Categories
- Glossary
Suggest a new Definition
Proposed definitions will be considered for inclusion in the Economictimes.com
Space-Technology
- PREV DEFINITION
Zenith
Zenith is the imaginary point that is directly above a particular location on the celestial sphere. It is vertically opposite to the apparent gravitational force i.e. directly opposite to the gravitational pull. It is the highest point on the sphere and thus, the farthest up from the gravitational force.
Read More
Definition: Zero Gravity or Zero-G can simply be defined as the state or condition of weightlessness. It also refers to the state in which the net or an apparent effect of gravity (i.e. the gravitational force) is zero.
Description: The condition of apparent weightlessness occurs when a body in a gravitational field changes places to neutralize its gravitational force. For example, astronauts are seen floating around in the outer space because of this phenomenon. Astronauts orbiting the Earth in a space station experience zero gravity or weightlessness because their spacecraft continuously undergoes changes in velocity in its orbit in order to prevent it from being pulled into the atmosphere. This acceleration, which is often known as a centrifugal force, counterbalances gravity. Hence, they experience Zero Gravity or weightlessness.
Sir Isaac Newton, an English mathematician and physicist, discovered gravity. To help explain this concept better, we can take an example of a block of lead in free fall on planet x. The block is said to be in a state of weightlessness even though it is being pulled down by the planet's gravity. Satellites, projectiles, galaxies, planets etc. are influenced by the force of gravity. Zero gravity on earth is 0 m/s2. Not having to bear weight on your feet appears relaxing but in the long term, you could face many health problems like the weakening of bones and muscles. Other changes also take place, which have been identified by numerous studies. The most common problem faced by humans in the initial hours of weightlessness is known as SAS (Space Adaptation Syndrome) like vomiting, nausea etc.
Read More News on
- ZERO GRAVITYGRAVITYGRAVITATIONAL FORCEZERO-G
- WEIGHTLESSNESS
- PREV DEFINITION
Zenith
Zenith is the imaginary point that is directly above a particular location on the celestial sphere. It is vertically opposite to the apparent gravitational force i.e. directly opposite to the gravitational pull. It is the highest point on the sphere and thus, the farthest up from the gravitational force.
Read More
Related Definitions
- Achromatic LensAn achromatic lens can be defined as a lens which is made by a combination of two different types of lenses carrying different focal powers in a manner such that the images formed by the light of both the combined lenses are free from chromatic aberration or achromatism.Description: A lens which is specially designed to control the effects of chromatic distortion or aberration (a defect of optAuroraAn aurora is a natural phenomenon which is characterised by a display of a natural-coloured (green, red, yellow or white) light in the sky. It is a light show which is caused when electrically-charged particles from the sun collide with particles from gases such as oxygen and nitrogen present in the Earth’s atmosphere.Description: Aurora is sometimes referred to as ‘polar light’. It is predomiCelssCELSS (Controlled Ecological Life Support System) is a scientific endeavor towards the creation of self-supporting environments to maintain and support human life on space stations or colonies. CELSS are typically “Living machines” which should ideally provide full life support (fresh air, organic food and clean water) to its inhabitants by continuous recycling of the waste products produced by thChandrayaan 1Chandrayaan-1, India’s first mission to moon, was an unmanned spacecraft weighing 1380-Kg along with 11 scientific payloads built in India, UK, USA, Germany, Bulgaria and Sweden. The mission comprised an orbiter and an impactor. Launched successfully by the Indian Space Research Organisation (ISRO) on October 22, 2008, the spacecraft was designed to study the Moon orbiting around it at a height of
- ChromosphereChromosphere is a reddish and glowing layer of gas above a star’s (or Sun's) photosphere. It is actually the transition between corona and the photosphere. Out of the three layers of the Sun’s atmosphere, chromosphere is the second one (with photosphere being the first layer and corona as the third).Description: As the name suggests, chromosphere literally translates into ‘sphere of light’. ItCoronaCorona is a luminous envelope of plasma that surrounds the Sun and other celestial bodies. It is extended to millions of kilometres into space and is commonly seen during a total solar eclipse. The intense temperature of the Sun's corona is due to the presence of highly ionized ions which give it a spectral feature.Description: The corona of the Sun is much hotter than its visible surface. TheCryogenic EngineA cryogenic engine/ cryogenic stage is the last stage of space launch vehicles which makes use of Cryogenics. Cryogenics is the study of the production and behaviour of materials at extremely low temperatures (below -150 degree Centigrade) to lift and place the heavier objects in space.Description: Cryogenic stage is technically a much more complexed system with respect to solid or liquid propDsnDSN (Deep Space network) is a network of large antennas and communication facilities, developed and established in the US by the NASA (National Aeronautics and Space Administration). It is spread across the world to support communication with spacecrafts on interplanetary missions. The DSN also provides the ability to support some Earth-orbiting missions (at Sun-Earth LaGrange points, at lunar dis
- Dark MatterDark Matter is referred to the hypothetical matter that scientists have not been able to locate in the universe - either through telescopes or using any other technological method. 27% of the matter in the universe is said to be dark matter. Its existence came to the fore because of its gravitational effects on matters that are visible in the universe.Description: Scientists have been unable tDoppler EffectDoppler Effect refers to the change in wave frequency during the relative motion between a wave source and its observer. It was discovered by Christian Johann Doppler who described it as the process of increase or decrease of starlight that depends on the relative movement of the star.Description: Doppler Effect works on both light and sound objects. For instance, when a sound object moves tow
Related News
Space Elevator to be ready by 2050. Press a button and you are in space. Details hereA Japanese company is developing a space elevator to take tourists into space in an elevator at the press of a button. This project will be ready by 2050.- As per reports, Zion T and Chaeyoung are frequently spotted together in locales like Hannam-Dong and Yeonhui-Dong. Kim Hae-sol, widely recognized by his stage name Zion T, is a beloved hip-hop artiste in South Korea.
- Indian space sector to be turned into a business activity: ISRO chairmanISRO Chairman S Somanath stated that the Indian space sector is transitioning from a closed and secretive society to an open one, with the goal of transforming it into an economic activity. The shift is influenced by the economic success of space-related activities in countries like the USA.
- 'I love you, Woody Allen.' Alec Baldwin dismisses cancel culture, all set to interview film-maker on Instagram liveThe 86-year-old director has denied the allegations of sexual abuse.
- New tech to make satellite launches more accessibleLeo Aerospace LLC, a company affiliated to Purdue University in the US, plans to use "rockoons" or high-altitude balloons, that launch rockets into suborbital and orbital flights.
- You can now navigate through the International Space Station and get a view of the Earth from outer space on Google MapsIf you've ever wondered what the inside of a spaceship looks like, here's your chance to go explore.
- Gecko-inspired robot gripper may help clean space wasteNew York, June 29 (IANS) Researchers have designed a new kind of robotic gripper, inspired by the grasping ability of a gecko, to grab and dispose of human-made debris in space that can pose a threat to satellites and space vehicles.
- Zero gravity can affect regenerative health of space travellersNew York, June 10 (IANS) Scientists studying flatworms that were part of a five-week experiment aboard the International Space Station (ISS) have found that absence of normal gravity can affect anatomy, behaviour and microbiology, especially their ability to regenerate.
- NASA to use mixed reality space station to train astronautsTo become a qualified NASA astronaut, candidates spend up to two years of training through intensive classes and simulations that help prepare for working in zero gravity
- Now, experience zero gravity in your living room with the world’s first levitating turntableThe MAGLEV Audio visually enhances the experience of listening to vinyl records.
Trending DefinitionsRailways Budget 2024Interim Budget 2024Budget 2024 New Tax RegimeIncome Tax in Budget 2024Debt fundsSensexNiftyRepo rateMutual fundGross domestic productData miningAdvertisingProductMonopolyCryptographyDepreciation
