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you became taller in space
another change to the human body in micro-gravity is than spine straightens out,as gravity is not pushing you down -
astronomy is the oldest science
mercury,neus,mars,jupiter and saturn were well-known in ancient times beacuse they easily seen with the naked eye and their movements are easily differentiated from stars which are in a fixed position -
the telescope,a key invention
the invention of the telescope in the 17th century led to huge advances in the study of the astronomy -
moon orbit
the moon orbits earth in the prograde direction and completes one revolution relative to the stars -
medieval and renaissance world
the indian astronomer pruposes that the Earth turns on its own galaxy -
early modern world
1605 - The German mathematician and astronomer Johannes Kepler establishes his three Laws of Planetary Motion, mathematical laws that describe the motion of planets in the Solar System, including the ground-breaking idea that the planets follow elliptical, not circular, paths around the Sun. -
modern world
1900 - The German physicist Max Planck suggests, while describing his law of black body radiation, that light may be emitted in discrete frequencies or “quanta”, and establishes the value of the Planck constant to describe the sizes of these quanta. This is often regarded as marking the birth of quantum physics. -
ancient world
20th -16th Century B.C. - Ancient Babylonian tablets show knowledge of the distinction between the moving planets and the “fixed” stars, and the recognition that the movement of planets are regular and periodic.
15th - 12th Century B.C. - The Hindu Rigveda of ancient India describes the origin of the universe in which a “cosmic egg” or Brahmanda, containing the Sun, Moon, planets and the whole universe, expands out of a single concentrated point before subsequently collapsing -
the Big Bang
Thus, space, time, energy and matter all came into being at an infinitely dense, infinitely hot gravitational singularity, and began expanding everywhere at once. Current best estimates are that this occurred some 13.7 billion years ago, although you may sometimes see estimates of anywhere between 11 and 18 billion years. -
the beginning of life
The study of the origin of life on Earth or, more specifically, how life on Earth began from inanimate matter, is technically known as abiogenesis (as opposed to biogenesis, which is the process of lifeforms producing other lifeforms, and as opposed to evolution, which is the study of how living things have changed over time since life first arose). -
black holes and wormholes
black holes are a phenomenon predicted by Albert Einstein's General Theory of Relativity, which was published in 1916. In fact, the idea of a black hole was proposed as early as 1783 by the amateur British astronomer John Michell (and independently by the Frenchman Pierre-Simon Laplace in 1795). -
special and general relativity
His ground-breaking theories take into account the speed of light, the structure of space-time and the equivalence of acceleration and gravity. They have led to some remarkable consequences, including the dilation of time, the contraction of length, mass-energy equivalence and the bending of light, as well as the prediction of the existence of black holes, wormholes and the “birth” of the universe in a Big Bang -
glossary of terms
The study of how life on Earth could have arisen from inanimate matter. It should not be confused with evolution (the study of how living things change over time), biogenesis (the process of lifeforms producing other lifeforms) or spontaneous generation (the obsolete theory of complex life originating from inanimate matter on an everyday basis). -
extrasolar planets
It was only in 1995 that we first discovered evidence that other stars had planets, as ours does. Now we have detected many thousands of other worlds, and evidence suggests that a majority of sun-like stars possess them. Most of these stellar systems bear little resemblance to ours. The easiest planets to detect are massive worlds located close to their stars, so "hot Jupiters" dominate the current list of exoplanets. -
Albert Einstein
He received the Nobel Prize in Physics in 1921 “for his services to theoretical physics, and especially for his discovery of the law of the photoelectric effect” and he made some essential contributions to the early development of quantum theory. He was named "Person of the Century" by Time magazine in 1999, the fourth most admired person of the 20th Century according to a 1999 Gallup poll, and “the greatest scientist of the twentieth
