#langrenus

[quiltofstars]

The Moon with featured craters (right to left) Petavius, Balmer, Langrenus, Apollonius, and Firmicus and seas Mare Fecunditatis (”Sea of Fertility”) and Mare Crisium (”Sea of Crises”) // Georges

Petavius crater is named after the French Jesuit Denis Pétau (1583-1652) known for his works on chronology.

Balmer crater is named after the Swiss mathematician Johann Balmer (1825-1898) who studied the hydrogen atom, discovering its series of optical emission lines.

Langrenus crater is named after the Dutch astronomer Michael van Langren (1598-1675) who used observations of the Moon to help determine longitude on Earth.

Apollonius crater is named after Apollonius of Perga (c. 240 BC - 190 BC), an ancient Greek astronomer who defined the terms ellipse, parabola, and hyperbola, and introduced eccentric orbits for the planets.

Firmicus crater is named after Julius Firmicus Maternus (c. 300s AD), a Roman astrologer.

[jmonterol]

Langrenus (1), Vandelinus (2), Petavius (3) #luna #moon #langrenus #vandelinus #petavius #crateresdelaluna #mooncraters #moonlovers #sistemasolar #solarsystem #astrofotografia #astrophotography #desdemiterraza #frommyterrace #maksutovcassegrain #astronomia #astronomy https://www.instagram.com/p/B0yfn1ijOTd/?igshid=14ntujkww8zyw

[leisurelyscientist]

Langrenus Crater on Earth’s Moon

Langrenus Crater on Earth’s Moon

From the Gazetteer of Planetary Nomenclature (https://planetarynames.wr.usgs.gov/Feature/3273), Crater Langrenus was named after Michel Florent van Langren, a Belgian selenographer (somebody who studies the surface and physical features of the moon) and engineer (circa 1600-1675) and is almost 132 KM wide. Tech Specs: Sky-Watcher Esprit 120mm ED Triplet APO Refractor, Celestron CGEM-DX mount, ZWO…

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[johnsschafer]

From last night. To finally see the “Fab Four” so crisp and clear: #Langrenus, #Vendelinus, #Petavius, and #Fernerius craters on the right side (southeast) edge of the #moon. Perhaps the #airplanes wanted to see it too. #mycanonstory #weshootthemoon Camera: Canon EOS 7D Mark II Lens: Canon EF 70-200mm f/2.8L IS II USM Shutter speed: 1/250s Aperture: f/4.0 ISO: 400 Cloudy WB setting Spot AF selection

[leisurelyscientist]

Crater Langrenus on the Moon

Crater Langrenus on the Moon

From the Gazetteer of Planetary Nomenclature (https://planetarynames.wr.usgs.gov/Feature/3273), Crater Langrenus was named after Michel Florent van Langren, a Belgian selenographer (somebody who studies the surface and physical features of the moon) and engineer (circa 1600-1675) and is almost 132 KM wide. Tech Specs: This image is composed of the best 100 frames of 5000 frames captured using a…

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