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  2. B-type main-sequence star - Wikipedia

    en.wikipedia.org/wiki/B-type_main-sequence_star

    A B-type main-sequence star (B V) is a main-sequence (hydrogen-burning) star of spectral type B and luminosity class V. These stars have from 2 to 16 times the mass of the Sun and surface temperatures between 10,000 and 30,000 K. [1]

  3. Bathtub curve - Wikipedia

    en.wikipedia.org/wiki/Bathtub_curve

    The 'bathtub curve' hazard function (blue, upper solid line) is a combination of a decreasing hazard of early failure (red dotted line) and an increasing hazard of wear-out failure (yellow dotted line), plus some constant hazard of random failure (green, lower solid line).

  4. Star system - Wikipedia

    en.wikipedia.org/wiki/Star_system

    A multiple star system consists of two or more stars that appear from Earth to be close to one another in the sky. [dubious – discuss] This may result from the stars actually being physically close and gravitationally bound to each other, in which case it is a physical multiple star, or this closeness may be merely apparent, in which case it is an optical multiple star [a] Physical multiple ...

  5. Thuban - Wikipedia

    en.wikipedia.org/wiki/Thuban

    Thuban (/ ˈ θj uː b æ n /), [6] with Bayer designation Alpha Draconis or α Draconis, is a binary star system in the northern constellation of Draco.A relatively inconspicuous star in the night sky of the Northern Hemisphere, it is historically significant as having been the north pole star from the 4th to 2nd millennium BC.

  6. Agus Adi Prayoko - Wikipedia

    en.wikipedia.org/wiki/Agus_Adi_Prayoko

    Agus Adi Prayoko (born 4 May 1989) [1] is an Indonesian artistic gymnast.He won the bronze medal in the men's vault event at the 2018 Asian Games held in Jakarta, Indonesia. [1]

  7. Alnilam - Wikipedia

    en.wikipedia.org/wiki/Alnilam

    Alnilam is the central star of Orion's Belt in the equatorial constellation of Orion.It has the Bayer designation ε Orionis, which is Latinised to Epsilon Orionis and abbreviated Epsilon Ori or ε Ori.

  8. Water vascular system - Wikipedia

    en.wikipedia.org/wiki/Water_vascular_system

    Madreporite of Asterias. In sea stars, water enters the system through a sieve-like structure on the upper surface of the animal, called the madreporite.This overlies a small sac, or ampulla, connected to a duct termed the stone canal, which is, as its name implies, commonly lined with calcareous material.

  9. Steam bath - Wikipedia

    en.wikipedia.org/wiki/Steam_bath

    Roman steam bath located in Bath, England. A steam bath is a steam-filled room or steam-filled cabinet designed for the purpose of relaxation and holistic treatment. Steam baths have been formally recognized since ancient Greek and Roman times, yet variations can be found throughout the Middle East, Asia, Mesoamerica, and Northern Africa [1] [2] [3].