Zero-gravity on Earth

Zero-gravity on Earth
Microgravity, which is the condition of relative near weightlessness, can only be achieved on Earth by putting an object in a state of free fall.

NASA conducts microgravity experiments on Earth using drops towers and aircraft flying parabolic trajectories. 

Drop tower

NASA, Zero Gravity Research Facility at Glennwas originally designed and built during the space race era of the 1960s to support research and development of spaceflight components and fluid systems in a weightless environment. 

The Zero Gravity Research Facility provides a near-weightless or microgravity environment for a duration of 5.18 seconds.
(Mezzanine view of the drop vehicle and release mechanism being positioned over the vacuum chamber with a technician signaling the crane operator in the Zero Gravity Research Facility.)

 This is accomplished by allowing the experiment vehicle to free fall, in a steel vacuum chamber, a distance of 432 feet (132 meters).  
Experimental drop vehicles used in the facility can accommodate payloads up to 1,000 pounds (455 kg). 

Parabolic flight 
Zero gravity, or more accurately, microgravity, is created on Earth during parabolic flights by flying an airplane in a specific trajectory that mimics freefall. The aircraft climbs steeply, creating a period of increased gravity, then enters a controlled dive, allowing both the plane and its contents to fall together, resulting in a temporary state of weightlessness. 
NASA conducts experiment withZero Gravity Corporation, a Florida-based company piloting a specially modified B-727 and also works with Novespace, a Bordeaux-Mérignac, France-based company flying parabolas with A310s.

Compiled by 
Ms Naresh kuwar


To buy full article including 
'Zero gravity - Vivaldi experiment', Mail me at 
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