraft will consist of three modules: the manned Command Module; the Service Module, which contains propulsion systems; and the Lunar Excursion Module (LEM) to carry astronauts to the moon and back to the Command and Service Modules. The spacecraft will be launched via a three-stage Saturn booster. The first stage will provide 7.5 million pounds of thrust from five F-1 engines for liftoff and initial powered flight. The second stage will develop 1 million pounds of thrust from five J-2 engines to boost the spacecraft almost into Earth orbit. Immediately after ignition of the second stage, the Launch Escape System will be jettisoned. A single J-2 engine in the S4B stage will provide 200,000 pounds of thrust to place the spacecraft in an earth parking orbit. It also will be used to propel the spacecraft into a translunar trajectory, then it will separate from the Apollo Modules. Onboard propulsion systems will be used to insert the spacecraft into lunar orbit. Two astronauts will enter the LEM, which will separate from the command and service modules. The LEM will go into elliptical orbit and prepare for landing. Th...
 
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Added By - A Ghosh
Subject - Aeronautics and Astronautics
Document Type - Demonstration
Video Duration - 00:05:45
 
 
 

 

Title          
CO2 emissions and climate change 
   
 
Abstract    
Global warming is the increase in the average temperature of the Earth's near-surface air and oceans in recent decades and its projected continuation. The global average air temperature near the Earth's surface rose 0.74 ± 0.18 °C (1.33 ± 0.32 °F) during the 100 year period ending in 2005.[1] The Intergovernmental Panel on Climate Change (IPCC) concludes "most of the observed increase in globally averaged temperatures since the mid-20th century is very likely due to the observed increase in anthropogenic greenhouse gas concentrations"[1] via the greenhouse effect. Natural phenomena such as solar variation combined with volcanoes probably had a small warming effect from pre-industrial times to 1950 and a small cooling effect from 1950 onward.[2][3] These basic conclusions have been endorsed by at least 30 scientific societies and academies of science,[4] including all of the national academies of science of the major industrialized countries.[5][6][7] While individual scientists have voiced disagreement with the conclusions of the IPCC[8], the overwhelming majority of scientists working on climate change are in agreement with the conclusions.
 
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Added By - publichealth
Subject - Public Health
Document Type - Discussion
Video Duration - 00:01:55
 
 
 

 

Title          
The Lunar Orbiter: A Spacecraft to Advance Lu... 
   
 
Abstract    
1966. The film describes the Lunar Orbiter's mission to photograph landing areas on the Moon. The Orbiter will be launched from Cape Kennedy using an Atlas Agena booster rocket. Once it is boosted in a trajectory toward the Moon, the Orbiter will deploy two-way earth communication antennas and solar panels for electricity. Attitude control jets will position the solar panels toward the sun and a tracker for a fix on its navigational star. The Orbiter will be put in an off-center orbit around the Moon where it will circle from four to six days. Scientists on Earth will study the effects of the Moon's gravitational field on the spacecraft, then the orbit will be lowered to 28 miles above the Moon's surface. Engineers will control the Orbiter manually or by computer to activate two camera lenses. The cameras will capture pictures of 12,000 square miles of lunar surface in 25 and 400 square mile increments. Pictures will be sent back to Earth using solar power to transmit electrical signals. The signals will be received by antennas at Goldstone, CA, and in Australia and Spain. Incoming photographic data will be electronically converted and processed to produce large-scale photographic images. The mission will be directed from the Spac...
 
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Added By - A Ghosh
Subject - Aeronautics and Astronautics
Document Type - Demonstration
Video Duration - 00:07:38
 
 
 

 

Title          
Radiometric Dating Revisited 
   
 
Abstract    
Radiometric dating (often called radioactive dating) is a technique used to date materials, usually based on a comparison between the observed abundance of a naturally occurring radioactive isotope and its decay products, using known decay rates.[1] It is the principal source of information about the absolute age of rocks and other geological features, including the age of the Earth itself, and can be used to date a wide range of natural and man-made materials. Among the best-known techniques are radiocarbon dating, potassium-argon dating and uranium-lead dating. By allowing the establishment of geological timescales, it provides a significant source of information about the ages of fossils and the deduced rates of evolutionary change. Radiometric dating is also used to date archaeological materials, including ancient artifacts. Different methods of radiometric dating vary in the timescale over which they are accurate and the materials to which they can be applied.
 
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Added By - justin
Subject - Earth and Atmospheric Sciences
Document Type - Definition
Video Duration - 00:03:07
 
 
 

 

Title          
Moon Return Video 
   
 
Abstract    

The newest NASA animation about the constellation program.

Constellation is a NASA program with the stated goal of gaining significant experience in operating away from Earth's environment, developing technologies needed for opening the space frontier and conducting fundamental science.[1] Constellation was developed through the Exploration Systems Architecture Study, which determined the best way for NASA to pursue the goals laid out in President George W. Bush's Vision for Space Exploration and the NASA Authorization Act of 2005.

NASA plans to develop a ...

 
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Added By - appliedmath
Subject - Aeronautics and Astronautics
Document Type - Documentary
Video Duration - 00:02:00
 
 
 

 

Title          
Physics of Fluids - Waves in a large free sph... 
   
 
Abstract    
In physics a free surface is the surface of a body that is subject to neither perpendicular normal stress nor parallel shear stress, such as the boundary between two homogenous fluids, for example liquid water and the air in the Earth's atmosphere. Unlike liquids, gases cannot form a free surface on their own. A liquid in a gravitational field will form a free surface if unconfined from above. Under mechanical equilibrium this free surface must be perpendicular to the forces acting on the liquid; if not there would be a force along the surface, and the liquid would flow in that direction. Thus, on the surface of the Earth, all free surfaces of liquids are horizontal unless disturbed (except near solids dipping into them, where surface tension distorts the surface locally). If the free surface of a liquid is disturbed, waves are produced on the surface. These waves are not elastic waves due to any elastic force; they are gravity waves caused by the force of gravity tending to bring the surface of the disturbed liquid back to its horizontal level, but due to momentum, it overshoots. Thus it oscillates and spreads the disturbance to the neighboring portions of the surface. The velocity of the surface waves varies as the square ...
 
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Added By - sidpatel
Subject - Mechanical Engineering
Document Type -
Video Duration - 00:02:52
 
 
 

 

Title          
The Hubble Deep Field: The Most Important Ima... 
   
 
Abstract    

n 2003, the Hubble Space Telescope took the image of a millenium, an image that shows our place in the universe. Anyone who understands what this image represents, is forever changed by it.

The Hubble Space Telescope (HST) is a telescope in orbit around the Earth, named after astronomer Edwin Hubble. Its position outside the Earth's atmosphere provides significant advantages over ground-based telescopes — images are not blurred by the atmosphere, there is no background from light scattered by the air, and the Hubble can observe ultra-violet light that is normally absorbed by the ozone layer in observations made from Earth. Since its launch in 1990, it has become one of the most important instruments in the history of astronomy. With it, astronomers have made many observations leading to breakthroughs in astrophysics. Hubble's Ultra Deep Field is the most sensitive astronomical optical image ever taken.

From its original conception in 1946 until its launch, the project to build a space telescope was beset by delays and budget problems. Immediately after its 1990 launch, it was found that the main mirror suffered from spherical aberration due to faulty quality control during its manufac...

 
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Added By - 123456
Subject - Astronomy
Document Type - Documentary
Video Duration - 00:00:02
 
 
 

 

Title          
Soyuz Rocket Launch Failure - Scary Rocket Ex... 
   
 
Abstract    
A Russian Soyuz rocket carrying a Foton M-1 satellite has a total failure during launch and collides into the Earth with a large explosion. Caught on camera by multiple people from different angles by European Space Agency members (ESA Team). There are conflicting reports of injuries to some Russian Space Force members.
 
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Added By - matlabuser
Subject - Aeronautics and Astronautics
Document Type -
Video Duration - 00:06:37
 
 
 

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