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Geocentric belief.Everything moved in perfect circles and was a perfect circle.
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The Earth is in the center of the universe. The sun moon planets and stars move in a perfect path; a circle.
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In his book, "De Revolutionibus Orbium Coelestium" Copernicus established that the planets orbited the sun rather than the Earth. He laid out his model of the solar system and the path of the planets.
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He made some of the most accurate observations of planetary positions which would eventually prove useful to his predecessors.
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Discovery of the four most massive moons of Jupiter. All of his telescope discoveries
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He invented the telescope. His telescope had a concave eyepiece aligned with a convex objective lens.
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He discovered three major laws of planetary motion, conventionally designated as follows(1)All planets move about the Sun in elliptical orbits, having the Sun as one of the foci.(2)A radius vector joining any planet to the Sun sweeps out equal areas in equal lengths of time.(3)The square of the orbital period of a planet is directly proportional to the cube of the semi-major axis of its orbit. This captures the relationship between the distance of planets from the Sun, and their orbital periods.
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Cassini discovered four satellites of the planet Saturn and noted the division of the rings of Saturn; the Cassini Division was named after him.
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Isaac Newton made many discoveries in multiple fields of science, including the discoveries of gravitational force and the three universal laws of motion.
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He was the founder of sidereal astronomy for observing the heavenly bodies.
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He was a businessman, author, mathematician, and astronomer who fueled speculation that there were canals on Mars.
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He was a Danish chemist and astronomer born in Copenhagen. Together with Henry Norris Russell, he developed the Hertzsprung–Russell diagram.
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He used Planck's quantum hypothesis to describe the electromagnetic radiation of light. Einstein's second 1905 paper proposed what is today called the special theory of relativity.
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He played a crucial role in establishing the fields of extragalactic astronomy and observational cosmology and is regarded as one of the most important astronomers of all time.
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Karl Jansky was an American physicist and radio engineer who in August 1931 first discovered radio waves emanating from the Milky Way. He is considered one of the founding figures of radio astronomy.
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He was a United States Marine Corps aviator, engineer, astronaut, businessman, and politician. He was the first American to orbit the Earth, circling it three times in 1962.
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He was the first person to walk on the moon.
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The Sputnik rocket was an unmanned orbital carrier rocket designed by Sergei Korolev in the Soviet Union, derived from the R-7 Semyorka ICBM. On 4 October 1957, it was used to perform the world's first satellite launch, placing Sputnik 1 into a low Earth orbit.
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The first man to fly in space
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The shuttle that first put people on the moon.
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The first flight of the space shuttle program.
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It was an American spacecraft that landed a base station with a roving probe on Mars in 1997
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This was sent to study Saturn and arrived there in 2004.
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A reflecting telescope is an optical telescope which uses a single or combination of curved mirrors that reflect light and form an image. A refracting telescope is a type of optical telescope that uses a lens as its objective to form an image.
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The moon is in a deep freeze just like the Mid West and the North East. Temperatures were down yo -310 Degrees F
