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  2. Space - Wikipedia

    en.wikipedia.org/wiki/Space

    Space. Space is a three-dimensional continuum containing positions and directions. [1] In classical physics, physical space is often conceived in three linear dimensions. Modern physicists usually consider it, with time, to be part of a boundless four-dimensional continuum known as spacetime. [2]

  3. Solar System - Wikipedia

    en.wikipedia.org/wiki/Solar_System

    720,000 km/h (450,000 mi/h) [10] Orbital period. ~230 million years [10] The Solar System[d] is the gravitationally bound system of the Sun and the objects that orbit it. [11] It was formed about 4.6 billion years ago when a dense region of a molecular cloud collapsed, forming the Sun and a protoplanetary disc.

  4. Katherine Johnson - Wikipedia

    en.wikipedia.org/wiki/Katherine_Johnson

    Website. katherinejohnson.net. Creola Katherine Johnson (née Coleman; August 26, 1918 – February 24, 2020) was an American mathematician whose calculations of orbital mechanics as a NASA employee were critical to the success of the first and subsequent U.S. crewed spaceflights. [1][2] During her 33-year career at NASA and its predecessor ...

  5. Space exploration - Wikipedia

    en.wikipedia.org/wiki/Space_exploration

    Space exploration is the use of astronomy and space technology to explore outer space. [1] While the exploration of space is currently carried out mainly by astronomers with telescopes, its physical exploration is conducted both by uncrewed robotic space probes and human spaceflight. Space exploration, like its classical form astronomy, is one ...

  6. Planet - Wikipedia

    en.wikipedia.org/wiki/Planet

    Main article: Solar System. According to the IAU definition, there are eight planets in the Solar System, which are (in increasing distance from the Sun):[2]Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune. Jupiter is the largest, at 318 Earth masses, whereas Mercury is the smallest, at 0.055 Earth masses.

  7. Astronomy - Wikipedia

    en.wikipedia.org/wiki/Astronomy

    Astronomy is a natural science that studies celestial objects and the phenomena that occur in the cosmos. It uses mathematics, physics, and chemistry in order to explain their origin and their overall evolution. Objects of interest include planets, moons, stars, nebulae, galaxies, meteoroids, asteroids, and comets.

  8. John Herrington - Wikipedia

    en.wikipedia.org/wiki/John_Herrington

    In 2016 Herrington authored a children's book called Mission to Space published by White Dog Press, a secondary imprint of Chickasaw Press. In the book, Herrington shares his passion for space travel and provides a glimpse into his astronaut training and mission to the International Space Station.

  9. Sky - Wikipedia

    en.wikipedia.org/wiki/Sky

    The day 's blue sky, clouds and the Moon. The sky is an unobstructed view upward from the surface of the Earth. It includes the atmosphere and outer space. It may also be considered a place between the ground and outer space, thus distinct from outer space. In the field of astronomy, the sky is also called the celestial sphere.

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