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  2. Glossary of astronomy - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_astronomy

    A-type star In the Harvard spectral classification system, a class of main-sequence star having spectra dominated by Balmer absorption lines of hydrogen. Stars of spectral class A are typically blue-white or white in color, measure between 1.4 and 2.1 times the mass of the Sun, and have surface temperatures of 7,600–10,000 kelvin.

  3. List of proposed missions to the outer planets - Wikipedia

    en.wikipedia.org/wiki/List_of_proposed_missions...

    The mission would have used a Jupiter gravity assist [61] and a Uranus flyby to reach and explore Kuiper belt objects. [62] 17 OKEANOS: Oversize Kite-craft for Exploration and Astronautics in the Outer Solar system: 2026 H-IIA or H3 [63] JAXA: Flyby Cancelled Cancelled after being superseded by LiteBIRD in a vote.

  4. Solar System - Wikipedia

    en.wikipedia.org/wiki/Solar_System

    The Solar System remains in a relatively stable, slowly evolving state by following isolated, gravitationally bound orbits around the Sun. [28] Although the Solar System has been fairly stable for billions of years, it is technically chaotic, and may eventually be disrupted. There is a small chance that another star will pass through the Solar ...

  5. NASA's Space Place - Wikipedia

    en.wikipedia.org/wiki/NASA's_Space_Place

    It has its own url, and it also serves as the kids' portion of the NASA Science Mission Directorate website. [4] The site includes informative articles, hands-on activities, and interactive web games. [2] [3] In addition to its content geared toward children, there are resources for parents and educators. It was one of the first NASA websites ...

  6. Astronomy - Wikipedia

    en.wikipedia.org/wiki/Astronomy

    The word "astrochemistry" may be applied to both the Solar System and the interstellar medium. The study of the abundance of elements and isotope ratios in Solar System objects, such as meteorites , is also called cosmochemistry , while the study of interstellar atoms and molecules and their interaction with radiation is sometimes called ...

  7. Discovery and exploration of the Solar System - Wikipedia

    en.wikipedia.org/wiki/Discovery_and_exploration...

    The term "Solar System" entered the English language by 1704, when John Locke used it to refer to the Sun, planets, and comets as a whole. [40] By then it had been stablished beyond doubt that planets are other worlds, then the stars would be other distant suns, so the whole Solar System is actually only a small part of an immensely large ...

  8. Science project - Wikipedia

    en.wikipedia.org/wiki/Science_project

    This student is carrying his science project to school. Display projects involve a creative assembly of a display board and construction of a model to show a visual representation of a larger fact. Making a model of the Solar System, a house, or of a simple electric circuit are considered display projects. Display boards are used to enhance the ...

  9. List of Solar System objects - Wikipedia

    en.wikipedia.org/wiki/List_of_Solar_System_objects

    The following is a list of Solar System objects by orbit, ordered by increasing distance from the Sun. Most named objects in this list have a diameter of 500 km or more. The Sun, a spectral class G2V main-sequence star; The inner Solar System and the terrestrial planets. 2021 PH27; Mercury. Mercury-crossing minor planets; Venus. Venus-crossing ...