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crosshead    
n. 小标题,子题,联杆器

小标题,子题,联杆器

crosshead
n 1: a heading of a subsection printed within the body of the
text [synonym: {crossheading}, {crosshead}]
2: metal block that connects to a piston; it slides on parallel
guides and moves a connecting rod back and forth


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  • Extremely large telescope - Wikipedia
    An extremely large telescope (ELT) is an astronomical observatory featuring an optical telescope with an aperture for its primary mirror from 20 metres up to 100 metres across, [1][2] when discussing reflecting telescopes of optical wavelengths including ultraviolet (UV), visible, and near infrared wavelengths
  • Rubin Observatory
    Rubin Observatory is packed with innovative technology, from a one-of-a-kind combined primary tertiary mirror to the largest camera ever built Explore the technology that makes Rubin science possible
  • ESO - The European ELT
    The ELT will be the largest optical near-infrared telescope in the world and will gather 13 times more light than the largest optical telescopes existing today
  • Telescope Observing | Leitner Family Observatory Planetarium
    Join us at the Observatory for public stargazing every Tuesday night after sunset (weather permitting) throughout the academic year where our student volunteers set up telescopes to observe the night sky No ticket or reservation needed—just bring your curiosity
  • Plan Your Visit - KPNO
    The Visitor Center 0 5-meter Telescope has a short flight of stairs or a slow elevator to the telescope Reaching the telescope eyepiece, though, may be difficult for guests restricted to wheelchairs (Please let us know in advance if you require the use of our observatory elevator to ensure we are prepared to accommodate you)
  • Observatories - NASA Science
    NASA's EXCLAIM is a balloon mission that will loft a far-infrared telescope to the top of Earth's atmosphere to study how stars and galaxies have formed over time and create 3D maps of the universe
  • Telescopes - Griffith Observatory - Southern California’s gateway to . . .
    On any given night, Observatory staff may set up one or more free-standing telescopes on the front sidewalks to enable more people to put their eyeball to the sky
  • The Extremely Large Telescope: Our Biggest Eye on the Sky
    Explore the universe with Sky Telescope - your ultimate source for stargazing, celestial events, and the latest astronomy news
  • Top 10 US Observatories That You Can Actually Visit and Tour
    See the top US observatories on this unique road trip across the country, from California to Massachusetts via Arizona and New Mexico
  • list of astronomical observatories and telescopes
    Telescopes provide a means of collecting and analyzing radiation from celestial objects, even those in the far reaches of the universe This is a list of astronomical observatories and telescopes ordered alphabetically by location





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