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)

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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Smithsonian National Air and Space Museum

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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.

  • Is Betelgeuse Approaching a Crossroads?
    by Bob King on February 14, 2020 at 5:28 pm

    Astronomer Edward Guinan of Villanova University has given Betelgeuse an ultimatum of sorts. Guinan, who has closely tracked the star's brightness for the past 25 years, predicts that the supergiant will reach minimum brightness on February 21st, plus or minus a week. In fact, Betelgeuse-watchers have noticed that the rate of dimming has slowed in recent days which may be a sign that an upturn is just around the corner. The post Is Betelgeuse Approaching a Crossroads? appeared first on Sky […]

  • Do You Love the Stars? Do Some Astronomy This...
    by Monica Young on February 14, 2020 at 4:56 pm

    Whether you're celebrating Valentine's Day or boycotting it, anyone visiting this site loves the stars. Here's a chance to participate in an effort to make sure future generations love them too. The post Do You Love the Stars? Do Some Astronomy This Valentine’s Day appeared first on Sky & Telescope.

  • Watch the Moon Occult Mars Before Sunrise on...
    by Bob King on February 12, 2020 at 7:04 pm

    Occultations of stars by the Moon occur routinely, but planetary lunar occultations are much rarer birds. That's why I hope you'll make the effort Tuesday morning February 18th to watch the waning crescent Moon occult the planet Mars. The post Watch the Moon Occult Mars Before Sunrise on February 18th appeared first on Sky & Telescope.

  • February 2020: Five Planets & More!
    by Kelly Beatty on January 31, 2020 at 4:49 pm

    If you drag yourself outside before dawn and then wait until after sunset, you can spot all five of the naked-eye planets. And the Winter Hexagon glides high in the evening sky. The post February 2020: Five Planets & More! appeared first on Sky & Telescope.

  • The Latest on Betelgeuse, Plus a Bright Supernova...
    by Bob King on January 29, 2020 at 5:46 pm

    The sky provides. This winter, the fading of Betelgeuse caught us all by surprise. Now, as January wraps up, we can add a new comet discovery and a supernova bright enough to see in a 6-inch telescope to an ever-growing list of seasonal sky wonders. The post The Latest on Betelgeuse, Plus a Bright Supernova and New Comet Iwamoto 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.

  • Galactic cosmic rays affect Titan's atmosphere
    on February 14, 2020 at 6:47 pm

    Planetary scientists have revealed the secrets of the atmosphere of Titan, the largest moon of Saturn. The team found a chemical footprint in Titan's atmosphere indicating that cosmic rays coming from outside the Solar System affect the chemical reactions involved in the formation of nitrogen-bearing organic molecules. This is the first observational confirmation of such processes, and impacts the understanding of the intriguing environment of Titan.

  • Citizen scientists discover rare cosmic pairing
    on February 12, 2020 at 5:19 pm

    Citizen scientists have uncovered a bizarre pairing of two brown dwarfs, objects much smaller than the Sun that lack enough mass for nuclear fusion. The discovery, confirmed by astrophysicists, shows that brown dwarf systems -- the formation of which are still poorly understood -- can be very low mass and extremely far apart yet inexorably linked.

  • Distant giant planets form differently than...
    on February 10, 2020 at 9:57 pm

    Astronomers have probed the formation process of giant exoplanets and brown dwarfs by using a combination of direct imaging of these objects and custom software to model their orbits.

  • Astronomers reveal rare double nucleus in nearby...
    on February 5, 2020 at 7:33 pm

    Astronomers have revealed that a well-known, nearby galaxy has a rare double-nucleus structure.

  • Astronomers discover unusual monster galaxy in...
    on February 5, 2020 at 4:05 pm

    Astronomers have found an unusual monster galaxy that existed about 12 billion years ago, when the universe was only 1.8 billion years old. Dubbed XMM-2599, the galaxy formed stars at a high rate and then died.


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.

  • Earth's cousins: Upcoming missions to look for...
    on February 15, 2020 at 9:44 am

    Scientists have discovered thousands of exoplanets, including dozens of terrestrial—or rocky—worlds in the habitable zones around their parent stars. A promising approach to search for signs of life on these worlds is to probe exoplanet atmospheres for "biosignatures"—quirks in chemical composition that are telltale signs of life. For example, thanks to photosynthesis, our atmosphere is nearly 21% oxygen, a much higher level than expected given Earth's composition, orbit and […]

  • Breakthrough Listen releases 2 petabytes of data...
    on February 15, 2020 at 12:00 am

    The Breakthrough Listen Initiative today released data from the most comprehensive survey yet of radio emissions from the plane of the Milky Way Galaxy and the region around its central black hole, and it is inviting the public to search the data for signals from intelligent civilizations.

  • New technologies, strategies expanding search for...
    on February 15, 2020 at 12:00 am

    Emerging technologies and new strategies are opening a revitalized era in the Search for Extraterrestrial Intelligence (SETI). New discovery capabilities, along with the rapidly-expanding number of known planets orbiting stars other than the Sun, are spurring innovative approaches by both government and private organizations, according to a panel of experts speaking at a meeting of the American Association for the Advancement of Science (AAAS) in Seattle, Washington.

  • ESO telescope sees surface of dim Betelgeuse
    on February 14, 2020 at 4:15 pm

    Using ESO's Very Large Telescope (VLT), astronomers have captured the unprecedented dimming of Betelgeuse, a red supergiant star in the constellation of Orion. The stunning new images of the star's surface show not only the fading red supergiant but also how its apparent shape is changing.

  • Galactic cosmic rays affect Titan's atmosphere
    on February 14, 2020 at 2:19 pm

    Planetary scientists using the Atacama Large Millimeter/submillimeter Array (ALMA) revealed the secrets of the atmosphere of Titan, the largest moon of Saturn. The team found a chemical footprint in Titan's atmosphere indicating that cosmic rays coming from outside the Solar System affect the chemical reactions involved in the formation of nitrogen-bearing organic molecules. This is the first observational confirmation of such processes, and impacts the understanding of the intriguing […]