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4 godz. temu · After invention of spectroheliographs and monochromatic filters, flares began to be observed much more often in Hα and some other chromospheric spectral lines.An Hα monochromatic image of a flare often shows two bright ribbons, the distance between which increases with time (Fig. 10.2).The area of emitting regions is from several millionths to several thousandths of the solar hemispheres.
1 dzień temu · Sine and cosine are written using functional notation with the abbreviations sin and cos.. Often, if the argument is simple enough, the function value will be written without parentheses, as sin θ rather than as sin(θ).. Each of sine and cosine is a function of an angle, which is usually expressed in terms of radians or degrees.Except where explicitly stated otherwise, this article assumes ...
4 godz. temu · The Sun's idealized orbit around the Galactic Center in an artist's top-down depiction of the current layout of the Milky Way. ... could be used to trigonometrically determine the distances between Earth, Venus, and the Sun. ... The center is a sun pattern with twelve points around which four birds fly in the same counterclockwise direction.
57 min temu · To delete your account, please follow the instructions below: Visit your Navigraph Account Settings page; Scroll down to "Advanced Settings" Click on "Edit", then "Delete Your Account"
1 dzień temu · The Joggins Formation is a geologic formation in Nova Scotia.It preserves fossils dating back to the Westphalian stage or Moscovian stage of the Upper Carboniferous period or Pennsylvanian period, including Hylonomus, the earliest known reptile.In addition to fossils, the Joggins Formation was a valuable source of coal from the 17th century until the mid-20th century.
1 dzień temu · Enrico Fermi (Los Alamos 1945) The Fermi paradox is the discrepancy between the lack of conclusive evidence of advanced extraterrestrial life and the apparently high likelihood of its existence. As a 2015 article put it, "If life is so easy, someone from somewhere must have come calling by now." Italian-American physicist Enrico Fermi's name is associated with the paradox because of a casual ...
4 godz. temu · Inhoudsopgave. Titel verdrag; Authentiek-EN (Artikelen I-XIII, 1-4) INTERNATIONAL CONVENTION FOR THE SAFETY OF LIFE AT SEA, 1974 (Artikelen I-XIII) Preambule; ARTICLE I General Ob
