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Its emission forbidden lines in the visible spectrum fall primarily at the wavelength 500.7 nm, and secondarily at 495.9 nm. Before spectra of oxygen ions became known, these lines once led to a spurious identification of the substance as a new chemical element.
Mehrabad International Airport (IATA: THR, ICAO: OIII) is an airport serving Tehran, the capital city of Iran.Prior to the construction of the larger Imam Khomeini International Airport in 2007, Mehrabad was Tehran's primary airport for both international and domestic traffic, but now serves only domestic flights.
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Crescent Nebula (Caldwell27) captured by David Rousseau from an urban location in Québec, Canada using Ha and OIII narrowband filters. The Crescent Nebula (also known as NGC 6888, Caldwell 27, Sharpless 105) is an emission nebula in the constellation Cygnus, about 5000 light-years away from Earth.
CEERS-93316 is a high-redshift galaxy with a spectroscopic redshift z=4.9. [3] Significantly, the redshift that was initially reported was photometric (z = 16.4) and would have made CEERS-93316 the earliest and most distant known galaxy observed.
Category 7 is an American heavy metal supergroup formed in 2023. Its lineup features Armored Saint and former Anthrax frontman John Bush, Kerry King sideman and former Machine Head guitarist Phil Demmel, Adrenaline Mob guitarist Mike Orlando, Exodus bassist Jack Gibson, and Overkill and Shadows Fall drummer Jason Bittner.
The Elephant's Trunk Nebula is a concentration of interstellar gas and dust within the much larger ionized gas region IC 1396 located in the constellation Cepheus about 2,400 light years away from Earth. [1]
NGC 2022 is a planetary nebula in the equatorial constellation of Orion, located at a distance of 8.21 kilolight-years from the Sun. [3] It was first observed by William Herschel on December 28, 1785, who described it as: considerably bright, nearly round, like a star with a large diameter, like an ill-defined planetary nebula. [7]