Astronomical Instrument

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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)

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Australian Astronomical Observatory (AAO)

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Galileo and the telescope (The Science Geek)
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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.

  • From the Frontline of Totality: Sky &...
    by The Editors of Sky & Telescope on July 3, 2019 at 1:49 pm

    Thousands of spectators, professional astronomers, and several Sky & Telescope editors traveled to see totality from the ground — and sky. The post From the Frontline of Totality: <em>Sky & Telescope</em> Reports appeared first on Sky & Telescope. […]

  • Where to Watch the July 2, 2019 Total Solar...
    by The Editors of Sky &#38; Telescope on July 1, 2019 at 2:25 pm

    Whether cloudy skies or airfare prevent you from seeing the total solar eclipse on July 2nd, you can still see totality via one of the multiple webcasts we compile here. The post Where to Watch the July 2, 2019 Total Solar Eclipse Online appeared first on Sky & Telescope. […]

  • July 2019: Stalking the Scorpion
    by Kelly Beatty on July 1, 2019 at 11:00 am

    Download July's Sky Tour astronomy podcast for a guided exploration of the planets, stars, and constellations in the evening skies of summer. The post July 2019: Stalking the Scorpion appeared first on Sky & Telescope. […]

  • Jupiter Is Outstanding at Opposition
    by Bob King on June 5, 2019 at 3:08 pm

    Prime-time Jupiter viewing kicks off this month when the planet reaches opposition on June 10th.  The post Jupiter Is Outstanding at Opposition appeared first on Sky & Telescope. […]

  • June 2019: Peekaboo Planets
    by Kelly Beatty on June 1, 2019 at 1:35 pm

    This month's Sky Tour podcast starts with a solstice update and a rundown of lunar phases, then helps you find four planets in the evening sky along with the best stars and constellations of early summer. The post June 2019: Peekaboo Planets 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.

  • Moon-forming disk discovered around distant planet
    on July 11, 2019 at 7:09 pm

    Using Earth's most powerful array of radio telescopes, astronomers have made the first observations of a circumplanetary disk of gas and dust like the one that is believed to have birthed the moons of Jupiter. […]

  • Hubble uncovers black hole that shouldn't exist
    on July 11, 2019 at 3:48 pm

    As if black holes weren't mysterious enough, astronomers have found an unexpected thin disk of material furiously whirling around a supermassive black hole at the heart of the magnificent spiral galaxy NGC 3147, located 130 million light-years away. […]

  • Pair of supermassive black holes discovered on a...
    on July 10, 2019 at 4:15 pm

    Astronomers have spotted a pair of supermassive black holes on a collision course in a galaxy 2.5 billion light-years away. Coincidentally, the pair will begin producing gravitational waves in roughly 2.5 billion years, the researchers estimate. The duo can be used to estimate how many supermassive black hole pairs are detectable in the nearby, present-day universe and when the historic first detection of the background 'hum' of their gravitational waves will be made. […]

  • Exactly how fast is the universe expanding?
    on July 9, 2019 at 3:02 pm

    The collision of two neutron stars (GW170817) flung out an extraordinary fireball of material and energy that is allowing a a team of astrophysicists to calculate a more precise value for the Hubble constant, the speed of the universe's expansion. Previous estimates put the value between 66 and 90 km/s/Mpc, which this team refined to between 65.3 and 75.6 km/s/Mpc. […]

  • New method may resolve difficulty in measuring...
    on July 8, 2019 at 6:00 pm

    Radio telescope observations have made it possible for astronomers to use mergers of neutron-star pairs as a valuable new tool for measuring the Universe's expansion. […]


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.

  • Telescope foes tie together, block road to Hawaii...
    on July 15, 2019 at 3:10 pm

    Hundreds of demonstrators gathered Monday at the base of Hawaii's tallest mountain to protest the construction of a giant telescope on land that some Native Hawaiians consider sacred. […]

  • Successful launch for eROSITA X-ray telescope
    on July 15, 2019 at 2:19 pm

    The Russian-German Spektrum-Roentgen-Gamma (SRG) space mission successfully lifted off from the Baikonur cosmodrome on Saturday, July 13 at 14:31. Onboard is the eROSITA X-ray telescope, which was developed and built by a consortium of German institutes supported by Deutsches Zentrum für Luft- und Raumfahrt (DLR) and led by the Max Planck Institute for Extraterrestrial Physics (MPE). Astronomers from the University of Bonn are involved in the scientific preparation and exploitation. 1.5 […]

  • Russia launches space telescope (Update)
    on July 13, 2019 at 3:31 pm

    Russia launched a space telescope Saturday from the cosmodrome in Baikonur, Kazakhstan, in a joint mission with Germany intended to map X-rays across the sky and replace a project lost in January. […]

  • Joy Division: 40 years on from 'Unknown...
    on July 12, 2019 at 1:50 pm

    The English rock band Joy Division released their debut studio album "Unknown Pleasures" 40 years ago. The front cover doesn't feature any words, only a now iconic black and white data graph showing 80 wiggly lines representing a signal from a pulsar in space. To mark the anniversary of the album, we recorded a signal from the same pulsar with a radio telescope in Jodrell Bank Observatory, only 14 miles (23 km) away from Strawberry Studios where the album was recorded. […]

  • Moon-forming disk discovered around distant planet
    on July 11, 2019 at 7:21 pm

    Using Earth's most powerful array of radio telescopes, astronomers have made the first observations of a circumplanetary disk of gas and dust like the one that is believed to have birthed the moons of Jupiter. […]