Catalogues (abbreviated IC), describing a further 5,386 astronomical objects. Thousands of these objects are best known by their NGC or IC numbers, which remain...

agnogenic (agno-, "unknown" + -gen, "cause" + -ic). The word cryptogenic (crypto-, "hidden" + -gen, "cause" + -ic) has a sense that is synonymous with idiopathic...

Kepler-1638 is a G-type main-sequence star located about 5,000 light years away in the constellation of Cygnus. One known exoplanet has been found orbiting...

his rebellious captains to fight and conquer the Spanish treasure fleet in 1638. audacter calumniare, semper aliquid haeret slander boldly, something always...

years away. The star cluster is embedded in the Tadpole Nebula (HII region IC 410). Images of the star cluster by the Chandra X-ray Observatory suggest...

IC 335 is an edge-on lenticular galaxy about 60 million light years (18 million parsecs) away, in the constellation Fornax. It is part of the Fornax Cluster...

Magnificent in 1534, followed by Sultan Murad IV's capture of Baghdad in 1638, a large influx of Turks—predominantly from Anatolia—settled down in Iraq...

astronomical objects May actually be UGC 2119 (02h 37m 58.7s, −01° 50′ 39″) or IC 243 (02h 38m 32.2s, −06° 54′ 07″) Thought to be an open cluster Gaia data...

subsiding coasts". Natural Hazards and Earth System Sciences. 16 (7): 1629–1638. Bibcode:2016NHESS..16.1629T. doi:10.5194/nhess-16-1629-2016. Dahdouh-Guebas...

an early example of a honeycomb structure. Galileo Galilei discusses in 1638 the resistance of hollow solids: "Art, and nature even more, makes use of...