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“The Knowledge Library”
Knowledge for All, without Barriers…
An Initiative by: Kausik Chakraborty.
“The Knowledge Library”
Knowledge for All, without Barriers……….
Knowledge for All, without Barriers…
एक राजा थे। वन-विहार को निकले। रास्ते में प्यास लगी। नजर दौड़ाई एक अन्धे की झोपड़ी दिखी। उसमें जल भरा घड़ा दूर से ही दिख रहा था। राजा ने सिपाही को भेजा और एक लोटा जल माँग लाने के लिए …
What is Rocket Staging? Staging is the combination of several rocket sections, or stages, that fire in a specific order and then detach, so a ship can penetrate Earth’s atmosphere and reach space. The operative principle behind rocket stages is …
What is the Hohmann Transfer? The Hohmann transfer is a system of firing rockets that physicists use to move a spacecraft into a different altitude of orbit. To understand how the Hohmann transfer works, it’s important to understand the broader …
There are two main types of fuel used to get rockets off Earth: solid and liquid. In the United States, NASA and private space agencies use both. Solid rockets are simple and reliable, like a Roman candle, and once ignited there’s …
What is Newton’s Law of Universal Gravitation? Newton’s law of universal gravitation states that two bodies in space pull on each other with a force proportional to their masses and the distance between them. For large objects orbiting one another—the …
What is a Space Station? Space stations enable us to experience and take advantage of spaceflight over long periods of time. Astronaut Chris Hadfield has describes them as “purpose-built laboratories orbiting the world.” Their unique environment allows us to conduct experiments …
What is Orbital Velocity? Orbital velocity is the speed required to achieve orbit around a celestial body, such as a planet or a star. This requires traveling at a sustained speed that: Aligns with the celestial body’s rotational velocity Is …
What is the Sabatier Reaction? The Sabatier reaction is a process that produces water (hydrogen and oxygen) and methane through a reaction of hydrogen with carbon dioxide. The beauty of the Sabatier reaction is that it’s nearly a closed loop: …
What is Salyut 1? Salyut 1 was the world’s first space station—a predecessor to the likes of today’s International Space Station (ISS). It was built by the USSR, which launched it into low Earth orbit on 19 April 1971. As …
What was the Gemini Spacecraft? The Gemini (also called the Gemini capsule or the Gemini spacecraft) was a conical, manned spacecraft for two astronauts used by the U.S. space program from 1965 to 1966. It was designed for and used …
What is a Lunar Lander? A lunar lander is a type of spacecraft designed to land on the surface of the moon. It’s also known as a moon lander. 4 Famous Lunar Landers in History Humans have been building lunar …
What was the Buran Space Shuttle? The Buran space shuttle was a spaceplane developed by the Soviet Union as part of the Buran program. The Buran shuttle was created in response to NASA’s space shuttle program and made its first—and …
What is the History of Space Shuttle Launches? The space shuttle was developed by NASA as a partially reusable low Earth orbital spacecraft. The NASA Space Shuttle Program was designed as a way to send NASA astronauts into space at …
What is Ethology? Ethology is the scientific study of animal behavior—including animal communication, predation, defense, aggression, mating, imprinting, fixed action patterns and releasers, and migration—most often in their natural conditions. One major facet of ethology is the study of instinct …
What is a Scientific Theory? A scientific theory is a description of the natural world that scientists have proven through rigorous testing. As understood within the scientific community, a theory explains how nature behaves under specific conditions. Theories tend to …
What is Barometric Pressure? Barometric pressure, also called atmospheric pressure, is the measure of the weight of Earth’s atmosphere. The atmosphere has five layers: exosphere, thermosphere, mesosphere, stratosphere, and troposphere, which is the layer closest to the Earth’s surface. Barometric …
What is the Fibonacci Sequence? The Fibonacci sequence is one of the most well-known formulas in number theory and one of the simplest integer sequences defined by a linear recurrence relation. In the Fibonacci sequence of numbers, each number in …
What is a Carbon Footprint? A carbon footprint is the amount of greenhouse gas emissions (GHG emissions) released into the atmosphere by an individual, population, organization, product, or service. GHG emissions consist largely of carbon dioxide, as well as methane, …