Name ______Date ______

Timeline: Big Bang Scientists ​

Write the dates for each event in time. Add details along the line.

Stephen Hawking (1942­present CE) England Georges Lemaitre ­studies black holes; determined that (1894­1966 CE) black holes emit radiation ­ called Belgium Hawking radiation ­first person to propose that the universe is ­believes that the universe began as expanding a singularity = a black hole ­believed that the universe began in a single point which he called the “primeval atom” Edwin Hubble ­called the Father of the Big Bang (1889­1953 CE) USA Albert Einstein ­discovered more galaxies, some (1879­1955 CE) previously thought to be nebulae Germany ­calculated how fast galaxies are ­developed the General Theory of Relativity and moving away from Earth (perfected the Special Theory of Relativity, which state that calculations made by Lemaitre), the speed of light is constant, time is relative, which became known as Hubble’s and that gravity has an effect on space and time Law Galileo Galilei Isaac Newton (1564­1642 CE) (1643­1727 CE) Italy England ­made his own telescope and used it to discover ­Developed the three Laws of Motion the four largest moons of Jupiter and the phases ­Developed the Law of Universal of Venus Gravitation ­had a heliocentric view of the universe but was ­invented calculus and studied light made to recant and was placed under house arrest until his death Nicolaus Copernicus (1473­1543 CE) Claudius Ptolemy Poland (85­165 CE) ­had a heliocentric view of the Egypt universe and published his beliefs in ­had a geocentric view of the universe a manuscript called De ­was able to mathematically predict the position ​ ​ Revolutionibus Orbium Coelestium of the planets and solar and lunar eclipses in ​ ​ ­believed the sun and stars are fixed spite of his incorrect geocentric view of the (don’t move) but that the Earth orbits universe the sun and rotates on its axis