Introduction — Why Should You Care About Space? Imagine you are sitting in a remote village in Arunachal Pradesh. A cyclone is approaching the coast of Odisha. A fisherman in the deep sea has no idea about the approaching storm. A farmer in Rajasthan does not know that a drought is developing. And an Indian…
In space technology, propulsion systems are the mechanisms that generate thrust to launch, steer, and manoeuvre spacecraft. Propulsion derived from the Latin ‘propellere’, meaning ‘to drive forward.’ The key measure of propulsion efficiency is Specific Impulse (Isp) — the thrust produced per unit of propellant consumed per second. Higher Isp = more efficient engine. This…
Introduction to Satellites Long before we had the word ‘satellite’, the Moon was doing its job — faithfully orbiting Earth, influencing tides, and guiding ancient navigators. Today, humanity has sent over 9,000+ artificial satellites into orbit (though not all are active). These metal messengers in the sky touch almost every aspect of modern life —…
Imagine you are standing on a tall hill and you throw a stone horizontally. It falls to the ground due to gravity. Now, what if you threw it so fast that as it falls, the Earth’s surface curves away beneath it? The stone would never hit the ground — it would keep going around the…
Science and Technology Policy in India Policy is the compass that guides a nation’s scientific direction. India has evolved its S&T policy five times since independence — each evolution reflecting the changing needs of the nation. Think of it as India’s scientific self-awareness growing over time: from ‘build institutions’ in 1958 to ‘open science for…
A scientist without a laboratory is like a soldier without weapons. India’s S&T success depends critically on its institutional architecture — the organisations, ministries, and bodies that fund research, set policy, and translate discoveries into applications. Let us map this ecosystem clearly, because UPSC frequently asks about institutional roles. Ministry of Science and Technology (MoST)…
India’s scientists did not just contribute to Indian progress — many of them changed the world. From a monk-like mathematician working in isolation in Madras, to a missile engineer who became the most beloved President of India, these are stories of brilliance, determination, and quiet patriotism. Learn these profiles not just for Prelims facts but…
India is not a latecomer to science. Before Europe had universities, India had Nalanda and Takshashila. Before the West developed algebra, India gave the world Zero. Before modern surgery, India had Sushruta performing rhinoplasty. The story of Science and Technology in India is, in many ways, the story of a civilisation’s journey — from ancient…
Science is not just about equations and experiments — it is about people. Behind every great discovery is a human being with curiosity, courage, and often, a streak of obsession. Let us meet the architects of the modern world — those individuals whose ideas changed everything. UPSC frequently asks about their contributions; remember these profiles…
History is the best teacher of Science. To understand where we are, we must understand how we got here. The story of S&T is the story of human civilisation itself — full of genius, courage, curiosity, and sometimes, tragedy. Let us travel through time, era by era. Think of this as a cinematic journey —…
