Astronomical Instrument

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General

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Observational astronomy is a division of astronomy that is concerned with recording data about the observable universe, in contrast with theoretical astronomy, which is mainly concerned with calculating the measurable implications of physical models. It is the practice and study of observing celestial objects with the use of telescopes and other astronomical instruments.

Galileo Galilei turned a telescope to the heavens and recorded what he saw. Since that time, observational astronomy has made steady advances with each improvement in a variety astronomical instruments and related methods. — Wikipedia

Observational Astronomy (Eric Weisstein’s World of Astronomy, Wolfram Research)
Observatories & Telescopes (Wolfram Alpha)
Encyclopædia Britannica

Astronomical Instruments, Category (Wikipedia)
Astronomical Instruments, List (Wikipedia)

Introduction



Australian Astronomical Observatory (AAO)

Preservation

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Galileo and the telescope (The Science Geek)
The History of Astronomy (Ask an Astronomer, Cornell University)

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Telescopes (NASA.Gov)
Observational Astronomy (Ask an Astronomer, Cornell University)
Telescopes (Ask an Astronomer, Cornell University)
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OER Commons: Open Educational Resources

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Careers in Astronomy (Ask an Astronomer, Cornell University)

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Observing News & Current Celestial Events – Sky & Telescope The essential guide to astronomy / All Sky & Telescope (www.skyandtelescope.com) content is copyrighted. Please contact us for reuse permissions.

  • Spend an Hour with the Geminid Meteor Shower
    by Bob King on December 12, 2018 at 2:37 pm

    Move over 46P/Wirtanen, it's time for the Geminids, the richest meteor shower of the year. The post Spend an Hour with the Geminid Meteor Shower appeared first on Sky & Telescope. […]

  • Mars and Neptune Have a Close Shave
    by Bob King on December 6, 2018 at 2:42 pm

    Want to find Neptune the easy way? Just point your binoculars or telescope at Mars the next few nights, when the two planets will be in close conjunction. The post Mars and Neptune Have a Close Shave appeared first on Sky & Telescope. […]

  • Tour December’s Sky: Morning Planets
    by Kelly Beatty on November 30, 2018 at 3:07 pm

    December's astronomy podcast urges you to get outside early to gaze on dazzling Venus — then Mercury, then Jupiter — crowding the eastern sky before dawn. The post Tour December’s Sky: Morning Planets appeared first on Sky & Telescope. […]

  • Supernova Discovered in the Bright Galaxy M77
    by Bob King on November 29, 2018 at 6:12 pm

    A new supernova in the bright galaxy M77 in Cetus is within range of amateur telescopes. Here's how to find it. The post Supernova Discovered in the Bright Galaxy M77 appeared first on Sky & Telescope. […]

  • Comet 46P/Wirtanen Approaches Earth
    by Joe Rao on November 26, 2018 at 2:00 pm

    On December 16th, the comet will pass within 12 million kilometers of Earth and should brighten to about 3rd magnitude, though the diffuse coma and a nearly full Moon will make observations difficult. The post Comet 46P/Wirtanen Approaches Earth appeared first on Sky & Telescope. […]


Space Telescopes News -- ScienceDaily Space Telescopes. Astronomy articles and pictures from NASA's Hubble Space Telescope and Chandra X-Ray Telescope and many other leading astronomy institutes from around the world.

  • Solar activity research provides insight into...
    on December 10, 2018 at 4:58 pm

    Scientists have developed a new technique for looking at historic solar data to distinguish trustworthy observations from those that should be used with care. This work is critical to understanding the sun's past and future as well as whether solar activity plays a role in climate change. […]

  • An exoplanet inflated like a balloon
    on December 6, 2018 at 7:12 pm

    Although helium is a rare element on Earth, it is ubiquitous in the universe. It is, after hydrogen, the main component of stars and gaseous giant planets. Despite its abundance, helium was only detected recently in the atmosphere of a gaseous giant by an international team. The team has observed for the first time how this gas escapes from the overheated atmosphere of an exoplanet, literally inflated with helium. […]

  • Mice display altered immune system following...
    on December 6, 2018 at 7:11 pm

    Based on examinations of mice that had been on board the Bion-M1 biosatellite, new research demonstrates that the outer space environment impairs the production of B lymphocytes, the white blood cells responsible for antibody production. The study also shows that such adverse effects persist at least one week after returning to Earth. […]

  • Bringing balance to the universe: New theory...
    on December 5, 2018 at 2:37 pm

    New research could shed light on the 'missing' dark matter and dark energy that make up 95 percent of our universe and yet are wholly invisible to us. […]

  • Combination of space-based and ground-based...
    on December 3, 2018 at 4:16 pm

    Astronomers using a combination of ground and space based telescopes have reported more than 100 extrasolar planets (exoplanets) in only three months. These planets are quite diverse and expected to play a large role in developing the research field of exoplanets and life in the Universe. […]


Phys.org - latest science and technology news stories Phys.org internet news portal provides the latest news on science including: Physics, Nanotechnology, Life Sciences, Space Science, Earth Science, Environment, Health and Medicine.

  • Periodic radio signal detected from the blazar...
    on December 12, 2018 at 2:00 pm

    Using Owens Valley Radio Observatory (OVRO), astronomers have detected a periodic signal in the radio light curve of the blazar J1043+2408, which could be helpful in improving our understanding about the nature of blazars in general. The finding was presented in a paper published November 30 on arXiv.org. […]

  • Calibrating cosmic mile markers
    on December 11, 2018 at 4:09 pm

    New work from the Carnegie Supernova Project provides the best-yet calibrations for using type Ia supernovae to measure cosmic distances, which has implications for our understanding of how fast the universe is expanding and the role dark energy may play in driving this process. Led by Carnegie astronomer Chris Burns, the team's findings are published in The Astrophysical Journal. […]

  • Terahertz laser for sensing and imaging...
    on December 11, 2018 at 12:40 pm

    A terahertz laser designed by MIT researchers is the first to reach three key performance goals at once—high constant power, tight beam pattern, and broad electric frequency tuning—and could thus be valuable for a wide range of applications in chemical sensing and imaging. […]

  • Cataclysmic variable ES Ceti has an accretion...
    on December 10, 2018 at 2:10 pm

    Astronomers have conducted spectroscopic observations of the cataclysmic variable ES Ceti, which resulted in uncovering important insights about gas emission from this object. The new findings, presented in a paper published November 29 on the arXiv pre-print server, suggest the presence of an accretion disk in this system. […]

  • Learning from lunar lights
    on December 7, 2018 at 2:35 pm

    Every few hours observing the moon, ESA's 'NELIOTA' project discovers a brilliant flash of light across its surface – the result of an object hurtling through space and striking our unprotected rocky neighbour at vast speed. Based at the Kryoneri telescope of the National Observatory of Athens, this important project is now being extended to January 2021. […]