Zero Gravity
Zero Gravity
Zero Gravity (pronounced: /ˈziːroʊ ˈɡrævɪti/), also known as weightlessness or microgravity, is a condition in which the force of gravity is so weak that weight effects are negligible. The term is most commonly used in the context of space travel and astronautics.
Etymology
The term "zero gravity" originates from the concept that in a free-falling reference frame, there appears to be no force of gravity. This is because everything in the frame is following the same curved path as it falls. The term "microgravity" is used to denote environments where the force of gravity is present but has a negligible effect.
Related Terms
- Gravity: The force that attracts a body towards the centre of the earth, or towards any other physical body having mass.
- Space Travel: The movement of individuals and payloads beyond the surface of the Earth.
- Astronautics: The theory and practice of navigation beyond Earth's atmosphere.
- Free Fall: Any motion of a body where gravity is the only force acting upon it.
Medical Implications
Zero gravity has several medical implications. In the absence of gravity, the human body undergoes several physiological changes. These include muscle atrophy, bone loss, and fluid redistribution, which can lead to space motion sickness. Prolonged exposure to zero gravity can also have detrimental effects on the cardiovascular system and immune system.
See Also
External links
- Medical encyclopedia article on Zero Gravity
- Wikipedia's article - Zero Gravity
This WikiMD dictionary article is a stub. You can help make it a full article.
Languages: - East Asian
中文,
日本,
한국어,
South Asian
हिन्दी,
Urdu,
বাংলা,
తెలుగు,
தமிழ்,
ಕನ್ನಡ,
Southeast Asian
Indonesian,
Vietnamese,
Thai,
မြန်မာဘာသာ,
European
español,
Deutsch,
français,
русский,
português do Brasil,
Italian,
polski