Astronomical Instrument

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General

Encyclopedia

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

History




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

Museum


Smithsonian National Air and Space Museum

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WorldCat, Library of Congress, UPenn Online Books, Open Library

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Telescopes (NASA.Gov)
Observational Astronomy (Ask an Astronomer, Cornell University)
Telescopes (Ask an Astronomer, Cornell University)
Telescopes (Cosmos4Kids)

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Crash Course Astronomy (YouTube)

OER Commons: Open Educational Resources

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Careers in Astronomy (Ask an Astronomer, Cornell University)

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USA.gov

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Acapella Science (YouTube Channel)

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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.

  • April’s Lyrid Meteor Shower
    by The Editors of Sky & Telescope on April 19, 2019 at 5:02 pm

    The Moon gets in the way of April's Lyrid meteor shower, but it's still worth scanning the sky for the chance of fireballs. The post April’s Lyrid Meteor Shower appeared first on Sky & Telescope. […]

  • April 2019: Critters on the March
    by Kelly Beatty on April 1, 2019 at 11:00 am

    The Sky Tour astronomy podcast for April 2019 takes you on a guided tour of the predawn sky and then helps you find a Hunter, a Lion, and a Bear in the evening sky. The post April 2019: Critters on the March appeared first on Sky & Telescope. […]

  • It’s Less Than 100 Days Until the Next Total...
    by Jamie Carter on March 25, 2019 at 1:00 pm

    Here’s everything you need to know about the first of South America's two total solar eclipses within 18 months. The post It’s Less Than 100 Days Until the Next Total Solar Eclipse appeared first on Sky & Telescope. […]

  • Amazing Images Capture Giant Fireball Exploding...
    by Bob King on March 20, 2019 at 8:13 pm

    A powerful fireball exploded over the wilds of eastern Russia last December. Satellites captured the whole thing.  The post Amazing Images Capture Giant Fireball Exploding Over the Bering Sea appeared first on Sky & Telescope. […]

  • March 2019: Spot the Winter Hexagon
    by Kelly Beatty on March 1, 2019 at 12:00 pm

    The Sky Tour astronomy podcast for March 2019 takes you on a guided tour of the predawn sky and then helps you find the dazzling stars that make the huge Winter Hexagon — including Sirius, the Dog Star. The post March 2019: Spot the Winter Hexagon 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.

  • New Hubble measurements confirm universe is...
    on April 25, 2019 at 2:41 pm

    New measurements from NASA's Hubble Space Telescope confirm that the Universe is expanding about 9% faster than expected based on its trajectory seen shortly after the big bang, astronomers say. […]

  • Hubble celebrates its 29th birthday with...
    on April 18, 2019 at 5:14 pm

    This incredible image of the hourglass-shaped Southern Crab Nebula was taken to mark the NASA/ESA Hubble Space Telescope's 29th anniversary in space. The nebula, created by a binary star system, is one of the many objects that Hubble has demystified throughout its productive life. This new image adds to our understanding of the nebula and demonstrates the telescope's continued capabilities. […]

  • Five planets revealed after 20 years of...
    on April 17, 2019 at 2:27 pm

    To confirm the presence of a planet, it is necessary to wait until it has made one or more revolutions around its star. This can take from a few days for the closest to the star to decades for the furthest away. Only a telescope dedicated to the search for exoplanets can carry out such measurements over such long periods of time, which is the case of the EULER telescope of UNIGE. […]

  • How to defend the Earth from asteroids
    on April 17, 2019 at 12:46 pm

    The Chelyabinsk meteor caused extensive ground damage and numerous injuries when it exploded on impact with Earth's atmosphere in 2013; to prevent another such impact, scientists plan to use a simple yet ingenious way to spot tiny near-Earth objects. […]

  • Astronomers discover third planet in the...
    on April 16, 2019 at 1:37 pm

    Astronomers have discovered a third planet in the Kepler-47 system, securing the system's title as the most interesting of the binary-star worlds. Using data from NASA's Kepler space telescope, a team of researchers detected the new Neptune-to-Saturn-size planet orbiting between two previously known planets. […]


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.

  • Astronomers find quasars are not nailed to the sky
    on April 25, 2019 at 1:52 pm

    Until recently, quasars were thought to have essentially fixed positions in the sky. While near-Earth objects move along complex trajectories, quasars are so remote that they were believed to offer stable and reliable reference points for use in navigation and plate tectonics research. Now, an international team of astrophysicists featuring researchers from the Moscow Institute of Physics and Technology has found that quasars are not entirely motionless and explained this behavior. The findings […]

  • X-ray observations reveal insights into the...
    on April 23, 2019 at 1:00 pm

    Analysis of the new data from X-ray observations using NASA's NuSTAR spacecraft and archival data from the agency's Chandra X-ray space observatory, has yielded more insights into the nature of a pulsar wind nebula (PWN) named 3C 58. Results of the analysis, presented in a paper published April 12 on arXiv.org, could also shed more light on particle distribution in the population of known PWNe. […]

  • CLASP-2: Investigating the magnetic solar...
    on April 23, 2019 at 12:52 pm

    Four years ago, an international team (USA, Japan and Europe) carried out an unprecedented suborbital space experiment called CLASP-1, motivated by theoretical investigations carried out at the IAC by Javier Trujillo Bueno and his research group. After the outstanding success of that mission, NASA launched CLASP-2 from a launch center near Las Cruces (USA). CLASP-2 has made it possible to detect for the first time the polarization produced by several physical mechanisms in the most intense […]

  • First-ever open public alerts now available from...
    on April 23, 2019 at 12:35 pm

    Two new probable gravitational waves—ripples in the fabric of spacetime caused by cataclysmic cosmic events and first predicted by Albert Einstein over 100 years ago—have been detected by the Laser Interferometer Gravitational-Wave Observatory (LIGO) and the Virgo observatory in Italy in the first weeks after the detectors were updated. The source of both waves is believed to be the merging of a pair of black holes. […]

  • Hubble celebrates its 29th birthday with...
    on April 18, 2019 at 4:47 pm

    This incredible image of the hourglass-shaped Southern Crab Nebula was taken to mark the NASA/ESA Hubble Space Telescope's 29th anniversary in space. The nebula, created by a binary star system, is one of the many objects that Hubble has demystified throughout its productive life. This new image adds to our understanding of the nebula and demonstrates the telescope's continued capabilities. […]