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12 giu 2024 · Quella macchia color beige, parzialmente coperta dal lungo braccio di spirale di M51 (con il quale interagisce) è un’altra galassia. Si chiama NGC 5195 (o M51b), più piccola e meno luminosa. Fu individuata solo otto anni dopo, nel 1781, da Pierre Méchain.
3 giorni fa · After the Anglo-French Survey, the French Academy of Sciences commissioned an expedition led by Jean Baptiste Joseph Delambre and Pierre Méchain, lasting from 1792 to 1798, which measured the distance between a belfry in Dunkirk and Montjuïc castle in Barcelona at the longitude of the Paris Panthéon.
26 mag 2024 · M106 fu scoperta da Pierre Méchain nel luglio del 1781 e la descrisse come un oggetto nebuloso posto fra l’Orsa Maggiore e i Cani Venatici.
24 mag 2024 · A circa 2.030 anni luce dalla Terra, nella costellazione dell'Orsa Maggiore, si trova la Nebulosa Civetta. Osservata per la prima volta da un collega di Charles Messier, Pierre Méchain, nel 1781, si pensa che la nebulosa relativamente giovane abbia solo 8.000 anni. © Shutterstock
14 giu 2024 · This list, which Messier created in collaboration with his assistant Pierre Méchain, is now known as the Messier catalogue. The Messier catalogue is one of the most famous lists of astronomical objects, and many objects on the list are still referenced by their Messier numbers. [1]
3 giorni fa · Comet 2P/Encke is a periodic comet that takes about 3.3 years to complete one orbit around the Sun. It was first discovered by Pierre Méchain on January 17, 1786, and was later independently rediscovered by Johann Franz Encke on November 2, 1818. The comet is named after Encke, who calculated its orbit and predicted its return in 1822.
14 giu 2024 · The task of surveying the meridian arc, which was estimated to take two years, fell to Pierre Méchain and Jean-Baptiste Delambre. The task eventually took more than six years (1792–1798) with delays caused not only by unforeseen technical difficulties but also by the convulsed period of the aftermath of the Revolution. [8]
