And IV
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Andromeda IV
Andromeda IV est une possible galaxie irrégulière qui pourrait faire partie de notre Groupe local, ou bien une galaxie nettement plus lointaine, ou même un amas ouvert de la Galaxie d'Andromède. Découverte par Sidney van den Bergh en 1972 en même temps que les galaxies Andromeda I, II et III, sa nature exacte est toujours sujette à caution.
Les premières estimations de distance d'Andromeda IV conduisaient à 2,9 millions d’années-lumière du Système solaire, ce qui la placerait dans le voisinage immédiat de la Galaxie d'Andromède. En 2000, des mesures effectuées à l'aide du télescope spatial Hubble la placent plutôt entre 16 et 26 millions d'années lumière, ce qui en ferait un objet largement extérieur au Groupe local.
Liens externes
Portail de l’astronomie
Catégories : Galaxie irrégulière | Constellation d'Andromède
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And — And, conj. [AS. and; akin to OS. endi, Icel. enda, OHG. anti, enti, inti, unti, G. und, D. en, OD. ende. Cf, {An} if, {Ante }.] 1. A particle which expresses the relation of connection or addition. It is used to conjoin a word with a word, a… … The Collaborative International Dictionary of English
And — or AND may be any of the following: * Grammatical conjunction, a part of speech that connects two words, phrases, or clauses * Logical conjunction, a two place logical operation used in logic and mathematics * Binary and, an operator used in… … Wikipedia
--- and --- — 1. And is used between repeated words to show continuation or emphasis. * /When the children saw the beautiful Christmas tree they looked and looked./ * /Old Mr, Bryan has known Grandfather for years and years, since they were boys./ * /Billy… … Dictionary of American idioms
--- and --- — 1. And is used between repeated words to show continuation or emphasis. * /When the children saw the beautiful Christmas tree they looked and looked./ * /Old Mr, Bryan has known Grandfather for years and years, since they were boys./ * /Billy… … Dictionary of American idioms
and — conjunction Etymology: Middle English, from Old English; akin to Old High German unti and Date: before 12th century 1. used as a function word to indicate connection or addition especially of items within the same class or type; used to join… … New Collegiate Dictionary
and so on — phrasal and so forth … New Collegiate Dictionary
and/or — conjunction Date: 1853 used as a function word to indicate that two words or expressions are to be taken together or individually < language comprehension and/or production David Crystal > … New Collegiate Dictionary
And did those feet in ancient time — is a short poem by William Blake from the preface to his epic Milton a Poem, one of a collection of writings known as the Prophetic Books. The date on the title page of 1804 for Milton is probably when the plates were begun, but the poem was… … Wikipedia
And so forth — And And, conj. [AS. and; akin to OS. endi, Icel. enda, OHG. anti, enti, inti, unti, G. und, D. en, OD. ende. Cf, {An} if, {Ante }.] 1. A particle which expresses the relation of connection or addition. It is used to conjoin a word with a word, a… … The Collaborative International Dictionary of English
and so forth — or[and so on] And more of the same kind; and further amounts or things like the ones already mentioned. * /The costumes were red, pink, blue, purple, yellow, and so forth./ Compare: WHAT HAVE YOU … Dictionary of American idioms
and then some — And a lot more; and more too. * /It would cost all the money he had and then some./ * /Talking his way out of this trouble was going to take all his wits and then some./ … Dictionary of American idioms
