Optical astronomy is the research area focused on observing and analyzing electromagnetic radiation in the optical band, typically encompassing near-ultraviolet, visible, and near-infrared wavelengths accessible to ground- and space-based telescopes using optical elements and detectors. It employs instruments such as imaging cameras, spectrographs, and polarimeters on refracting or reflecting telescopes to study the photometric, spectroscopic, and polarimetric properties of astronomical sources. The field addresses topics including stellar and galactic structure, interstellar medium characterization, planetary systems, and cosmological parameters, and it relies on advanced techniques in adaptive optics, precision calibration, and data reduction to mitigate atmospheric and instrumental effects.
Hold on to your telescopes: The DESI Legacy Imaging Surveys team has released the largest-ever 2D color map of the universe. The 5.6-trillion-pixel map contains nearly 4 billion celestial objects, primarily stars and galaxies. ...
Astronomy
Aug 10, 2026
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A new Vera C. Rubin Observatory image featuring hundreds of thousands of distant galaxies in and around the COSMOS field marks the observatory's first LSST Camera image and catalog release for science.
Astronomy
Aug 3, 2026
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Before any major telescope commissioning, there are dozens of papers that attempt to define what we can expect from it. We're starting to see some come through for the Extremely Large Telescope (ELT), which hopefully will ...
Astrobiology
Jul 31, 2026
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Chinese astronomers report the detection of a peculiar optical transient event that occurred in the center of a dwarf galaxy. The newly discovered event, designated AT2019ijn, is a fast-rising, slow-decaying blue optical ...
Are we alone in the universe? For scientists working on NASA's proposed Habitable Worlds Observatory, that question is no longer purely philosophical. It is increasingly becoming an engineering problem.
Astrobiology
Jul 20, 2026
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The U.S. National Science Foundation National Radio Astronomy Observatory (NSF NRAO) has completed observations for the Very Large Array Sky Survey (VLASS), the most detailed radio survey of the sky ever conducted, providing ...
Astronomy
Jul 14, 2026
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The 1.7 million satellites that companies are aiming to launch into Earth's orbit in the coming years will have "devastating consequences for astronomy," new research warned Wednesday.
Astronomy
Jul 4, 2026
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Astrophysicists working to tackle the growing impact of satellite constellations have pioneered a new ultra-black coating as one possible way to mitigate the problem.
Astronomy
Jul 2, 2026
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A new European Southern Observatory (ESO) study has found that current proposals to launch more than 1.7 million satellites into orbit, including extremely bright ones, would have "devastating consequences for astronomy." ...
Astronomy
Jul 1, 2026
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In celebration of the 250th birthday of the United States, NASA has unveiled four cosmic images from its Chandra X-ray Observatory, rendered in red, white and blue, that represent the wonders of the universe the agency explores. ...
Astronomy
Jun 30, 2026
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